An article posted on Medscape compared the results of plant-based eating, bariatric surgery, and drugs like GLP-1 inhibitors for weight loss to determine which option led to the most long-lasting results. The clear winner: plant-based eating.[1] The article included data from several studies to support this conclusion. A systematic review and meta-analysis showed that 49% of patients who underwent bariatric surgery regained at least some of the weight they lost, and many patients regained a significant amount of weight. Those who were the worst off had Roux-en-Y bypass surgery, with 64% of those patients regaining weight.[2] I’ve written before about the dismal results for GLP-1 inhibitors, and the author of the Medscape article shares my concerns. One trial showed that patients taking the drugs lost weight, but one year after discontinuation, participants regained 2/3 of their weight back.[3] This is not surprising. Permanent weight loss can only take place when people commit to changing their habits, when they learn to make time for self-maintenance, and when they develop a normal relationship with food. Obviously, drugs cannot and do not result in these types of changes. Additionally, the side effects are heinous. Side effects include low blood sugar, nausea, heartburn, vomiting, stomach pain, diarrhea, constipation, sore throat, symptoms of stomach flu, dizziness, thoughts about self-harm, signs of thyroid tumor-like swelling or lump in the neck or trouble swallowing, symptoms of pancreatitis, gall bladder disease, kidney disease, and stomach paralysis.[4] The meds increase the risk for vision loss, which is not usually regained after discontinuation.[5] All of this sounds dismal, but there is a much better way to lose weight – plant-based eating, as the Medscape author concludes. A five-year study led by Dean Ornish, and published in 1998 compared a group of patients who consumed a plant-based diet, engaged in aerobic exercise, received training in stress management, and who had group support with a usual-care control group. The plant-based group lost almost 24 pounds at the end of one year and kept over half of it off 5 years after the intervention. The control group experienced worsening health with continued progression of coronary atherosclerosis.[6] Another study compared outcomes for patients who were obese or overweight with at least one comorbidity. One group consumed a low-fat whole food plant-based diet while the other received standard care. At 6 months, BMI reduction for the plant-based group was 4.4 vs 0.4 for the standard care group.[7] Other studies have shown similar results,[8] [9] and many report not only weight loss, but lower plasma cholesterol, lower blood pressure, reduced fasting glucose levels and other improvements in markers of health. These studies are over 20 years old, and none of them included portion control, which people do not like and almost never maintain. We don’t need more research; rather we just need to pay more attention to the existing body of evidence for guidance on how to help patients lose weight and improve their health. A major impediment is that there is so much less money to be made teaching people how to eat plants than there is in making, distributing and prescribing drugs. This can be changed, however, by forcing medical institutions and health professionals to follow informed consent laws. There are two ways to accomplish this; one is to teach patients to demand objective information from their providers BEFORE making any health-related decisions in non-emergency situations. We teach our members to do this on their own since real INFORMED discussions rarely take place in medical offices. The other option is lawsuits against health professionals and institutions that do not do this. If failure to make informed consent an integral part of medical care becomes expensive enough, providers and institutions likely will change. In the meantime, here is what a doctor SHOULD tell an overweight or obese patient about his/her situation and choices. "I’m concerned about your weight, because it places you at significantly higher risk of coronary artery disease, cancer, diabetes, musculoskeletal disorders, and premature death. I strongly encourage you to do something about this before it gets worse. There are three options. I’ll tell you about each and then send you home with some written material to study. #1: Bariatric surgery. There are significant side effects, and you will likely gain back some or all of the weight you lose. You will suffer from severe nutritional deficiencies that cannot be resolved with supplements. You