Your skin is often where a B vitamin shortfall shows up first: cracked lip corners, rashes, sensitivity. That's real. What's less clear is whether extra B vitamins improve skin that's already healthy. Here's what the evidence says.
Written by Vita Globe Editorial Team | Reviewed against NIH Office of Dietary Supplements guidance and peer-reviewed research
Is vitamin B complex good for your skin?
Several B vitamins, including riboflavin, niacin, B6 and biotin, are needed for healthy skin, and deficiencies can cause rashes, cracked lips and dermatitis[1][2][3][4]. If you're low, correcting that can help. For people with adequate levels, there's little evidence that a standard B complex visibly improves skin.
Caveat: The most impressive skin research on a B vitamin used high-dose oral nicotinamide in a specific high-risk group, not a typical B complex[5].
Sources: NIH ODS Niacin · NIH ODS Riboflavin · Chen et al. NEJM 2015 · Verified 2026-09-27
In this article
Why does your skin need B vitamins?
Skin cells turn over constantly, which makes skin a heavy user of the nutrients involved in energy production and cell growth. Several B vitamins are part of that machinery. When one runs short, the skin, lips and mouth are often among the first places it shows:
| Vitamin | Skin-related signs of deficiency |
|---|---|
| Riboflavin (B2) | Skin disorders, cracks at the corners of the mouth (angular stomatitis), cracked lips[1] |
| Niacin (B3) | Pellagra: a pigmented, rough rash on sun-exposed skin[2] |
| Vitamin B6 | Dermatitis with cracked lips (cheilosis) and a sore tongue[3] |
| Biotin (B7) | A scaly, red rash around the eyes, nose and mouth[4] |
These deficiencies are uncommon in people eating a varied diet, but they're a good reminder that B vitamins genuinely matter for skin. For a broader list of signs, see signs you're low on B vitamins.
What about niacinamide, the skincare ingredient?
Niacinamide (also called nicotinamide) is a form of vitamin B3 and one of the most popular ingredients in skincare serums. Unlike the nicotinic acid form of niacin, it doesn't cause flushing[2].
The strongest oral research comes from a 2015 trial published in the New England Journal of Medicine. In 386 people who had already had at least two non-melanoma skin cancers, taking 500 mg of nicotinamide twice daily for a year led to about 23% fewer new non-melanoma skin cancers than placebo[5]. The benefit didn't last after people stopped.
That's an important finding, but it's specific: a high dose, a high-risk group and a medical outcome, under a dermatologist's care. It doesn't mean a daily B complex will change how your skin looks, and it's not a reason to self-treat. If you have a history of skin cancer, talk to your dermatologist.
Does biotin improve skin?
Biotin is heavily marketed for skin, hair and nails. According to NIH, the evidence in healthy people is very limited: studies are small, often lack a placebo group and rarely check biotin status first[4]. The rash of biotin deficiency is real, but deficiency is rare.
High-dose biotin can also interfere with some lab tests, so tell your healthcare provider if you take it[4]. We cover biotin and hair in more depth in vitamin B complex for hair growth.
Can B vitamins cause breakouts?
Some people notice acne after starting high-dose B12. There's a possible explanation: a 2015 study found that B12 changed the gene activity of Cutibacterium acnes (formerly Propionibacterium acnes), the skin bacterium linked to acne, in a way that may promote inflammation[6]. This research is early and doesn't show that typical supplement doses cause acne in most people.
If you notice new breakouts after starting a supplement, it's reasonable to pause it and see whether things settle, and to talk to a dermatologist if they don't.
What's a realistic approach to B vitamins and skin?
- Cover the basics through food. Eggs, dairy, fish, poultry, legumes, whole grains and leafy greens supply most B vitamins.
- Consider a B complex if your diet has gaps, especially if you're plant-based or eat a limited range of foods.
- Don't expect a supplement to replace skincare. Sunscreen, a gentle routine and a dermatologist for persistent problems will do more.
- Watch for signs of deficiency, such as cracked lip corners or unusual rashes, and get them checked[1][3].
For a wider look at nutrients and skin, read the best vitamins for glowing skin and strong nails and hair, skin and nails vitamins: what the evidence supports.
The honest summary
- B vitamins are essential for skin, and deficiencies often show up on the skin and lips first[1][2][3][4].
- If you're not deficient, there's little evidence a B complex visibly improves skin.
- High-dose oral nicotinamide has strong evidence in a specific high-risk group, under medical care[5].
- High-dose B12 may be linked to breakouts in some people[6].
Our option
Vita Globe Vitamin B Complex Gummies
If you're looking to fill everyday B vitamin gaps, one gummy a day provides six B vitamins, including niacin, B6, folate and B12, plus vitamin C and inositol. It's vegan and gluten-free, made without artificial colors or flavors, and tested by an independent third-party lab. It isn't a skin treatment.
Frequently asked questions
Which B vitamin is best for skin?
There isn't one "best." Riboflavin, niacin, B6 and biotin all play roles, and deficiency of each can affect the skin[1][2][3][4]. Niacinamide (B3) has the most research as a skincare ingredient.
Can vitamin B complex help with acne?
There's no good evidence that a standard B complex treats acne. Some people actually notice breakouts with high-dose B12. See a dermatologist for persistent acne.
Is niacinamide the same as niacin?
Both are forms of vitamin B3. Nicotinic acid can cause flushing at higher doses; nicotinamide (niacinamide) doesn't[2].
Can B vitamins make your skin glow?
If a deficiency was affecting your skin, correcting it can help. If your levels are already fine, there's no strong evidence that extra B vitamins create a visible glow.
Does B12 cause acne?
It may in some people. Research suggests B12 can change how acne-associated skin bacteria behave[6], but most people taking B12 don't break out.
Sources
- National Institutes of Health, Office of Dietary Supplements. Riboflavin: Fact Sheet for Health Professionals. Updated May 11, 2022. ods.od.nih.gov
- National Institutes of Health, Office of Dietary Supplements. Niacin: Fact Sheet for Health Professionals. Updated November 18, 2022. ods.od.nih.gov
- National Institutes of Health, Office of Dietary Supplements. Vitamin B6: Fact Sheet for Health Professionals. Updated June 16, 2023. ods.od.nih.gov
- National Institutes of Health, Office of Dietary Supplements. Biotin: Fact Sheet for Health Professionals. Updated January 10, 2022. ods.od.nih.gov
- 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. New England Journal of Medicine. 2015;373(17):1618-1626. doi:10.1056/NEJMoa1506197
- Kang D, Shi B, Erfe MC, Craft N, Li H. Vitamin B12 modulates the transcriptome of the skin microbiota in acne pathogenesis. Science Translational Medicine. 2015;7(293):293ra103. doi:10.1126/scitranslmed.aab2009
About the Vita Globe Editorial Team
The Vita Globe Editorial Team researches and writes our wellness content, working from peer-reviewed research, systematic reviews and guidance from bodies such as the NIH and the FDA. We cite our sources inline and update articles when the evidence changes.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for medical advice. Talk to your healthcare provider before starting any new supplement, particularly if you are pregnant, nursing, taking medication, or caring for a child.
