Reviewed on [insert review date] · Next review: November 2027.

The best vitamins for skin are vitamin C, which your skin needs to make collagen, and zinc, with collagen peptides the most popular addition. Good skin starts with the basics, though, and daily sunscreen has good trial evidence for slowing skin ageing. Whether your skin feels dry, dull or simply tired, small steady habits make the biggest difference.

It helps to know what the research can and can't promise. Skin cells depend on vitamin C to make collagen [1]. Pooled together, collagen trials show better hydration and elasticity, but a 2025 review found no clear benefit in trials without company funding [2]. And in a Queensland trial, adults who used sunscreen every day showed 24% less skin ageing over 4.5 years [3].

In terms of our top pick, we recommend Live More You Nutraceuticals Marine Collagen. It's an unflavoured powder of Naticol marine collagen peptides made from fish skin, and it stirs easily into your morning coffee, tea or smoothie. A 270 g pack is $59.95. It's sold as a food, not a listed medicine, so it has no TGA-permitted skin indication, and the product itself hasn't been tested in a skin trial.

With more than 450 products in stock in our Hair, Skin And Nails Supplements range, we've compared eight: seven supplements and one vitamin C serum. We looked at the research behind each ingredient, who it was tested in, regulatory status, cost per day and customer reviews, to help you choose with confidence.

Always read the label and follow the directions for use. If symptoms persist, talk to your healthcare professional.

What Affects Your Skin?

Your skin is your largest organ, and it reflects a lot of everyday life. In a Queensland trial, daily sunscreen slowed visible skin ageing [3]. Smoking makes skin look older, adds to wrinkles and reduces its strength and elasticity [4]. Getting enough sleep helps too [4].

What you eat matters as well. In a large US survey, women aged 40 to 74 who ate more vitamin C were less likely to have a wrinkled appearance [5]. That survey shows a link, not cause and effect, and the lead author was based at Unilever's research centre. A diet rich in vitamin C and low in refined sugars may help skin look younger [4].

Cancer Council recommends SPF50 or higher broad-spectrum, water-resistant sunscreen whenever the UV index is 3 or above [6]. Apply it 20 minutes before you go outside and reapply every two hours [6].

Can Vitamins Help Your Skin?

Vitamins can help when your diet leaves a gap, and some listed medicines are allowed to say they support skin health or collagen formation. They work best alongside sun protection and a gentle skincare routine. Most people look for skin support for one of these reasons.

For more choice, browse our Collagen Beauty Supplements For Skin and Vitamin C Supplements ranges. Your gut plays a part too: read How Gut Health Supports Glowing Skin, Hair and Nails.

Who Each Skin Supplement Helps Most

Skin research is often summed up as if every supplement works for everyone. The trials tell a more careful story, and it's worth knowing who took part before you choose.

Results describe each ingredient in the studies cited, not any product we stock. Studies and doses varied.

What Makes a Good Skin Supplement?

Skin supplements vary more than most people realise. Five things separate a well-made product in our Hair, Skin And Nails Supplements range from an average one.

1. Clear Australian regulatory status. Look for an AUST L number, which shows the product is listed with the Therapeutic Goods Administration (TGA) and made to its manufacturing standards. Listed medicines can only use skin wording from the TGA's permitted indications, such as "supports skin health". A collagen powder sold as a food carries no skin claim.
2. An ingredient matched to your situation. Vitamin C and zinc matter most if your diet runs short, while collagen peptides suit people who like a daily drink routine.
3. Named ingredients and full doses. Look for the amount of vitamin C, zinc, collagen and silicon per serve.
4. Totals under the upper limits. Several skin formulas contain zinc, vitamin A or vitamin B6, so add them up across every product you take.
5. Realistic timeframes. Skin renews slowly, and most collagen trials ran for 12 weeks [9].

Every product on our list was assessed against these criteria: dose, regulation, research and label content.

Comparing the Best Vitamins for Skin Available in Australia

These are the best vitamins for good skin we stock, from collagen and vitamin C to zinc, silica and a vitamin C serum.