will eat tiny amounts of food for the rest of your life and if you revert to eating larger portions you will feel sick for a while, stretch out the stomach again, and end up back where you started from. #2 Weight loss drugs, like GLP-1 inhibitors. Side effects include low blood sugar, nausea, heartburn, vomiting, stomach pain, diarrhea, constipation, sore throat, symptoms of stomach flu, dizziness, thoughts about self-harm, signs of thyroid tumor-like swelling or lump in the neck or trouble swallowing, symptoms of pancreatitis, gall bladder disease, kidney disease, and stomach paralysis. If you stop taking the drugs, you’ll likely regain most if not all of the weight you lost, and the side effects may not go away. #3 I can teach you how to eat delicious, low-fat plant food 3-6 times per day – as much as you want of it. You’ll need to invest some time in learning how to do it right, and how to shop and cook. You’ll have to change your mindset about food, and perhaps address psychological issues that cause you to overeat. But if you do this and stick with it, you’ll achieve normal weight, and if you are taking drugs for conditions like blood pressure and type 2 diabetes, you will probably be able to discontinue them. Which would you like to do?" I think most people would choose option three. From Pam Popper, President Wellness Forum Health [1] Betya Swift Yasgur. Nutrition, Drugs, or Bariatric Surgery: What’s the Best Approach for Sustained Weight Loss? Medscape Jan 10 2025 https://www.medscape.com/ [2] Reis MG, Guimaraes LF, Moreira G et al. "Weight regain after bariatric surgery: A systematic review and meta-analysis of observational studies." Obesity Med 2024 Jan;45:100528 [3] Wilding JPH, Batterham RL, Davies M et al. "Weight regain and cardiometabolic effects after withdrawal of semaglutude." Diab, Obes, Metab 2022 Apr;24(8):1553-1564 [4] https://www.drugs.com/ozempic. [5] Hathaway JT, Shah MP, Hathaway DB. Et al. "Risk of Nonarteritic Anterior Ischemic Optic Neuropathy in Patients Prescribed Semaglitude." JAMA Ophthalmol 2024 Jul;142(8):732-739 [6] Ornish D, Scherwitz LW, Billings JH et al. "Intensive Lifestyle Changes for Reversal of Coronary Heart Disease." JAMA 1998;280(23):2001-2007 [7] Wright N, Wilson L, Smith M, Duncan B, McHugh P. "The BROAD study: A randomised controlled trial using a whole food plant-based diet in the community for obesity, ischaemic heart disease or diabetes." Nutr Diabetes 2017 Mar;7(3):e256 [8] Barnard N, Scialli A, Turner-McGrievy G, Lanou A, Glass J. "The effects of a low-fat, plant-based dietary intervention on body weight, metabolism and insulin sensitivity." Am J Med Sept 2005;118(9):991-997 [9] Barnard N, Scialli A, Turner-McGrievy G, Lanou A, Glass J. "The effects of a low-fat, plant-based dietary intervention on body weight, metabolism and insulin sensitivity." Am J Med Sept 2005;118(9):991-997 |
The Centers for Medicare and Medicaid Services (CMS) 2022 National Quality Strategy is described as an "ambitious long-term initiative that aims to promote the highest quality outcomes and safest care for all individuals." This sounds great, and it would be if there were any possible way for this initiative to fulfill its promise. But, as with many programs operated by the government, high-quality outcomes are not likely to occur..
Most doctors and most patients know that diet, exercise, hydration, sleep, and other lifestyle factors are important determinants of health. Clinical practice guidelines for many conditions include recommendations that diet and lifestyle intervention should be the first and is the best treatment. Many studies have shown that type-2 diabetes can be reversed with a whole food plant-based diet (WFPB).[1] [2] Long-term adherence to a WFPB diet has been shown to result in atherosclerotic regression, reduction in angina and reduced risk of cardiac events, even in people who have been diagnosed with severe coronary artery disease.[3] [4]
So why aren’t more doctors spending more time during office visits to discuss these types of health improvement strategies with their patients? The answer might surprise you. Quality measures used to evaluate the performance of doctors and reimbursement schedules do not take into consideration issues such as improved health outcomes and reduced costs of care. For example, adherence to medication is rewarded, even if the patient does not experience any health improvement at all. Diet and lifestyle education requires more time than most medical institutions allocate for patient visits, which further incentivizes prescribing instead of engaging in meaningful discussions about health.
