Best Collagen for Men: Doses, Trials and 6 Labels Compared
Love Life Supplements
Reviewed by Sarah Law, Dip CNM, Naturopathic Nutritionist
The best collagen for men is a hydrolysed collagen peptide powder that states its grams per serving and gives 10 to 15 g in one scoop, because the trials that recruited men gave 15 g a day for 12 weeks alongside resistance training (and 5 g a day in the tendon and knee studies). Collagen is not a men's product at the level of the molecule: "men's collagen" uses the same bovine, marine or chicken peptides as any other. What is specific to men is how the research was done, with most muscle and tendon trials run in men who lift. Our pick for men who want the trial amount in one scoop is our own Ultimate Collagen Peptides: 15 g of BODYBALANCE bovine collagen (the peptide used in all three muscle trials in men), 40 mg of UC-II and 200 mg of vitamin C, unflavoured, £1.63 a day on our UK store (£1.47 for a new subscriber). If 10 g a day is enough and price is all that matters, a plain bovine powder such as Nutravita's costs less (£0.38 a scoop), and we show both in the table below.
Our figures come from our printed label (UltimateBodybalanceCollagen, version 6). Love Life Supplements Ultimate Collagen Peptides gives 15 g of BODYBALANCE hydrolysed bovine collagen, 40 mg of UC-II undenatured chicken collagen and 200 mg of vitamin C (250% of the NRV) in an 18.2 g heaped scoop, with 13.5 g of protein, 54 kcal, 0 g of sugar and 30 servings in a 547 g tub. An independent Eurofins test of batch 06500062 measured 6.64 g of glycine per serving against 6.32 g on the label, and vitamin C at 200 mg. It is made in the UK under BRC standards, costs £48.95 on our UK store (£44.06 for the first Subscribe & Save order), is covered by our 60-day money-back guarantee, and is not sold on our US store.
Ultimate Collagen Peptides: 15 g bovine collagen, 40 mg UC-II and 200 mg vitamin C per scoop, unflavoured, 30 servings. Sold on our UK store.
View collagen- 15 g a day with training is the amount used in the three muscle and body composition trials in men (young, middle-aged and over 65). The tendon and knee studies used 5 g a day.
- Collagen is not a replacement for whey. It has almost no tryptophan and little leucine; whey raised muscle protein synthesis in a head-to-head trial and collagen did not.
- Powder is the only form that reaches 10 to 15 g in one serving. The men's tablets we read give 5 g from six tablets.
- "Men's collagen" often means extras, such as 900 mcg of biotin and a herbal extract, rather than more collagen.
- No collagen has an authorised health claim in the UK or EU. Vitamin C does: it contributes to normal collagen formation for the normal function of blood vessels, bones, cartilage, gums, skin and teeth.
- Price per 10 g of collagen ran from £0.38 to $1.39 across the six products we compared. Ours is £1.09 (£0.98 on subscription).
What makes the best collagen for men?
The best collagen supplement for a man is the one that gives a clearly stated, trial-sized amount of hydrolysed collagen in a form he will take every day for at least three months. Most of the collagen research in men comes from sports science groups who gave 15 g a day after training sessions, so the useful question is whether a product reaches that amount at a price you will keep paying.
We judged every product on this page on five things you can check on the label or the brand's own page:
- Grams of collagen per serving, stated as a number, not hidden in a proprietary blend.
- Form: hydrolysed collagen peptides (also sold as collagen hydrolysate), which is what the trials used.
- Source and type: bovine (types I and III), marine (mainly type I) or chicken (type II), declared on the label.
- What else is in it: vitamin C is useful and carries an authorised claim; creatine can be handy; high-dose biotin and herbal extracts are worth noticing.
- Price per serving and per 10 g of collagen, because the trials in men ran for 12 to 14 weeks, so cost adds up.
Our wider ranking of collagen supplements on dose and cost is in best collagen supplements UK: 9 compared, and the women's version of this guide is best collagen for women. This page focuses on the questions men ask: training, muscle, whey, creatine and life after 50.