1. Live More You Nutraceuticals Marine Collagen (Top Pick)

Top pick
View Live More You Nutraceuticals Marine Collagen at Mr Vitamins

Live More You Nutraceuticals Marine Collagen is our top pick for adults who want a simple, unflavoured addition to their day. It's made with Naticol hydrolysed marine collagen peptides, produced in France from fish skin, and it's mostly type I collagen.

Because the collagen is broken into small peptides, the powder disperses through hot or cold drinks without setting. Stir it into your morning coffee, a tea, a smoothie or even a soup. The 270 g pack is $59.95, and the pack gives the serve size.

This powder is sold as a food, not a listed medicine, so it has no TGA-permitted skin indication, and the product itself hasn't been tested in a skin trial. It contains fish, so it doesn't suit anyone with a fish allergy, vegetarians or vegans. If you're pregnant, breastfeeding or under medical care, speak to your health professional before use. To compare collagen sources, read Vegan, Marine & Bovine Collagen: What's the difference?.

Key details: 270 g unflavoured powder | Naticol marine collagen peptides from fish skin | Mixes into hot or cold drinks | Contains fish | Food

2. Herbs Of Gold Vitamin C 1000 Plus

Most reviewed
View Herbs Of Gold Vitamin C 1000 Plus at Mr Vitamins

Skin cells depend on vitamin C to make collagen, and skin can become fragile and slow to heal when vitamin C runs very low [1]. Supplements raise skin vitamin C mainly in people whose blood levels are below saturation [1]. Zespri International, which markets kiwifruit, part-funded that review.

Herbs Of Gold Vitamin C 1000 Plus gives you 1 g of vitamin C per tablet in a low-acid form, from calcium and sodium ascorbate. Each tablet also has 8 mg of zinc, citrus bioflavonoids, rutin and hesperidin. It supports skin health and connective tissue formation, helps maintain immune system health and has antioxidant activity.

Adults and children over 12 take 1 tablet one to three times a day with food. The 150-tablet bottle works out at about 21 to 62 cents a day. Three tablets give 3 g of vitamin C, above the 1,000 mg a day NHMRC calls a prudent limit [15], so check with your pharmacist before taking more than one a day long term. Count its zinc (8 mg per tablet) towards your 40 mg daily total [16]. It's our most reviewed skin product, with customers praising its quality and value.

Key details: 150 tablets | 1 tablet one to three times a day with food | Vitamin C 1 g, zinc 8 mg per tablet | AUST L 138884

3. Carusos Total Beauty Collagen Powder

Listed collagen formula
View Carusos Total Beauty Collagen Powder at Mr Vitamins

Collagen peptides are small pieces of collagen protein. In 69 women aged 35 to 55, 2.5 g or 5 g a day for 8 weeks improved skin elasticity compared with placebo [7]. Skin moisture didn't differ significantly from placebo in that trial. Two authors were affiliated with the Collagen Research Institute in Kiel, Germany.

Each 5 g scoop gives you 2.5 g of VERISOL B collagen peptides, plus 100 mg of vitamin C, 2.5 mg of biotin and 350 mg of silicon. It helps enhance skin firmness and elasticity, supports collagen formation and skin integrity, and helps reduce nail brittleness. Adults mix 1 scoop into 100 mL of water or a drink once a day. It's forest berry flavoured, and the 100 g tub gives you 20 serves at about $1.40 a day. It contains sulfites and phenylalanine.

It contains biotin, which can distort some blood test results, so tell your doctor you take it.

Key details: 100 g powder (20 serves) | 1 scoop (5 g) a day | Collagen peptides 2.5 g, vitamin C 100 mg, silicon 350 mg | Contains sulfites and phenylalanine | AUST L 322668

4. Nutrivital Non-Acidic Vitamin C Complete

Gentle vitamin C
View Nutrivital Non-Acidic Vitamin C Complete at Mr Vitamins

If acidic vitamin C upsets your stomach, a buffered form can be a kinder choice. Nutrivital Non-Acidic Vitamin C Complete uses calcium ascorbate, giving about 827 mg of vitamin C per modified-release tablet, with citrus bioflavonoids, hesperidin and acerola.