Thus, in most cases, patients are not informed about diet and lifestyle change as an option or an alternative to medication. A commonly held misconception is that most Americans would rather just take a pill than change their diet and increase their exercise. But the reality is that this choice, along with the risks and benefits of both options, is not presented to most patients most of the time.
Lifestyle medicine is now a medical specialty, and since certification began in 2017, 2500 physicians have become board-certified. In addition to the limitations already mentioned, a survey found that over half of lifestyle medicine clinicians receive no reimbursement for offering such services. And some programs that are eligible for reimbursement offer so little money that clinicians cannot afford to spend time on them.[5]
One program that is reimbursed adequately is intensive cardiac rehabilitation. It’s underutilized and one of the reasons may be that patients are required to co-pay for visits. For the program to work, visits need to be scheduled frequently, increasing the expense to patients, and creating yet another barrier to real health improvement.
One of the best illustrations of just how dysfunctional the current system has become is what happened to a lifestyle medicine family practice physician who prescribed lifestyle change instead of a statin drug to a patient with hyperlipidemia. Within just three weeks, total cholesterol dropped from 226 mg/dl to 171 mg/dl and triglycerides dropped from 132 mg/dl to 75 mg/dl. This was obviously a great outcome for the patient. But the CMS 5-Star Rating System assigned the physician a Grade C, which placed the doctor’s previous 5-star rating at risk. The reason was that scores are largely based on medication compliance. The physician was penalized even though the outcome was much better than would be expected from treatment with a statin.[6]
There are other ways the system can punish doctors for curing people. The sicker the patient, the higher the reimbursement rate from Medicare, because it is assumed that care will cost more. The physician who reverses type 2 diabetes with diet is penalized because diabetes is no longer listed as a condition the patient has, so Medicare pays the doctor less money. In other words, Medicare pays doctors to manage, not reverse disease.[7]
There are now over 2500 quality measures for doctors to pay attention to, and curing people is not one of them. This sad state of affairs reinforces our advice that consumers must take responsibility for their health and should not outsource decisions about treatment to their doctors.
[1] Anderson JW. "Dietary fiber in nutrition management of diabetes." In: G. Vahouny, V and D Kritchevsky (eds), Dietary Fiber: Basic and Clinical Aspects." Pp.343-360. New York: Plenum Press,1986.
[2] De Natale C, Annuzzi G, Bozzetto L et al. "Effects of a Plant-Based High-Carbohydrate/High-Fiber Diet Versus High–Monounsaturated Fat/Low-Carbohydrate Diet on Postprandial Lipids in Type 2 Diabetic Patients." Diabetes Care 2009 Dec;32(12):2168-2173
[3] Ornish D, Scherwitz LW, Billings JH et al. "Intensive lifestyle changes for reversal of coronary heart disease." JAMA 1998 Dec;280(23):2001-2007
[4] Esselstyn CB, Ellis SG, Mendendorp SV, Crowe TD. "A strategy to arrest and reverse coronary artery disease: a 5-year longitudinal study of a single physicians’ practice." J Fam Practice 1995 Dec;41(6):560-568
[5] Padmaja Patel MD. How PCPs Are Penalized for Positive Outcomes From Lifestyle Change. Medscape October 13 2023
[6] IBID
[7] IBID
Pam Popper Wellness Forum Health
There are many misunderstandings about the ketogenic diet, ranging from the conditions for which it can be useful to the right way to adopt it. Many people claim to be eating a ketogenic diet who are not doing so, and many of the claims currently being made about the diet are patently false. The ketogenic diet is a high-fat, low-carbohydrate diet that has been used since 1921 as an effective treatment for several forms of epilepsy. While primarily used for children, there is some evidence that some epileptic adults may benefit too. The best experts on the diet are at Johns Hopkins Children’s Center. The mechanism of action that explains the efficacy of the ketogenic diet is that it mimics a fasting state, and fasting has been known to be an effective treatment for seizures since ancient times.