Do Collagen Supplements Work? What the Trials Say About Skin, Joints and Muscle
Collagen powders and drinks are everywhere — on Instagram, in pharmacies, in imported tubs at premium prices. Here is what the research actually shows for skin, joint pain and muscle, why who funded the study changes the answer, and what to spend the money on instead.
By Taha Raza
Published
Collagen is the main structural protein in skin, tendons, ligaments and bone, so the pitch sounds logical: eat collagen, get more collagen. But your body breaks collagen powder down into amino acids and small peptides, just like any other protein, and decides for itself where to use them. The question is whether that makes a measurable difference.
Does collagen improve skin?
This is where the marketing is loudest and the evidence weakest. A 2025 meta-analysis in the American Journal of Medicine looked at 23 randomised trials with 1,474 participants. Pooled together, collagen supplements seemed to improve skin hydration, elasticity and wrinkles. Then the authors split the trials by funding source: studies paid for by supplement companies showed benefits, while studies without that funding showed no effect on hydration, elasticity or wrinkles. High-quality studies also found no significant effect. Their conclusion: there is currently no clinical evidence to support collagen for preventing or treating skin ageing.
| Habit | Why it matters |
|---|---|
| Daily sunscreen and shade | UV light is the main cause of wrinkles and uneven skin on exposed areas |
| Not smoking or vaping | Smoking speeds up skin ageing — see our smoking and sheesha guide |
| Enough protein and vitamin C | Your body needs both to build its own collagen |
| Sleep and a stable weight | Repeated big weight swings stretch and loosen skin |
| Collagen powder | Benefits disappeared in independent and high-quality trials |
Does collagen help joint pain?
This is the most promising use. A 2024 meta-analysis in Osteoarthritis and Cartilage combined 35 trials with 3,165 people with osteoarthritis. Collagen products gave a small-to-moderate reduction in pain and an improvement in function compared with control, with no extra side effects. 'Small-to-moderate' is the key phrase: the effect is real but modest, and the trials used different types of collagen, including undenatured type II collagen at very small doses and hydrolysed collagen at around 10 g a day.
For knee arthritis, exercise and weight loss have stronger evidence and much larger effects — see our knee pain guide. Collagen is a reasonable add-on if you want to try it for a few months, not a replacement for strengthening the muscles around the joint.
Does collagen build muscle?
Not well. Collagen protein is low in leucine, the amino acid that switches on muscle building, and contains almost no tryptophan, so it is an incomplete protein. In a 2020 trial in the American Journal of Clinical Nutrition, 22 healthy women aged around 69 took 30 g of either whey or collagen twice a day for six days while doing resistance exercise. Whey increased muscle protein synthesis both at rest and after exercise; collagen did not.
The study most often quoted by collagen brands is a 2015 trial in 53 older men with sarcopenia: after 12 weeks of resistance training, those taking 15 g of collagen a day gained 4.2 kg of fat-free mass against 2.9 kg on placebo. But the placebo contained no protein, so the trial shows that adding some protein helped — not that collagen beats other proteins. For muscle, whey, milk, eggs, chicken, fish and dahi are better value per gram.
Does collagen help tendons and injuries?
The research is early. In a small 2017 study of eight men, 15 g of vitamin C-enriched gelatin taken an hour before short bouts of rope-skipping doubled a blood marker of collagen production compared with placebo. That suggests a possible role in tendon and ligament health, but it measured a blood marker, not fewer injuries. It is an interesting lead, not a proven treatment.
Is collagen worth the money in Pakistan?
| Your goal | Collagen | Better first choice |
|---|---|---|
| Younger-looking skin | No effect in independent trials | Sunscreen, no smoking, enough protein |
| Knee or joint pain | Small-to-moderate benefit | Strength training and weight loss; collagen as an add-on |
| Building muscle | Poor-quality protein | Whey, eggs, chicken, dahi, daal — see our whey guide |
| Hair and nails | Little good evidence | Check iron, vitamin D and thyroid if hair is shedding |
| Tendon recovery | Early, promising lab evidence | Gradual loading with a physiotherapist |
- Collagen is generally safe, but check labels: many 'beauty' powders add sugar, biotin or herbal extracts. High-dose biotin can distort thyroid and heart blood tests.
- Imported tubs are expensive and fakes are common in Pakistan — buy only from authorised sellers.
- Collagen counts towards your daily protein, but only partly; do not rely on it to hit your protein target.
- Gelatin and slow-cooked bone broths such as paye and nihari contain collagen too, along with a lot of fat and salt in their restaurant versions.
This article is general information, not medical advice. If you have kidney disease, allergies to fish, eggs or bovine products, or take regular medication, check with your doctor or pharmacist before starting any supplement.
Frequently Asked Questions
Do collagen supplements really work for skin?
The best evidence says no. A 2025 meta-analysis of 23 trials found apparent benefits only in studies funded by supplement companies and in lower-quality studies; independent and high-quality trials showed no effect on hydration, elasticity or wrinkles.
Is collagen good for knee pain?
It may help a little. A 2024 meta-analysis of 35 trials in people with osteoarthritis found a small-to-moderate reduction in pain and better function. Strength training and weight loss have larger effects, so use collagen as an add-on rather than the main treatment.
Is collagen better than whey protein for muscle?
No. Collagen is low in leucine and missing tryptophan. In a 2020 trial in older women, whey increased muscle protein synthesis while the same amount of collagen did not. For muscle, whey or protein-rich food is the better choice.
How much collagen should I take?
Trials have used about 2.5–15 g a day of hydrolysed collagen, and much smaller doses of undenatured type II collagen for joints. If you try it, give it two to three months and judge the result honestly; there is no benefit to taking more.
Does collagen help hair and nails grow?
There is little good evidence. Hair shedding is more often linked to low iron, thyroid problems, crash dieting or stress, so get those checked first.
Are collagen supplements safe?
Generally yes for healthy adults. Check the label for added sugar, biotin and herbal extracts, avoid it if you are allergic to its source (fish or bovine), and buy from authorised sellers, as fake imported supplements are common in Pakistan.
Sources
- Myung SK, Park Y. Effects of collagen supplements on skin aging: a systematic review and meta-analysis of randomized controlled trials. American Journal of Medicine, 2025
- Liang CW et al. Efficacy and safety of collagen derivatives for osteoarthritis: a trial sequential meta-analysis. Osteoarthritis and Cartilage, 2024
- Oikawa SY 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. American Journal of Clinical Nutrition, 2020
- Zdzieblik D et al. Collagen peptide supplementation in combination with resistance training improves body composition and increases muscle strength in elderly sarcopenic men: a randomised controlled trial. British Journal of Nutrition, 2015
- Shaw G et al. Vitamin C-enriched gelatin supplementation before intermittent activity augments collagen synthesis. American Journal of Clinical Nutrition, 2017
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