Supplements That Can Cause Acne (and What to Do Instead)

Quick take: Not all supplements are skin-friendly. Some can worsen acne or trigger new breakouts.  Especially if the supplementst affect hormones, oil production, or the balance of bacteria on your skin. If your acne started after beginning a new supplement, it may be worth a closer look.

1) Vitamin B12 (and High-Dose B6)

Research shows that high doses of vitamin B12 can trigger acne-like breakouts in some people. B12 may alter how Cutibacterium acnes (formerly P. acnes) bacteria behave on the skin, increasing inflammation. Similar effects have been reported with excessive vitamin B6.

What to do: Stick to the recommended daily allowance (around 2.4 mcg for adults) unless your doctor prescribes more. Avoid “mega-B” complexes unless needed.

2) Iodine (Kelp, Seaweed, or High-Iodine Multivitamins)

Too much iodine can sometimes lead to acneiform eruptions which are tiny red bumps that resemble acne. People who take iodine-rich supplements like kelp tablets or multiple iodine-fortified foods are at higher risk.

What to do: Check labels for “kelp,” “iodine,” or “seaweed extract.” Most adults only need about 150 mcg of iodine per day from food sources like dairy or seafood. Salt may be enriched with iodine too which would be stated on the packaging. 

3) Whey Protein

Several studies suggest whey protein supplements are linked to acne, especially on the chest and back. Whey increases insulin-like growth factor 1 (IGF-1), which stimulates oil glands and speeds up skin cell turnover which are two key acne triggers.

What to do: Try pausing whey protein for 4–8 weeks and see if your skin improves. Plant-based protein powders (pea, soy, or rice) are good alternatives.

4) Muscle-Building Stacks and BCAA Supplements

High doses of branched-chain amino acids (BCAAs) or “muscle stacks” can activate the mTORC1 pathway, which promotes oil production and inflammation. Some bodybuilding supplements have also been found contaminated with anabolic steroids which are major acne triggers.

What to do: Choose third-party tested protein or amino acid products. If acne worsens, scale back or switch brands.

5) Anabolic Steroids and Testosterone Boosters

Steroid or testosterone-boosting supplements dramatically raise androgen levels, stimulating oil glands and causing deep, cystic acne on the face, chest, and back. This is known as “steroid acne.”

What to do: Avoid non-prescribed hormones. If you’re on a prescribed testosterone regimen, discuss acne management with your doctor or dermatologist.

6) DHEA

DHEA (dehydroepiandrosterone) is a hormone precursor that can convert into testosterone and other androgens in the body. Even low doses can cause oily skin and hormonal breakouts.

What to do: Only use DHEA under medical supervision. If breakouts start after taking it, ask your provider about dosage or alternatives.

7) Biotin (Vitamin B7)

Biotin is popular for hair and nail growth, but very high doses may worsen acne in some people by competing with vitamin B5 (pantothenic acid), which helps regulate skin oil. Evidence is mixed, but sensitive individuals might notice new pimples after starting biotin supplements.

What to do: Try lowering or pausing biotin for 4-6 weeks if your acne worsens. Always tell your doctor you take biotin. Biotin can interfere with certain lab tests.

Supplements That May Help Instead

• Omega-3 Fatty Acids (Fish Oil): Anti-inflammatory properties may help improve acne severity.
• Zinc: Plays a role in healing and regulating oil production.
• Vitamin A: Supports normal skin turnover (but avoid megadoses).
• Selenium: May work synergistically with zinc and vitamin E to reduce oxidative stress.

Tips for Acne-Safe Supplement Use

1. Introduce one new supplement at a time and track skin changes for 4–8 weeks.
2. Check labels for iodine, biotin, B12, or DHEA content.
3. Use third-party tested products (NSF, USP, or Informed Choice).
4. Discuss your full supplement list with your dermatologist or healthcare provider.

Key Takeaway

While vitamins and supplements can support your health, some may unexpectedly trigger acne. Keeping doses moderate, tracking your skin, and working with your healthcare provider can help you find the right balance for clear, healthy skin.

 

References 

• Kang D, Shi B, Erfe MC, Craft N, Li H. Vitamin B12 modulates the transcriptome of skin bacteria in acne pathogenesis. Sci Transl Med. 2015;7(293):293ra103.
• Stulberg DL, et al. Iodine-induced acneiform eruptions: review and case series. J Am Board Fam Pract. 2005;18(5):422–426.
• Silverberg NB. Whey protein precipitating acne in teens: case report and review. Pediatr Dermatol. 2014;31(3):e38–e39.
• Melnik BC, et al. Acne: mTORC1 hyperactivation by dietary and hormonal factors. Exp Dermatol. 2012;21(5):376–382.
• Kanayama G, et al. Anabolic–androgenic steroid use and body image in men: a review. Curr Opin Endocrinol Diabetes Obes. 2015;22(6):444–451.
• Morales AJ, et al. Effects of DHEA on endocrine-metabolic parameters and quality of life. J Clin Endocrinol Metab. 1995;80(10):3159–3168.
• Jung JY, et al. Effect of omega-3 fatty acid supplementation on acne vulgaris: a randomized trial. Acta Derm Venereol. 2014;94(5):521–525.