[1] Within a short time after beginning a fast, the body stops using glucose and converts to using stored fat for fuel, a state known as ketosis. During ketosis, ketones are produced, which are useable as a substitute source of energy for both the body and brain. The ketogenic diet results in the same effect. Restricted carbohydrate intake results in burning dietary fat for fuel, which allows for an extended period of time in a fasting state. Fat stores are used up within a relatively short period time, while living off of dietary fat intake can continue for much longer periods of time. Research shows that the diet works when implemented properly. A 2001 study at Johns Hopkins showed that 75 out of 83 epileptic children who consumed a ketogenic diet for a year had either partial or full resolution of their symptoms and improvement was sustained after stopping the diet.[2] In another study, 65 epileptic children between 18 and 24 months of age were assessed before starting and after one year on the diet. For those who remained on the diet (52%), mean seizure frequency decreased from an average of 25 seizures per day prior to the diet to less than 2 per day, and was accompanied by significant improvements in both attention and social functioning.[3] A meta-analysis of 11 studies showed that 16% of children experienced complete resolution of seizures, 32% experienced a 90% reduction, and 56% had a greater than 50% reduction in seizures.[4] While ketogenic diets can be effective, there are side effects. One study of pediatric patients treated with the Johns Hopkins protocol showed that during the first 4 weeks, dehydration and gastrointestinal complications were common, and infectious diseases, aspiration pneumonia, hyperuricemia, hypoglycemia, electrolyte imbalances, acidosis, hepatitis, and acute pancreatitis have been reported. After 4 weeks, patients remain prone to all of these complications except dehydration, pancreatitis, and hyponatremia. In almost 15% of patients, osteopenia, kidney stones, hydronephrosis, iron deficiency anemia, and cardiomyopathy developed after one month in ketosis. Some patients dropped out of the study due to the side effects of the diet.[5] Vomiting, constipation, kidney stones and an increase in plasma cholesterol are common. Kidney stones can be prevented by supplementing with potassium citrate, and cholesterol levels return to normal after the diet is stopped.[6] The bottom line is that while the diet is effective for most children who adopt it, there are side effects, and patients must be carefully monitored while using the diet for medical treatment. The diet is only adopted for a short period of time, and for many parents of epileptic children, the benefits outweigh the risks since drugs used to treat epileptic children are often ineffective and have even more side effects. Interest in ketogenic diets has increased recently, in part because of the positive effects fasting has been shown to have on cancer patients. Animal studies have shown that fasting is effective for reducing the side effects of chemotherapy, and for decreasing circulating IGF-1 levels, a known risk for cancer.[7] The same effect has been shown in human subjects.[8] Fasting can be an effective strategy for both preventing and treating cancer because cancer cells are weakened and normal cells are strengthened in response to food restriction.[9] The reason is that humans have historically lived for long periods of time with limited food and sometimes no food at all. Normal cells are adept at surviving under these circumstances, converting to burning ketones for fuel, while cancer cells cannot live on ketones. Water-only fasting can be undertaken by many people for a few weeks, and obese people can fast for several months. But people cannot fast indefinitely, and some aggressive cancers, particularly brain cancers like glioblastoma, do not completely resolve after a few weeks of fasting. Traditional treatments are notoriously ineffective for these patients, who have grim prognoses and usually only a few months to live after diagnosis. Thomas Seyfried, Ph.D., has spent his career studying the use of metabolic therapies to manage mainly chronic and difficult-to-treat conditions like epilepsy and brain cancer. In his book, Cancer as a Metabolic Disease, he provides extensive documentation showing that cancer is not a genetic disease, but rather a mitochondrial metabolic disease. This is not a new idea, but one that was largely forgotten as very profitable cancer treatments such as surgery, chemotherapy and radiation became standard practices. He proposes the use of several therapies which include calorie restriction, fasting, and a ketogenic diet for addressing difficult-to-treat cancers. He presented a lecture on this topic during our 2016 conference, citing a few case reports, one of whom was a woman who lived for 7 ½ years after her diagnosis, almost unheard of for glioblastoma patients. And this brings me to