Best collagen for men: six labels and prices compared
We read the supplement facts of six collagen products widely bought by men in the UK and US, including our own, and worked out the price per serving and per 10 g of collagen from each brand's own listed price. The table is sorted by grams of collagen per serving.
| Product | Form and source | Collagen per serving | Also in a serving | Price per serving | Price per 10 g collagen |
|---|---|---|---|---|---|
| Vital Proteins Collagen Peptides Unflavored | Powder, bovine | 20 g (4 tbsp) | 18 g protein; nothing added | $1.93 ($27.00, about 14 servings) | $0.96 |
| Momentous Collagen Peptides | Powder, bovine | 16.8 g (11.6 g peptides + 5.2 g FORTIGEL) | 50 mg vitamin C; NSF Certified for Sport | $1.83 ($54.99, 30 servings) | $1.09 |
| Love Life Supplements Ultimate Collagen Peptides | Powder, bovine (BODYBALANCE) with UC-II chicken collagen | 15 g + 40 mg UC-II | 200 mg vitamin C; 0 g sugar | £1.63 (£48.95, 30 servings); £1.47 first subscription order | £1.09 (£0.98 subscribed) |
| Nutravita Premium Gold Standard Bovine Collagen Powder | Powder, bovine (types I and III) | 10 g | Nothing added | £0.38 (£18.99, 50 servings) | £0.38 |
| Vital Proteins Advanced Collagen Peptides + Creatine | Powder, bovine | 10 g (2 tbsp) | 5 g creatine monohydrate; NSF Certified for Sport | $1.39 ($24.99, about 18 servings) | $1.39 |
| Youtheory Men's Collagen Tablets | Tablets (6) | 5 g | 60 mg vitamin C, 900 mcg biotin, 420 mg fo-ti root extract | $0.62 ($15.99, 160 tablets, 26 servings) | $1.23 |
Competitor figures from each brand's own product page or supplement facts image (vitalproteins.com, livemomentous.com, youtheory.com, nutravita.com), read 5 November 2026. Nutravita's figure is from its page text ("each 10g scoop delivers 10g unflavoured collagen"). Our figures from our printed label; our prices read live from our UK store on 5 November 2026. Prices shown in the currency each brand sells in; we do not convert. Prices change; check before you buy.
What the table shows:
- Only the powders reach the 15 g used in the trials in men in one serving. To get 15 g from the men's tablets you would need 18 tablets a day.
- Cheapest per gram is a plain powder. Nutravita (£0.38 per 10 g) and Vital Proteins ($0.96) cost less per 10 g of collagen than ours (£1.09). Ours adds 200 mg of vitamin C and UC-II, and uses BODYBALANCE, the specific peptide given in the muscle trials in men.
- Certified for sport. Momentous and the Vital Proteins creatine blend carry NSF Certified for Sport, which matters if you are drug tested in competition. Ours is independently batch tested (results below) but is not NSF certified.
- The men's tablet is mostly extras. Youtheory's 5 g of collagen comes with 900 mcg of biotin (3,000% of the US Daily Value) and 420 mg of fo-ti, a herbal extract.
For tablets, capsules, gummies and liquids in more depth, including how many pills equal one scoop, see collagen powder vs capsules vs gummies: dose and price compared.
Should men take collagen?
Men can take collagen, and men are the group most of the training research was done in. It is optional rather than necessary: collagen is not an essential nutrient, and your body builds its own from the amino acids in the protein you eat. Where a supplement makes most sense is for a man who lifts weights or trains several times a week and wants an easy extra 10 to 15 g of protein a day; these are the trials that recruited men:
| Trial | Who took part | Daily dose and length | What was measured |
|---|---|---|---|
| Zdzieblik 20151 | 53 men, average age 72, with sarcopenia | 15 g BODYBALANCE after training, 12 weeks of resistance training 3 times a week | Fat-free mass +4.2 kg vs +2.9 kg with placebo; quadriceps strength +16.5 vs +7.3 Nm; fat mass -5.4 vs -3.5 kg |
| Kirmse 20192 | 57 recreationally active young men | 15 g, 12 weeks of resistance training 3 times a week | Fat-free mass rose more than with placebo; both groups gained strength; muscle fibre size grew equally in both |
| Zdzieblik 20213 | 97 untrained middle-aged men | 15 g collagen, placebo or whey, 12 weeks of resistance training | Fat-free mass +3.42 kg (collagen) vs +1.83 kg (placebo) and +2.27 kg (whey); collagen vs whey not significantly different |
| Jerger 20234 | 50 moderately active men | 5 g, 14 weeks of heavy knee-extension training | Larger increase in patellar tendon cross-section than placebo; strength and muscle size rose equally in both groups |
| Kirmse 20245 | 25 young men | 15 g twice a day, 1 week of intense training | No higher muscle or connective tissue protein synthesis than placebo |
Results as reported by each trial's authors; not a promise of any effect. All three muscle trials (2015, 2019 and 2021) used BODYBALANCE peptides supplied by GELITA, and the 2015 and 2021 trials involved the Collagen Research Institute; a 2025 correction to the 2015 paper added that GELITA paid part of its costs. A 2024 meta-analysis of 19 trials (768 healthy adults who trained) found results in favour of collagen for fat-free mass, with moderate certainty, and smaller or less certain results for strength and tendons.6
Two honest limits sit beside those results. The gains came with a structured training programme, and both groups improved; collagen added to the training rather than standing in for it. And the extra fat-free mass did not show up as bigger muscle fibres in the one trial that took biopsies, so the authors suggested some of it may be connective tissue rather than muscle. More on what collagen protein does for muscle and bone in collagen protein for muscle mass and bone health.
