Guide · Collagen drinks
Collagen drinks the evidence, the dose, the sugar, and how to choose
Collagen drinks fill pharmacy and supermarket shelves in Singapore, from small daily shots to powders and jellies. Here is what the trials actually found, how to read the grams and the sugar on the label, and what a drink can and cannot do for your skin.
Quick answer
- A collagen drink contains hydrolysed collagen peptides, usually from fish, cows or pigs, which are digested into amino acids and small peptides. The evidence that this improves skin is mixed: a 2021 meta-analysis of 19 trials found better hydration, elasticity and wrinkles, but a 2025 meta-analysis of 23 trials found no effect in the high-quality or non-industry-funded studies.
- If you try one, the dose and duration matter more than the packaging. Trials commonly gave a few grams of collagen a day for 8 to 12 weeks; in one placebo-controlled trial, 2.5 g a day improved skin elasticity as much as 5 g, so a bigger dose is not clearly better.
- Check the sugar. The WHO advises keeping free sugars below 10% of daily energy, and ideally below about 25 g a day. Singapore's Nutri-Grade mark grades drinks A to D by sugar and saturated fat per 100 mL, and grade A also requires no sweeteners.
- Health supplements in Singapore are not evaluated or approved by HSA before sale. A drink will not lift sagging skin or fill hollows; treatments that act on the skin's own collagen, such as SKINTIGHT and SKINLIFT at SkinRev Lab, or doctor-led options at IN Eternity Clinic, target that directly.
What is in it
What is actually in a collagen drink
Most collagen drinks sold in Singapore come in three forms: small ready-to-drink bottles taken daily, powders stirred into water or coffee, and jellies or sachets. The main ingredient is hydrolysed collagen, also called collagen peptides: collagen from fish skin or scales, cow hide or pig skin, broken into shorter pieces so it dissolves and digests easily.
Many products add vitamin C, hyaluronic acid, elastin, ceramides or fruit extracts, plus sugar, fruit juice or sweeteners to cover the taste. Those extras change the cost and the sugar more than the science.
In the gut, collagen is broken down into amino acids and small peptides, which the body distributes wherever it needs protein. It does not travel to the face as collagen and slot into place. Some small peptides are absorbed and may act as signals to skin cells, which is the theory behind the drinks, but that is not the same as delivering collagen to your skin.
Evidence
What the trials show, and why reviews disagree
A 2021 meta-analysis in the International Journal of Dermatology pooled 19 randomised, double-blind trials with 1,125 participants, mostly women aged 20 to 70. Compared with placebo, hydrolysed collagen improved skin hydration, elasticity and wrinkles, and the authors concluded that about 90 days of use reduced signs of skin ageing.
A 2025 meta-analysis in the American Journal of Medicine pooled 23 trials with 1,474 participants and found the same overall improvement, but then split the trials by who paid for them and by quality. Studies without funding from companies showed no effect on hydration, elasticity or wrinkles, and neither did the high-quality studies. The authors concluded there is currently no clinical evidence to support collagen supplements for preventing or treating skin ageing.
Read together, the honest summary is that any benefit is likely small and uncertain, and that much of the positive evidence comes from studies funded by manufacturers. Harvard's Nutrition Source makes a similar point: some trials report better elasticity, but human research is still limited.
Dose
How much collagen, and for how long
Doses in the trials were modest. In one widely cited double-blind trial, 69 women aged 35 to 55 took 2.5 g or 5 g of collagen peptides or a placebo daily for eight weeks. Skin elasticity improved in both collagen groups compared with placebo, with no clear advantage for the higher dose, and no side effects were noted. Moisture showed a trend that did not reach significance.
Most trials ran for 8 to 12 weeks, so judge a product over at least that long, and compare photographs taken weeks apart rather than the mirror. Any effect is likely to fade after you stop.
| On the label | What to look for |
|---|---|
| Collagen per serving | The grams of collagen peptides, not the total weight of the drink; trials commonly used a few grams a day |
| Source | Fish, bovine or porcine; matters for allergies and for religious or dietary choices |
| Sugar per serving and per 100 mL | Lower is better; check the Nutri-Grade mark if there is one |
| Sweeteners | Common in low-sugar drinks; grade A on Nutri-Grade requires none |
| Other actives | Vitamin C, hyaluronic acid and others add cost; evidence for them in drinks is limited |
| Cost per gram of collagen | Divide the price by the grams of collagen you get, so small shots and powders can be compared fairly |
Sugar
The sugar in collagen drinks
The World Health Organization recommends keeping free sugars below 10% of total daily energy, and suggests that below 5%, roughly 25 g or six teaspoons a day, gives further benefit. A daily drink is a daily habit, so its sugar adds up over a 12-week course.
Singapore's Nutri-Grade mark grades drinks by sugar and saturated fat per 100 mL. Grade A is 1 g of sugar or less with no sweeteners, B is above 1 g to 5 g, C is above 5 g to 10 g, and D is above 10 g. The mark must be shown for C and D drinks and is optional for A and B, so a missing label does not always mean a low-sugar drink.