the current misunderstandings about the ketogenic diet, which originate both from those who advocate a plant-based diet and those who promote Paleo and other diets. First, the Paleo diet and the Atkins diet are not ketogenic diets. Just eating animal foods while restricting grains and beans, or eating a high-saturated fat diet will not result in ketosis, which is required for the diet to have any therapeutic effect. A ketogenic diet requires the assistance of well-trained professionals because the macronutrient make-up of the diet must be exact and consistently maintained. A keto monitor is required, and patients must test themselves several times per day to make sure they remain in ketosis. Second, due to the side effects of the diet, some of which are quite serious, the ketogenic diet should only be adopted by patients for whom the benefits outweigh the risks. For example, a glioblastoma patient with only a few months to live is better off staying alive while taking potassium supplements to avoid kidney stones than dying with low plasma cholesterol levels. On the other hand, the risks of side effects from the ketogenic diet are not warranted for a person who wants to lose weight or reverse type 2 diabetes. Low-fat, plant-based diets have been proven to be effective for these purposes without the negative side effects. On the other hand, advocates of plant-based diets can become almost apoplectic when the ketogenic diet is mentioned for treatment. A diet high in fat and that restricts healthy carbohydrate foods like potatoes seems like heresy to them. They think that a very low-fat plant-based diet is the answer for everything. It’s the answer for a lot of things, but not everything. Those who take this stance - a one-size-fits-all approach to treating patients - are both practicing reductionism and abandoning the use of clinical judgment, which is desperately needed in the practice of medicine today. People are not all the same, and their age, limitations, medical history and current state of health must all be considered when making any health-related recommendations, including those concerning diet. Dietary advice must be tailored to the particular condition of the patient, and often must be combined with other treatments that include dietary supplements, cognitive therapy, exercise, physical therapy, and some conventional treatment. It is important to avoid dogmatic adherence to ideas, and to think outside the box as we seek solutions for our healthcare crisis. In summary, the ketogenic diet is an option to be considered for very specific situations for a very small percentage of people. It requires a rigorous and disciplined approach in order to be effective, and almost always involves hiring an expert for assistance. The diet has serious side effects, which should be disclosed to patients before adopting the diet, and which make it a good choice only when the potential therapeutic benefit outweighs the risks. [1] Huffman J, Kossoff E. "State of the ketogenic diet(s) in epilepsy." Curr Neurol Neurosci Rep 2006 Jul;6(4):332-340 [2] Freeman J, Kossoff E. "Ketosis and the ketogenic diet, 2010: advances in treating epilepsy and other disorders." Adv Pediatr 2010;57(1):315-329 [3] Pulsifer M, Gordon J, Brandt J, Freeman J. "Effects of ketogenic diet on development and behavior: Preliminary report of a prospective study." Dev Med Child Neurol 2001 May;43(5):301-6. [4] Lefevre F, Aronson N. "Ketogenic Diet for the Treatment of Refractory Epilepsy in Children: A Systematic Review of Efficacy." Pediatrics 2010 Apr;105(4) [5] Kang H, Chung D, Kim D, Kim H. "Early- and late-onset complications of the ketogenic diet for intractable epilepsy." Epilepsia 2004 Sep;45(9):1116-1123 [6] Freeman J, Kossoff E. "Ketosis and the ketogenic diet, 2010: advances in treating epilepsy and other disorders." Adv Pediatr 2010;57(1):315-329 [7] Lee C, Safdie FM, Raffaghello L, et al. "Reduced levels of IGF-I mediate differential protection of normal and cancer cells in response to fasting and improve chemotherapeutic index." Cancer Res 2010 Feb 15;70(4):1564-72 [8] Safdie F, Dorff T, Quinn D et al. "Fasting and cancer treatment in humans: A case series report." Aging (Albany NY) 2009 Dec; 1(12): 988–1007. [9] Brandhorst S, Longo V. "Fasting and Caloric Restriction in Cancer Prevention and Treatment." Recent Results Cancer Res 2016;207:241-266 |
Negative self-talk is toxic to the brain...I often hear from people who proclaim that they cannot make the changes that they would like to see in their lives. "I just can't do it", "I can't exercise that much", I can't stop eating______(fill in the blank)". "I will probably fail, so what's the use of trying."