It helps maintain collagen formation and skin health, supports wound healing and has antioxidant activity. Adults take one to two tablets a day with water. The 180-tablet bottle works out at about 34 to 67 cents a day. Two tablets give about 1,650 mg of vitamin C, above the 1,000 mg prudent limit [15], so check with your pharmacist before taking two a day long term. It's for adults only, and it contains soya bean products.

Key details: 180 tablets | 1 to 2 tablets a day | Vitamin C about 827 mg per tablet, non-acidic | Contains soya | AUST L 261475

5. Thompsons Organic Zinc

Simple zinc
View Thompsons Organic Zinc at Mr Vitamins

Zinc is a mineral your skin relies on for repair. Thompsons Organic Zinc keeps things simple: one small tablet gives you 15 mg of zinc from zinc gluconate, with nothing else active.

It helps maintain skin health, supports skin repair and wound healing, and supports immune system health. Adults take one tablet a day with food. The 180-tablet bottle lasts six months, at about 17 cents a day. Add the 15 mg to the zinc from your diet and other supplements, and keep your total under 40 mg a day [16].

Two reviewers had only just started and couldn't yet say how it was going.

Key details: 180 tablets (6 months) | 1 tablet a day with food | Zinc 15 mg | AUST L 411023

6. Blackmores Bio Zinc

Higher-strength zinc
View Blackmores Bio Zinc at Mr Vitamins

Blackmores Bio Zinc is a one-a-day tablet with 25 mg of zinc from an amino acid chelate. It adds magnesium, manganese, vitamin A (750 micrograms retinol equivalents) and vitamin B6 (41.1 mg).

It helps maintain skin health, skin integrity and structure, collagen formation and wound healing, and supports immune system health. Adults take 1 tablet once a day with food. The 168-tablet bottle works out at about 21 cents a day. It contains sulfites.

Count the 25 mg of zinc towards your 40 mg daily total [16]. The recommended daily amount of vitamin A from all sources is 700 micrograms retinol equivalents for women and 900 micrograms retinol equivalents for men. When taken in excess of 3,000 micrograms retinol equivalents, vitamin A can cause birth defects. If you're pregnant, or considering becoming pregnant, don't take vitamin A supplements without talking to your doctor or pharmacist. It contains vitamin B6, so stop taking it and see your healthcare practitioner if you feel tingling, burning or numbness.

Key details: 168 tablets | 1 tablet a day with food | Zinc 25 mg, vitamin A 750 micrograms RE, vitamin B6 41.1 mg | Contains sulfites | AUST L 91611

7. Henry Blooms Super Colloidal Silica

Mineral only
View Henry Blooms Super Colloidal Silica at Mr Vitamins

Silica is a source of silicon, a trace mineral. In 50 women with sun-damaged skin, a different form, orthosilicic acid, reduced skin roughness compared with placebo over 20 weeks [13]. Bio Minerals, the company that ingredient was developed for, funded the study.

Each vegan capsule gives you 300 mg of colloidal anhydrous silica, equal to 140 mg of silicon. It helps maintain skin elasticity, supports collagen formation, and helps maintain hair strength and nail health. Adults take 1 to 2 capsules a day with a meal. Children under 12 should only use it as professionally directed. The twin pack holds 120 capsules, about 30 to 59 cents a day.

Key details: 120 capsules (2 x 60) | 1 to 2 capsules a day with a meal | Silicon 140 mg per capsule | Vegan | AUST L 172525

8. Antipodes Glow Vitamin C Brightening Serum

Vitamin C serum
View Antipodes Glow Vitamin C Brightening Serum at Mr Vitamins

If you'd like to care for your skin from the outside too, a vitamin C serum is a lovely morning ritual. Antipodes Glow Vitamin C Brightening Serum gets its vitamin C from Kakadu plum extract, a native Australian fruit, with plant-derived hyaluronic acid to hydrate and plump the look of skin.