Do the sum per bottle as well as per 100 mL. A 50 mL shot at 10 g of sugar per 100 mL contains 5 g of sugar, a fifth of the WHO's lower daily level, before anything else you eat or drink. If you have diabetes or are watching your weight, a powder with no added sugar is usually the easier choice.
| Nutri-Grade | Sugar per 100 mL | Saturated fat per 100 mL |
|---|---|---|
| A | 1 g or less, and no sweeteners | 0.7 g or less |
| B | Above 1 g to 5 g | Above 0.7 g to 1.2 g |
| C | Above 5 g to 10 g | Above 1.2 g to 2.8 g |
| D | Above 10 g | Above 2.8 g |
Rules
How collagen supplements are regulated in Singapore
The Health Sciences Authority states that health supplements do not require approval and are not evaluated by HSA before they can be sold. Dealers, from manufacturers to retailers, are responsible for their safety and quality, and their labels and advertisements must not be false or misleading or claim to treat or prevent disease.
So a skin claim on a collagen drink is the seller's claim, not an official endorsement. Look for products that state the collagen content clearly and come from a seller you trust, and be wary of promises such as younger skin in days.
Choosing
How to choose a collagen drink, if you want one
- Start with the grams of collagen per serving, and compare the cost per gram rather than the cost per box.
- Pick the lowest sugar you will happily drink, and check whether sweeteners are used.
- Check the source if you have a fish allergy or avoid beef or pork; collagen is always animal-derived, so vegan collagen boosters contain other ingredients, not collagen.
- Ask your doctor first if you are pregnant or breastfeeding, have kidney disease, or take regular medicines.
- Give it 8 to 12 weeks, take photographs in the same light at the start and end, and stop if you see no difference.
- Treat it as one small part of skin care; daily sunscreen, enough sleep, enough protein and not smoking matter more.
Expectations
What a collagen drink can and cannot do
Even in the positive trials, the evidence points to a small improvement in hydration and elasticity that you may or may not notice. A drink cannot direct collagen to your face, so it will not lift jowls, fill hollow cheeks or temples, smooth deep lines or fade pigment. Those changes come from structure under the skin, which needs a treatment that reaches it.
It is also not a substitute for protein in your diet. Collagen is an incomplete protein, so it should not replace fish, eggs, tofu, meat or dairy at meals.
Acting on collagen directly
Treatments that prompt your own collagen
If firmness and fine lines are the real goal, treatments that send a signal to the dermis have more direct evidence than a drink. At SkinRev Lab, a non-invasive aesthetic centre at #B1-28 CityLink Mall by City Hall MRT, SKINTIGHT uses Alma PrimeX microplasma to prompt collagen renewal over the following weeks (S$588 per zone), and SKINLIFT uses focused ultrasound for early jowls and a softening jawline (S$888 for the face). The needle-free Rejuran PDRN Facial (S$128 to S$348) supports skin quality across a course. All prices are before GST.
Deeper options, such as collagen biostimulators, RF microneedling and HIFU, are performed by Dr Sin Yong, SkinRev Lab's Medical Adviser, at IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, beside Orchard MRT, and priced at consultation by the clinic.
Sources
References & sources
- Myung SK, Park Y. Effects of collagen supplements on skin aging: a systematic review and meta-analysis of randomized controlled trials. Am J Med. 2025;138(9):1264-1277.
- 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.
- Proksch E, Segger D, Degwert J, et al. Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study. Skin Pharmacol Physiol. 2014;27(1):47-55.
- Harvard T.H. Chan School of Public Health. Collagen. The Nutrition Source.
- World Health Organization. WHO calls on countries to reduce sugars intake among adults and children. 4 March 2015.
- Health Promotion Board. Nutri-Grade mark for Nutri-Grade beverages: usage guide. Singapore, updated 30 December 2021.
- Health Sciences Authority. How health supplements are regulated by HSA. Singapore, 2026.
Common questions
Your questions,
answered
Do collagen drinks really work?
The evidence is mixed. A 2021 meta-analysis of 19 trials found improved hydration, elasticity and wrinkles, but a 2025 meta-analysis of 23 trials found no effect in high-quality or independently funded studies. Any benefit is likely small.
How much collagen should I take a day?
Trials commonly used a few grams a day. In one placebo-controlled trial, 2.5 g a day improved elasticity as much as 5 g, so a higher dose is not clearly better. Check the grams of collagen per serving on the label.
How long does it take for collagen drinks to work?
Most trials ran for 8 to 12 weeks before measuring change. Give a product at least that long, compare photographs taken weeks apart, and expect any effect to fade after you stop.
Are collagen drinks high in sugar?
Some are. Check sugar per serving and per 100 mL, and the Nutri-Grade mark if shown: A is 1 g or less per 100 mL with no sweeteners, D is above 10 g. The WHO suggests ideally keeping free sugars below about 25 g a day.
Is collagen powder better than a collagen drink?
Neither form has been shown to work better. Powders often contain more collagen per serving and less sugar for the price, while bottled shots are convenient. Compare the grams of collagen, the sugar and the cost per gram.
Which is better, fish or bovine collagen?
There is no good evidence that one source works better for skin. Choose based on allergies, religious or dietary preferences, taste and the collagen content per serving.
Are collagen drinks approved by HSA?
No. HSA states that health supplements do not require approval and are not evaluated before sale. Sellers are responsible for safety and quality and must not claim their products treat or prevent disease.
Can collagen drinks replace aesthetic treatments?
No. A drink cannot direct collagen to your face, so it will not lift sagging skin or fill hollows. Treatments that reach the dermis, such as microplasma, focused ultrasound or biostimulators, act on your own collagen more directly.