We all have that inner voice that makes critical, negative, or punishing comments about ourselves that makes us feel defeated or hopeless. And most times, you think that you are being realistic about yourself. But this inner dialogue with yourself limits your ability to believe that you have the potential to achieve positive changes.
Research has found that excessive ruminations of negativity is linked to an increased risk of mental health problems, including depression, anxiety disorders, PTSD, psychosis, and OCD.
Focusing on your negative thoughts and telling yourself that you "can't do it" will only lead to decreased motivation and helplessness.
This brings us to the science of neuroplasticity. The brain has a capacity to adapt and change over time by creating new neurons and building new networks, It has the capacity to be shaped, molded or altered. It can continue to grow and evolve in response to new experiences. But you can be in a "rut" because of your consistent negativity. This means that you have the capacity to change dysfunctional patterns of thinking.
If you think that you are in a "rut", maybe it is time to "plow". View your rut the same way you view the hard, dry, and unreceptive dirt that is not capable of growing anything. Replacing those bad habits with healthier habits, one day at a time (sometimes even one hour at a time) is what changes our brain and starts plowing up the hard rut.
James Clear, author of Atomic Habits, states that behavior that is rewarded will be repeated. What is ONE unhealthy habit that you would like to change today? Speak those positive and affirming words to yourself because you are worth it.
Liz Fattore
Your Wellness Lifestyle Starts Here
Collagen-we are hearing about it a lot and it seems to be popping up in a lot of products, with marketers telling us how much we need it. So, what is it, how does our body make it, and do we need to supplement? Can we get heathier skin, nails and more by consuming collagen peptides? Let's take a look at what the research and the science say.
What Is Collagen?
Collagen is a group of “hard, insoluble, fibrous” proteins that give structure to connective tissue and constitute about one-third of your body’s protein. Over two dozen types of collagen have been identified; these are the three most prominent types:
- Type I, found in the skin, tendons, teeth, internal organs, and bones
- Type II, found in the eyes and cartilage
- Type III, found in the skin, muscles, bone marrow, lymphoid tissue, and blood vessels
Ligaments, hair, and protective membranes around organs also contain collagen.
The body forms collagen from amino acids, mainly proline, glycine, lysine, and hydroxyproline, and other nutrients, including vitamin C, zinc, copper, and manganese.
Are There Scientifically Proven Benefits to Consuming Collagen?
Some research suggests that collagen supplements confer benefits:
- improved skin health and appearance, including better elasticity, increased hydration, and fewer wrinkles[1][2]
- less joint pain and stiffness for osteoarthritis patients[3]
- faster wound healing[4]
- increased muscle mass when paired with resistance training[5]
- increased bone mineral density[6]
However, not all studies have found similar benefits, and many (if not most) of the studies that report benefits are funded by companies selling collagen supplements. It’s also not uncommon for studies like these to include additional supplements that muddle the results. For example, in one of the studies on skin referenced above, the treatment group received a blend of collagen peptides, acerola fruit extract, vitamin C, zinc, vitamin E, and biotin.[1] The placebo, however, contained no nutrients. How are we supposed to know the extent to which the collagen supported the observed outcomes, if it did at all?
As reported in a 2022 systematic review, several studies have also reported adverse effects and low efficacy compared to routine treatments.[7] They conclude, “risk of bias assessment showed that most of the studies had poor quality. Further studies are needed to reach a final decision.”
Because the body breaks collagen down into its constituents, including amino acids, it’s also unclear whether the apparent benefits of collagen supplements come from the collagen as a whole or merely from its amino acid components, which can be obtained more effectively from whole foods.