It also contains grape and kiwi extracts and bakuchiol, a plant ingredient that helps smooth the look of your complexion. Apply 3 to 4 drops to cleansed skin each morning, then follow with your day cream and sunscreen. A 30 mL bottle is $43.95. It's a cosmetic for external use only: avoid your eyes, patch test before first use, and stop if irritation occurs. It contains fragrance and alcohol.

Key details: 30 mL serum | 3 to 4 drops each morning | Kakadu plum extract and hyaluronic acid | Contains fragrance | Cosmetic

Best Vitamins for Skin in Australia (2026 Comparison)

Prices are Mr Vitamins prices on 9 November 2026 and may change. Cost per day is calculated at the label dose from the largest pack sold; it isn't shown where the product page gives no serve size, or for the serum. Ratings count only reviews of each product on mrvitamins.com.au on the same date.

Build A Daily Skin Support Routine

Be gentle with yourself and start small: one or two products that suit your skin, used at the same time each day. Give a supplement at least 12 weeks before you judge it, because skin changes slowly [9].

• Morning: cleanse, apply a vitamin C serum such as Antipodes Glow Vitamin C Brightening Serum, then moisturiser and SPF50 sunscreen.
• With breakfast: if you enjoy a collagen drink, stir Live More You Nutraceuticals Marine Collagen into your coffee or smoothie.
• With a meal: if your diet is light on fruit and vegetables, add Herbs Of Gold Vitamin C 1000 Plus, from about 21 cents a day.

Prefer to keep it to one product? Carusos Total Beauty Collagen Powder combines collagen peptides and vitamin C in one scoop for about $1.40 a day. Not sure which combination suits you? Book 10 minutes with a qualified naturopath online, free, for help choosing.

Vitamin C Serums: Which Form Suits Your Skin?

Vitamin C serums are among the most searched skincare products, and the choice can feel overwhelming. Here's how the main forms differ, so you can pick one that suits your skin.

• L-ascorbic acid: the pure form, best studied. It needs a low pH (below 3.5) to enter the skin, and most reputable serums contain 10 to 20% [17]. Concentrations above 20% add nothing and may irritate [17].
• Vitamin C derivatives: forms such as magnesium ascorbyl phosphate and ascorbyl glucoside are more stable, but they penetrate poorly or have an unknown conversion rate [1]. In absorption tests on pig skin, some derivatives didn't raise skin vitamin C at all [18].
• Plant sources: extracts such as Kakadu plum provide vitamin C within a wider plant mix, as in our Antipodes pick.

Keep your serum tightly closed and away from light and heat. If you're pregnant, ask your pharmacist before adding new skincare.

Skin Vitamins by Situation

Match the pairing to your personal circumstances, then explore our in-depth guides.

Best Vitamins for Glowing Skin

A healthy glow starts with sleep, sun protection and plenty of fruit and vegetables [4]. If your diet runs short, a vitamin C supplement such as Herbs Of Gold Vitamin C 1000 Plus supports skin health. A morning vitamin C serum adds radiance from the outside.

Best Vitamins for Dry, Ageing Skin

Collagen peptides improved hydration and elasticity across trials, but independent trials showed no clear benefit [2]. Carusos Total Beauty Collagen Powder helps enhance skin firmness and elasticity. Daily sunscreen slowed skin ageing in a 4.5-year trial [3], so pair it with a moisturiser that suits your skin type [4].

Best Vitamins for Acne-Prone Skin

Acne is common, and you're far from alone if it knocks your confidence. In a 2020 review of 25 studies, zinc reduced inflamed acne spots [10]. In a trial of 332 people, zinc worked in about one in three, compared with about two in three for the antibiotic minocycline [12]. Zinc did little for blackheads and whiteheads [11]. Please see your GP or a dermatologist for an acne treatment plan, and ask your pharmacist before adding zinc to any acne medicine.