"With the men I work with, I ask what their protein looks like across the day before we talk about collagen. If breakfast is toast and coffee, fixing that comes first. Once the meals are in place, a scoop of collagen in the morning coffee is an easy extra that they actually keep up, which matters more than the exact brand."
Sarah Law, Naturopathic Nutritionist | Optimised Female
How much collagen should a man take a day?
The trials in men used two amounts: 15 g a day in the muscle and body composition studies and 5 g a day in the tendon and knee studies, taken daily for 12 to 14 weeks. There is no official recommended intake for collagen in the UK or the US, because it is not an essential nutrient. What does have official numbers is total protein: the UK reference nutrient intake (RNI) is 0.75 g of protein per kg of body weight a day, and the US recommended dietary allowance (RDA), set by the National Academies, is 0.8 g per kg.12 For an 85 kg man that is about 64 to 68 g of protein a day, and many men who train eat more.
In practice, that gives three sensible amounts:
- 5 g a day matches the tendon study in men who trained their legs, and a 12-week study in 180 active men and women aged 18 to 30 that recorded knee discomfort during exercise, which used 5 g of FORTIGEL, the peptide in the Momentous product.7 Six of the men's tablets, or a third of a scoop of ours, reaches it.
- 10 g a day is what most single-serving powders and collagen-creatine blends are built around.
- 15 g a day matches the three muscle and body composition trials in men, and is exactly what one scoop of ours gives (13.5 g of it counting as protein on the label).
Most of these trials gave collagen after the training session or at a fixed time each day; none showed that timing changed the result, so take it whenever you will remember. Judge any collagen over three months, not three weeks. We explain timing and absorption in collagen peptides dosage and timing and the timelines in how long collagen peptides take to work.
Collagen vs whey protein for men: which builds muscle?
For building muscle, whey protein is the better supplement; collagen is a different tool. Collagen is an incomplete protein: it contains almost no tryptophan and only a little leucine, the amino acid most linked to switching on muscle protein synthesis. When older adults took 30 g of whey or 30 g of collagen twice a day for six days, whey raised muscle protein synthesis at rest and after exercise, and collagen did not raise longer-term muscle protein synthesis above baseline.8 That trial was in women aged around 69, but the amino acid gap applies to everyone. Our own lab report shows the same gap in numbers:
| Amino acid, per 18.2 g scoop | Our label | Measured by Eurofins (batch 06500062) | Why it matters |
|---|---|---|---|
| Glycine | 6.32 g | 6.64 g | The amino acid collagen is richest in; about a third of the scoop |
| Proline | 1.89 g | 2.35 g | The second building block of collagen |
| Hydroxyproline | 1.79 g | 1.74 g | Found almost only in collagen; a marker that the protein is collagen |
| Leucine | 0.41 g | 0.48 g | Low compared with whey or essential amino acid powders |
| Tryptophan | Not listed | Below 0.01 g per 100 g (limit of detection) | Essential amino acid that collagen lacks, which is why it is incomplete |
Our label (UltimateBodybalanceCollagen version 6) and Eurofins report AR-733-2026-00087334-03, July 2026, amino acids by acid hydrolysis calculated per 18.2 g serving.
So how did collagen keep up with whey in the middle-aged men's trial? That study found no significant difference between collagen and whey for fat-free mass, and the authors' own explanation is that collagen may act more on connective tissue than on muscle protein itself.3 A sensible split for a man who trains: get muscle-building protein from meals and, if you use one, a whey or essential amino acid shake; add collagen if you want the 15 g used in the trials on top. Collagen counts towards your daily protein, but it should not be the only protein supplement you rely on.
