Anti-aging foods and supplements: do they work?
“Is taking collagen good for my skin?” I hear it often. Food and supplements are something you do every day, so expectations run high. Let me lay out how far the research actually goes.
The short answer
Observational research links diet to skin aging, and meta-analyses find oral collagen modestly improves hydration and elasticity. I see the size of those effects as smaller than sunscreen or not smoking. In a study of 4,025 American women, those eating more vitamin C were less likely to look wrinkled (odds ratio 0.89). For collagen, an analysis of 26 randomised trials with 1,721 people found hydration and elasticity better than placebo, though the authors flagged study bias. At Miso Clinic, 4F Bombom Building, 125 Dongdeok-ro, Jung-gu, Daegu (Exit 1, Kyungpook Nat'l Univ. Hospital Station), +82-53-428-2700, I start with sunscreen and daily habits.
Which foods slow skin aging?
A 2007 study of 4,025 American women found higher vitamin C intake went with less wrinkled appearance (odds ratio 0.89) and less age-related dryness (0.93), and higher linoleic acid intake with less dryness (0.75). More fat and carbohydrate went with more wrinkling.
It's a one-time observational study, so it can't separate the food from the other habits of people who eat that way. Some authors worked for a food company. I found no randomised trial showing any single food reduced wrinkles.
So rather than “eat this one thing”, I suggest plenty of vegetables and fruit, and less sugary and fatty food.
Do collagen supplements work?
| Analysis | Size | Result | Caution |
|---|---|---|---|
| Pu 2023 | 26 randomised trials, 1,721 people | Hydration and elasticity better than placebo | Bias noted; larger trials needed |
| de Miranda 2021 | 19 studies, 1,125 people (95% women) | Hydration, elasticity and wrinkles improved over 90 days | Products and doses varied |
Both point the same way. But many trials were funded by product makers, and products differ in content and dose. These data can't tell you which product or how much.
Oral collagen is digested before it's absorbed; it doesn't travel to the skin intact. So I say there's little harm in taking it, but don't expect it to replace treatment.
Is there something to do before diet?
Yes. People who used sunscreen daily showed 24% less skin aging over 4.5 years (903-person randomised trial). In a study of 186 pairs of identical twins, the twin who smoked looked older.
Food and supplements come after those two. Reverse the order and you spend more for less.
→ More: When does skin aging start?
Is vitamin C better eaten or applied?
Dietary vitamin C was linked to skin appearance in the observational study above. Topical vitamin C varies in strength and stability between products, so a blanket comparison is hard. I found no trial comparing the two directly.
I also found no evidence that people already eating enough get better skin by adding a supplement.
What should I watch for when choosing supplements?
Claims like “skin regeneration” or “wrinkles disappear” often aren't allowed even for health supplements. If you see them up front, think twice.
If you take medication or are pregnant or breastfeeding, check with your doctor before adding a supplement.
Anti-aging foods and supplements FAQ
How much collagen do I need to take?
Products and amounts varied across studies, so I can't give a set dose. Most trials in the analyses ran about 8 to 12 weeks.
Does drinking more water improve my skin?
I found no evidence that drinking more water reduces wrinkles. Drinking enough not to feel thirsty is enough.
Will cutting sugar slow skin aging?
Diets high in sugar have been linked to wrinkles in observational data, but I found no trial measuring the change after cutting sugar.
Where can I get a skin aging consultation in Daegu?
At Miso Clinic, 4F Bombom Building, 125 Dongdeok-ro, Jung-gu, Daegu (Exit 1, Kyungpook Nat'l Univ. Hospital Station), +82-53-428-2700. Weekdays 11:00–19:00, Saturday 10:00–16:00, closed Sundays and public holidays.
Read next
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Related care: Thin, dry skin · Skin barrier
Who wrote this
Written and reviewed by Lee Chi-Hak, MD, director of Miso Clinic, Daegu. The treatment standards and injection design set out here are the ones we use in practice.
| Medical director | Lee Chi-Hak, MD |
|---|---|
| Address | 4F Bombom Building, 125 Dongdeok-ro, Jung-gu, Daegu, South Korea · Exit 1, Kyungpook National University Hospital Station |
| Phone | +82-53-428-2700 |
| Hours | Weekdays 11:00–19:00 (lunch 13:00–14:00) / Saturday 10:00–16:00 (no lunch break) / Closed Sundays and public holidays |
| Columns | All clinical columns |
| Reference library | All booster and device references |
References
- Diet and skin-aging appearance — Cosgrove MC et al. Dietary nutrient intakes and skin-aging appearance among middle-aged American women. Am J Clin Nutr 2007;86(4):1225-31. PMID 17921406. Cross-sectional, 4,025 women.
- Meta-analysis of oral collagen — Pu SY et al. Effects of Oral Collagen for Skin Anti-Aging. Nutrients 2023;15(9):2080. PMID 37432180. 26 randomised trials, 1,721 people.
- Meta-analysis of oral collagen — de Miranda RB et al. Int J Dermatol 2021;60(12):1449-61. PMID 33742704. 19 studies, 1,125 people.
- Randomised sunscreen trial — Hughes MCB et al. Ann Intern Med 2013;158(11):781-90. PMID 23732711. 903 people, 4.5 years.
- Twin study — Guyuron B et al. Plast Reconstr Surg 2009;123(4):1321-31. PMID 19337100. 186 pairs.
- Korean medical advertising law — Korean Medical Service Act Article 56(2) (no treatment testimonials, no comparisons with other clinics, no superlatives). This is why this column carries no prices, reviews or before-and-after photos.
- Miso Clinic practice guidelines — dissolvable hyaluronic acid filler is considered first for hollowing and lifting first for sagging; boosters are chosen in the order concern, then layer, then product; no RF treatment that day if there are metal or electronic implants, pregnancy or skin inflammation.
Everything in this column is general information and does not replace medical diagnosis or treatment. Effects and side effects vary with individual skin condition, age and underlying illness, and the same result is not guaranteed for everyone. Any decision to proceed should be made in an in-person consultation with a physician.