Best Hair, Skin and Nail Vitamins for Women

Many women look for one product that covers hair, skin and nails. Carusos Total Beauty Collagen Powder and Henry Blooms Super Colloidal Silica both have permitted uses across skin and nails. If you're planning a pregnancy, check any product with vitamin A, such as Blackmores Bio Zinc, with your doctor or pharmacist first.

Best Skin Vitamins for Men

The same ingredients apply to men's skin. Men need more zinc than women, with a daily target of 14 mg compared with 8 mg [16]. If you take a men's multivitamin with zinc, add up your total before choosing a zinc product, and keep it under 40 mg a day [16].

Vitamin A for Skin

For skin, vitamin A works mostly from the outside. Retinoid creams such as tretinoin can reduce fine wrinkles and sun spots with long-term use, and retinol is a milder form found in cosmetics [19] [20]. They can cause dryness, peeling and sun sensitivity, so start slowly [19]. Some retinoids shouldn't be used in pregnancy [19]. Adults should keep preformed vitamin A from food and supplements under 3,000 micrograms a day [15].

Vitamin B3 (Nicotinamide) and Skin Cancer

Nicotinamide, a form of vitamin B3, has been studied in people at high risk of skin cancer. In an Australian trial of 386 people who'd had at least two non-melanoma skin cancers in five years, 1,000 mg a day lowered new skin cancers by 23% over 12 months [21]. The benefit didn't last after people stopped, and that dose is above the 900 mg daily upper limit for nicotinamide supplements [15]. Australia's National Health and Medical Research Council funded the trial. A later trial in organ-transplant recipients found no benefit [22]. Experts say this treatment is only for people with multiple skin cancers, not the general population [23]. If that's you, talk to your dermatologist or GP. Nicotinamide doesn't replace sunscreen or regular skin checks.

Vitamin B5 for Skin

One small 12-week trial found a supplement based on vitamin B5 (pantothenic acid) reduced facial acne spots compared with placebo [24]. It used 2.2 g a day, hundreds of times the usual daily need. Avilan Marketing, the company that markets the tested product, sponsored the study.

Rosacea-Prone Skin

Rosacea is managed with sun protection, gentle skincare and medical treatments from your doctor [25]. Common triggers include sun, heat, spicy food, alcohol and some cosmetic products [25]. Choose gentle, alcohol-free products and patch test anything new.

Collagen vs Vitamin C for Skin: What's the Difference?

Which Skin Supplement Should You Choose?

Choosing a Skin Supplement

The best vitamins for skin are vitamin C and zinc, with collagen peptides the most popular addition, all built on daily sun protection. Our top pick, Live More You Nutraceuticals Marine Collagen, suits adults who'd like an unflavoured collagen to stir into a daily drink. It's sold as a food, not a listed medicine.

For vitamin C, Herbs Of Gold Vitamin C 1000 Plus is our most reviewed choice, and Nutrivital Non-Acidic Vitamin C Complete is gentler on the stomach. Carusos Total Beauty Collagen Powder combines collagen peptides and vitamin C with listed skin uses. Whichever you choose, look after your skin day to day, wear sunscreen and give it at least 12 weeks.

How to Choose the Right Skin Supplement for You

• Start with the foundations
  • Wear SPF50 sunscreen when the UV index is 3 or above [6]
  • Don't smoke, sleep well and moisturise [4]
• Look at your diet
  • Vitamin C supplements help most if your blood levels are low [1]
• Add up zinc and vitamin A
  • Keep total zinc under 40 mg a day [16] and preformed vitamin A under 3,000 micrograms a day [15]
  • High zinc doses over time can lower copper levels [11]
• Check the label category
  • Look for the AUST L number on listed medicines and verify it on the TGA's ARTG register
• Be wary of big promises
  • Claims of results within days don't match how slowly skin renews