Collagen and creatine for men: can you take them together?
Yes. Collagen and creatine do different jobs and there is no known interaction, so you can stir them into the same drink. Creatine monohydrate is the supplement with the authorised claim for training: it increases physical performance in successive bursts of short-term, high intensity exercise, with the effect seen at 3 g a day. Collagen has no authorised claim. That makes them complementary rather than alternatives.
Combined products exist: the Vital Proteins blend in our table gives 10 g of collagen and 5 g of creatine for $1.39 a serving. Mixing your own lets you choose 15 g of collagen and 3 to 5 g of creatine, which is closer to the doses each was studied at. We cover the pairing, and which of the two to choose if you only want one, in creatine and collagen: can you take them together?
Best collagen for men over 50
For men over 50, the trial that fits best is the one in 53 men with an average age of 72 and age-related muscle loss (sarcopenia), who took 15 g of BODYBALANCE collagen a day with resistance training three times a week for 12 weeks.1 Both groups gained, and the collagen group gained more fat-free mass and leg strength than the placebo group. It is one trial, run with the collagen supplier, and the training was supervised; the lesson is that collagen was an addition to lifting, not a replacement for it.
Protein needs do not fall with age, and ageing appears to blunt the muscle response to protein and exercise.8 The UK RNI (0.75 g per kg) and US RDA (0.8 g per kg) are set for the general adult population. A man over 50 is usually better served by making sure each meal carries a good portion of complete protein (meat, fish, eggs, dairy, beans or whey), then adding collagen if he wants the trial amount. If tablets are hard to swallow, an unflavoured powder stirred into coffee, tea or porridge is the easiest form to keep up.
"For men over 50 I keep it practical: protein at every meal, two or three strength sessions a week, and enough sleep to recover from them. Collagen can sit on top of that routine as a convenient extra. What I do not want is someone taking a supplement and skipping the training, because in the studies it was the two together that counted."
Sarah Law, Naturopathic Nutritionist | Optimised Female
Vitamin C, biotin and herbal extras in men's collagen
You do not need vitamin C in the same tub as your collagen, but you do need enough vitamin C in your diet, because vitamin C is the nutrient with the authorised claim: it contributes to normal collagen formation for the normal function of blood vessels, bones, cartilage, gums, skin and teeth. Men's reference amounts differ slightly from women's in the US:
| Reference | Amount for adult men | Who sets it |
|---|---|---|
| Vitamin C, UK NHS guidance | 40 mg a day; more than 1,000 mg a day could cause stomach pain, diarrhoea and flatulence | NHS |
| Vitamin C, UK and EU label reference (NRV) | 80 mg | Retained Regulation (EU) 1169/2011 |
| Vitamin C, US RDA and upper limit (UL) | 90 mg (smokers need 35 mg more); UL 2,000 mg | National Academies, listed by NIH ODS |
| Biotin, NRV and US adequate intake (AI) | NRV 50 mcg; US AI 30 mcg | Regulation (EU) 1169/2011; NIH ODS |
| Ultimate Collagen Peptides, per scoop | 200 mg vitamin C (250% NRV); no biotin | Our printed label |
One small trial in eight healthy men gave 15 g of vitamin C-enriched gelatin an hour before six minutes of skipping, and a blood marker of collagen formation doubled,9 but that tested gelatin and a lab setting, not a daily collagen powder. More on the pairing in collagen with vitamin C.
Two extras are common in collagen sold to men:
- Biotin. Usually added for hair. Most men get enough from food, and high doses can distort some blood tests, including thyroid and heart tests, so tell your doctor if you take it.14 The men's tablets we read give 900 mcg, 30 times the US AI.
- Fo-ti (he shou wu, Polygonum multiflorum). A traditional Chinese herb sold for hair and ageing. It has been linked to cases of liver injury in published case series,11 so ask a pharmacist first, especially if you have a liver condition or take other medicines.
On skin: almost all of the skin trials were run in women. A 2021 meta-analysis of 19 trials had 1,125 participants, 95% of them women,10 so there is far less data on collagen and men's skin.
What to look for on a collagen label
A good collagen label tells you five things in plain numbers. If any is missing, compare it with a product that states it.
- Grams of collagen per serving, as its own line in the facts panel. For the training trials in men, aim for 10 to 15 g.