Another thing you may have seen is collagen boosters, which are supplements containing the building blocks your body uses to produce collagen. Putting aside the obvious fact that you can get all the necessary building blocks from whole foods, these collagen boosters are not without their risks. Like all supplements in the US, they are barely regulated by the FDA. They may not contain the amounts and types of nutrients listed on their labels; they may be contaminated with heavy metals and other environmental toxins; and because toxins accumulate higher up the food chain, animal-derived collagen peptides may have even more toxins than the average supplement.
How Can I Increase Collagen Production Naturally?
Eating foods containing the amino acids and nutrients from which collagen is formed provides your body with the raw materials for making more collagen without supplements. You can find these raw materials in whole plant foods: legumes, nuts, seeds, fruits, vegetables, and whole grains.
Most likely, you do not need to concern yourself about collagen production if you take the following steps:
- Consume enough protein for your activity level (this will not be a challenge if you get enough calories).
- Eat leafy greens and other colorful fruits and vegetables for plenty of vitamins and minerals.
- Add hemp and pumpkin seeds, cashews, and other high-zinc nuts and seeds to your meals.
- Enjoy plenty of beans, root vegetables, and whole soy products in your diet to increase your intake of hyaluronic acid, a component of the collagen in the skin.
Additionally, you can preserve the collagen you already have by avoiding unhealthy lifestyle choices and non-whole plant-based foods, including oils, that increase free radical production or inflammation. Avoid excessive UV exposure and don’t smoke.
If you follow these recommendations and eat a wide variety of whole plant foods, your body should produce all the collagen it needs without any of the risks associated with collagen supplements. If you have an underlying condition affecting your collagen production, speak to a qualified physician to address the root cause.
References:
Theresa Houghton, Center for Nutrition Studies
- Bolke L, Schlippe G, Gerß J, Voss W. A Collagen Supplement Improves Skin Hydration, Elasticity, Roughness, and Density: Results of a Randomized, Placebo-Controlled, Blind Study. Nutrients. 2019;11(10):2494. Published 2019 Oct 17. doi:10.3390/nu11102494
- de Miranda RB, Weimer P, Rossi RC. Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis. Int J Dermatol. 2021;60(12):1449-1461. doi:10.1111/ijd.15518
- Lugo JP, Saiyed ZM, Lane NE. Efficacy and tolerability of an undenatured type II collagen supplement in modulating knee osteoarthritis symptoms: a multicenter randomized, double-blind, placebo-controlled study. Nutr J. 2016;15:14. Published 2016 Jan 29. doi:10.1186/s12937-016-0130-8
- Bagheri Miyab K, Alipoor E, Vaghardoost R, et al. The effect of a hydrolyzed collagen-based supplement on wound healing in patients with burn: A randomized double-blind pilot clinical trial. Burns. 2020;46(1):156-163. doi:10.1016/j.burns.2019.02.015
- Zdzieblik D, Oesser S, Baumstark MW, Gollhofer A, König D. Collagen peptide supplementation in combination with resistance training improves body composition and increases muscle strength in elderly sarcopenic men: a randomised controlled trial. Br J Nutr. 2015;114(8):1237-1245. doi:10.1017/S0007114515002810
- König D, Oesser S, Scharla S, Zdzieblik D, Gollhofer A. Specific Collagen Peptides Improve Bone Mineral Density and Bone Markers in Postmenopausal Women-A Randomized Controlled Study. Nutrients. 2018;10(1):97. Published 2018 Jan 16. doi:10.3390/nu10010097
- Jabbari M, Barati M, Khodaei M, et al. Is collagen supplementation friend or foe in rheumatoid arthritis and osteoarthritis? A comprehensive systematic review. Int J Rheum Dis. 2022;25(9):973-981. doi:10.1111/1756-185X.14382
- Reisdorf A. Here’s what you need to know about vegan collagen. Healthline. Updated March 8, 2019. https://www.healthline.com/health/food-nutrition/vegan-collagen