Why Buy Your Skin Supplements From Mr Vitamins

• Expert advice, free: qualified practitioners in every store, with no appointment needed, plus 10 minutes with a qualified naturopath online, free and with no obligation to buy
• Trusted since 1992: 8 stores across NSW and QLD
• Rated 4.7 stars: from more than 8,000 verified customer reviews
• Range: more than 840 trusted brands
• Fast and free options: free Click & Collect in 1 hour, and free standard shipping on orders over $120 in NSW and the ACT, or over $150 in QLD, VIC, SA, TAS and WA (see our Shipping policy)
• Quick dispatch: our team endeavours to dispatch in-stock orders the same day

Not Sure Where to Start?

Every skin is different, and it's completely normal to feel unsure where to begin. A practitioner can help you work out whether a supplement, a skincare change or a GP visit comes first. Find our practitioners in store, or book 10 minutes with a qualified naturopath from the Mr Vitamins online team, free. See your GP about any new or changing spot, ongoing acne or a rash that won't settle.

Skin Supplement FAQs

References

1. Pullar JM, Carr AC, Vissers MCM. The roles of vitamin C in skin health. Nutrients. 2017;9(8):866. doi:10.3390/nu9080866
2. 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. doi:10.1016/j.amjmed.2025.04.034
3. Hughes MCB, Williams GM, Baker P, Green AC. Sunscreen and prevention of skin aging: a randomized trial. Ann Intern Med. 2013;158(11):781-790. doi:10.7326/0003-4819-158-11-201306040-00002
4. The Royal Women's Hospital. Caring for your skin. thewomens.org.au/health-information/staying-well/tips-for-staying-well/caring-for-your-skin
5. Cosgrove MC, Franco OH, Granger SP, Murray PG, Mayes AE. Dietary nutrient intakes and skin-aging appearance among middle-aged American women. Am J Clin Nutr. 2007;86(4):1225-1231. doi:10.1093/ajcn/86.4.1225
6. Cancer Council Australia. 5 S's of Sun Safety: Slip, Slop, Slap, Seek and Slide. cancer.org.au/save-your-skin/five-sunsmart-steps
7. Proksch E, Segger D, Degwert J, Schunck M, Zague V, Oesser S. 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. doi:10.1159/000351376
8. Proksch E, Schunck M, Zague V, Segger D, Degwert J, Oesser S. Oral intake of specific bioactive collagen peptides reduces skin wrinkles and increases dermal matrix synthesis. Skin Pharmacol Physiol. 2014;27(3):113-119. doi:10.1159/000355523
9. Batool A, Abbas MS, Farooq R, Akbar MA, Ahmed A, Kanwal W, et al. Oral collagen peptides and skin rejuvenation: a systematic review and an updated meta-analysis of randomized controlled trials. J Cosmet Dermatol. 2026;25(7):e71041. doi:10.1111/jocd.71041
10. Yee BE, Richards P, Sui JY, Marsch AF. Serum zinc levels and efficacy of zinc treatment in acne vulgaris: a systematic review and meta-analysis. Dermatol Ther. 2020;33(6):e14252. doi:10.1111/dth.14252
11. Spiniello S, Termini D, Tavoletti G, Avallone G, Alberti-Violetti S, Marzano AV, et al. Oral zinc supplementation in acne vulgaris and hidradenitis suppurativa: an updated comprehensive review. Nutrients. 2026;18(17):2865. doi:10.3390/nu18172865
12. Dreno B, Moyse D, Alirezai M, Amblard P, Auffret N, Beylot C, et al. Multicenter randomized comparative double-blind controlled clinical trial of the safety and efficacy of zinc gluconate versus minocycline hydrochloride in the treatment of inflammatory acne vulgaris. Dermatology. 2001;203(2):135-140. doi:10.1159/000051728