- "Hydrolysed" or "collagen peptides" in the ingredients. Plain gelatine is the same protein but sets in cold liquid.
- The source: bovine, marine (fish), chicken or eggshell membrane. Allergy and diet depend on it.
- Serving size and servings per pack, so you can work out price per serving and per 10 g of collagen.
- Extras and their doses: creatine, vitamin C, biotin, herbal extracts. A long list of extras usually means less room for collagen.
- Testing: a published certificate of analysis with heavy metals (lead, cadmium, mercury, arsenic) and microbiology from an independent lab, or a sport certification if you are tested.
A trademarked peptide name (BODYBALANCE, FORTIGEL, TENDOFORTE, Peptan) tells you which supplier's collagen is inside, which helps you match a product to the trial that used it. The three muscle trials in men in our table all used BODYBALANCE. More on sources in marine vs bovine vs vegan collagen.
How we check our collagen
Every batch of our collagen has a certificate of analysis, and the independent results are published in the lab library on our testing page.
The figures come from Eurofins report AR-733-2026-00087334-03 (July 2026), which also measured leucine at 0.48 g against 0.41 g on the label and nickel below 0.10 mg/kg. Ultimate Collagen Peptides is made in the UK under BRC standards from BODYBALANCE hydrolysed bovine collagen, and the label states 15 g per serving. Customers rate it 4.8 out of 5 across 196 verified ratings.
Where Love Life Supplements is not the best choice
We sell the collagen on this page, so here is where another product may suit you better.
- Lowest price per gram. Nutravita's bovine powder (£0.38 per 10 g) and Vital Proteins' unflavoured powder ($0.96 per 10 g) cost less than ours (£1.09) if you do not need vitamin C or UC-II in the scoop.
- Drug-tested athletes. If you compete under anti-doping rules, choose a product with NSF Certified for Sport or Informed Sport, such as Momentous. Ours is batch tested by Eurofins but does not carry a sport certification.
- One tub for collagen and creatine. If you want both in one scoop and 10 g of collagen is enough, a combined product is simpler than two tubs.
- Fish instead of beef. Ours is bovine with chicken-derived UC-II. Our own Marine Collagen Skin Boost+ was out of stock when we checked on 5 November 2026.
- US readers. Ultimate Collagen Peptides is sold on our UK store only and is not available from our US store.
- Vegetarian or vegan. No collagen is suitable. Look for protein-rich foods and vitamin C instead.
Frequently asked questions
Should men take collagen?
Men can take collagen, and most collagen trials that measured muscle and tendons recruited men. It is optional: collagen is a protein your body also makes from the protein you eat. It is most worth considering if you train with weights and want an easy extra 10 to 15 g of protein a day, the amount used in the trials in men.
What is the best collagen for men?
A hydrolysed collagen peptide powder that states at least 10 g of collagen per serving, because the trials in men used 15 g a day with training and only powders reach that in one serving. Check the price per 10 g of collagen and any extras. Ours gives 15 g plus 200 mg of vitamin C a scoop for £1.63 a day on our UK store.
How much collagen should a man take per day?
The trials in men used 5 g a day in tendon and knee studies and 15 g a day in the muscle and body composition studies, taken daily for 12 to 14 weeks alongside training. There is no official intake for collagen in the UK or US, so follow the label and judge it over three months.
Is collagen or whey protein better for men?
For muscle protein, whey. Collagen contains almost no tryptophan and little leucine, and in a direct comparison whey raised muscle protein synthesis while collagen did not. Collagen is studied for connective tissue such as tendons, so many men who train use whey or meals for muscle and collagen as an extra.
Can men take collagen with creatine?
Yes. They do different jobs and there is no known interaction, so many men stir 3 to 5 g of creatine monohydrate into the same drink as their collagen. Some products combine them, but check that the collagen dose is still around 10 to 15 g. More in creatine and collagen.
Are there side effects of collagen for men?
Collagen peptides are generally well tolerated in trials; the usual complaints are fullness or a mild stomach upset. Check the source if you have a food allergy, and speak to your GP first if you have kidney disease, have been told to limit protein or take regular medication. More in is there a downside to taking collagen peptides?
About the Reviewer: Sarah Law, Dip CNM
Sarah Law is a Certified Naturopathic Nutritionist and Functional Practitioner specialising in hormonal health, gut health, and evidence-based nutrition. She holds a Diploma in Naturopathic Nutrition from the College of Naturopathic Medicine (CNM, London) and is a Certified Functional Health Coach. Sarah combines naturopathic principles with modern functional nutrition science to help her clients make informed health decisions.