13. Barel A, Calomme M, Timchenko A, De Paepe K, Demeester N, Rogiers V, et al. Effect of oral intake of choline-stabilized orthosilicic acid on skin, nails and hair in women with photodamaged skin. Arch Dermatol Res. 2005;297(4):147-153. doi:10.1007/s00403-005-0584-6
14. Jung JY, Kwon HH, Hong JS, Yoon JY, Park MS, Jang MY, et al. Effect of dietary supplementation with omega-3 fatty acid and gamma-linolenic acid on acne vulgaris: a randomised, double-blind, controlled trial. Acta Derm Venereol. 2014;94(5):521-525. doi:10.2340/00015555-1802
15. National Health and Medical Research Council. Nutrient Reference Values for Australia and New Zealand including Recommended Dietary Intakes. Canberra: NHMRC; 2006. nhmrc.gov.au/sites/default/files/images/nutrient-refererence-dietary-intakes.pdf
16. National Health and Medical Research Council. Nutrient Reference Values for Australia and New Zealand: Zinc. eatforhealth.gov.au/nutrient-reference-values/nutrients/zinc
17. Al-Niaimi F, Chiang NYZ. Topical vitamin C and the skin: mechanisms of action and clinical applications. J Clin Aesthet Dermatol. 2017;10(7):14-17. PMID: 29104718. pubmed.ncbi.nlm.nih.gov/29104718
18. Pinnell SR, Yang H, Omar M, Monteiro-Riviere N, DeBuys HV, Walker LC, et al. Topical L-ascorbic acid: percutaneous absorption studies. Dermatol Surg. 2001;27(2):137-142. doi:10.1046/j.1524-4725.2001.00264.x
19. Samaranayaka S, Jarrett P. Topical retinoids. DermNet. Updated July 2021. dermnetnz.org/topics/topical-retinoids
20. Mukherjee S, Date A, Patravale V, Korting HC, Roeder A, Weindl G. Retinoids in the treatment of skin aging: an overview of clinical efficacy and safety. Clin Interv Aging. 2006;1(4):327-348. doi:10.2147/ciia.2006.1.4.327
21. Chen AC, Martin AJ, Choy B, Fernández-Peñas P, Dalziell RA, McKenzie CA, et al. A phase 3 randomized trial of nicotinamide for skin-cancer chemoprevention. N Engl J Med. 2015;373(17):1618-1626. doi:10.1056/NEJMoa1506197
22. Allen NC, Martin AJ, Snaidr VA, Eggins R, Chong AH, Fernández-Peñas P, et al. Nicotinamide for skin-cancer chemoprevention in transplant recipients. N Engl J Med. 2023;388(9):804-812. doi:10.1056/NEJMoa2203086
23. Cancer Council NSW. News item on the ONTRAC nicotinamide trial. cancercouncil.com.au/?p=6979
24. Yang M, Moclair B, Hatcher V, Kaminetsky J, Mekas M, Chapas A, et al. A randomized, double-blind, placebo-controlled study of a novel pantothenic acid-based dietary supplement in subjects with mild to moderate facial acne. Dermatol Ther (Heidelb). 2014;4(1):93-101. doi:10.1007/s13555-014-0052-3
25. Kuo O. Rosacea. DermNet. March 2022; minor update September 2024. dermnetnz.org/topics/rosacea
26. Biełach-Bazyluk A, Jurga M, Flisiak I, Zbroch E. Dietary collagen supplementation as a strategy for skin health: a narrative review of clinical effects on skin, hair, nails, and wound healing. Nutrients. 2026;18(13):2141. doi:10.3390/nu18132141
27. Keen MA, Hassan I. Vitamin E in dermatology. Indian Dermatol Online J. 2016;7(4):311-315. doi:10.4103/2229-5178.185494
28. Baumann LS, Spencer J. The effects of topical vitamin E on the cosmetic appearance of scars. Dermatol Surg. 1999;25(4):311-315. doi:10.1046/j.1524-4725.1999.08223.x
29. National Institutes of Health Office of Dietary Supplements. Biotin: fact sheet for health professionals. Updated 10 January 2022. ods.od.nih.gov/factsheets/biotin-HealthProfessional