About the Author: Ben Law
Ben Law is the founder of Love Life Supplements and host of the Optimised Health Show. He is a qualified Advanced Dietary Supplement Advisor and Primal Blueprint Certified Expert, and has spent 14 years building transparent, research-led formulations. He wrote this guide from the published trials, regulators' own publications, each brand's own product pages and labels, and our own label and certificate data.
Vital Proteins, Momentous, Youtheory, Nutravita, BODYBALANCE, FORTIGEL, TENDOFORTE, Peptan and UC-II are trademarks of their respective owners; the competitor brands are not affiliated with Love Life Supplements. Learn more about Ben.
References
- 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. PMID 26353786 (corrigendum 2025, PMID 40859798)
- Kirmse M, Oertzen-Hagemann V, de Marées M, Bloch W, Platen P. Prolonged Collagen Peptide Supplementation and Resistance Exercise Training Affects Body Composition in Recreationally Active Men. Nutrients. 2019;11(5):1154. PMID 31126103
- Zdzieblik D, Jendricke P, Oesser S, Gollhofer A, König D. The Influence of Specific Bioactive Collagen Peptides on Body Composition and Muscle Strength in Middle-Aged, Untrained Men: A Randomized Controlled Trial. Int J Environ Res Public Health. 2021;18(9):4837. PMID 33946565
- Jerger S, Centner C, Lauber B, et al. Specific collagen peptides increase adaptions of patellar tendon morphology following 14-weeks of high-load resistance training: A randomized-controlled trial. Eur J Sport Sci. 2023;23(12):2329-2339. PMID 37424319
- Kirmse M, Lottmann TM, Volk NR, et al. Collagen Peptide Supplementation during Training Does Not Further Increase Connective Tissue Protein Synthesis Rates. Med Sci Sports Exerc. 2024;56(12):2296-2304. PMID 39086044
- Bischof K, Moitzi AM, Stafilidis S, et al. Impact of Collagen Peptide Supplementation in Combination with Long-Term Physical Training on Strength, Musculotendinous Remodeling, Functional Recovery, and Body Composition in Healthy Adults: A Systematic Review with Meta-analysis. Sports Med. 2024;54(11):2865-2888. PMID 39060741
- Zdzieblik D, Brame J, Oesser S, Gollhofer A, König D. The Influence of Specific Bioactive Collagen Peptides on Knee Joint Discomfort in Young Physically Active Adults: A Randomized Controlled Trial. Nutrients. 2021;13(2):523. PMID 33562729
- Oikawa SY, Kamal MJ, Webb EK, et al. Whey protein but not collagen peptides stimulate acute and longer-term muscle protein synthesis with and without resistance exercise in healthy older women: a randomized controlled trial. Am J Clin Nutr. 2020;111(3):708-718. PMID 31919527
- Shaw G, Lee-Barthel A, Ross ML, et al. Vitamin C-enriched gelatin supplementation before intermittent activity augments collagen synthesis. Am J Clin Nutr. 2017;105(1):136-143. PMID 27852613
- 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. PMID 33742704
- Liu Y, Wang W, Sun M, et al. Polygonum multiflorum-Induced Liver Injury: Clinical Characteristics, Risk Factors, Material Basis, Action Mechanism and Current Challenges. Front Pharmacol. 2019;10:1467. PMID 31920657
- Institute of Medicine. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. National Academies Press; 2005. nap.nationalacademies.org
- NHS. Vitamin C. nhs.uk; NIH Office of Dietary Supplements. Vitamin C: Fact Sheet for Health Professionals. ods.od.nih.gov
- NIH Office of Dietary Supplements. Biotin: Fact Sheet for Health Professionals. ods.od.nih.gov
- Regulation (EU) No 1169/2011, Annex XIII (nutrient reference values), as retained in Great Britain. legislation.gov.uk; Great Britain nutrition and health claims (NHC) register (vitamin C and creatine entries). gov.uk
Product facts: Vital Proteins Collagen Peptides, Vital Proteins Advanced Collagen Peptides + Creatine, Momentous Collagen Peptides, Youtheory Men's Collagen Tablets, Nutravita Premium Gold Standard Bovine Collagen Powder, read 5 November 2026.
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