Dietary Supplements Causing Hair Loss & Acne? A Dermatologist Explains

Can dietary supplements cause hair loss, acne, rashes, nail changes, or other skin problems? Dermatologist Dr. Dray explores the growing connection between social media health trends, fad diets, dietary supplement overuse, and dermatologic disease

In this video, Dr. Dray discusses several important examples, including selenium toxicity (selenosis), niacin toxicity and flushing, zinc-induced copper deficiency, whey protein and acne, and potentially adulterated bodybuilding and performance supplements.

She also explains why dermatologists should ask about dietary supplements when evaluating unexplained hair loss, nail dystrophy, rashes, pigmentary changes, acne, and other unusual skin findings.

One particularly important example is selenium toxicity. Excessive selenium can cause rapid, sometimes dramatic hair loss, nail abnormalities, gastrointestinal symptoms, fatigue, garlic-smelling breath, and other systemic effects. Selenium exposure can come from supplements as well as foods such as Brazil nuts, making total intake important to consider.

Dr. Dray also discusses niacin, which can cause the characteristic "niacin flush," and excessive zinc intake, which can interfere with copper absorption and potentially contribute to pigmentary changes, hair abnormalities, poor wound healing, and systemic complications.

The video takes a more nuanced look at whey protein and acne as well. Although whey protein has been associated with acne in case reports and observational research, a 2024 randomized controlled trial did not find that whey protein significantly worsened acne severity. This provides an important reminder that a plausible mechanism or anecdotal experience is not the same thing as definitive evidence.

The discussion then expands beyond individual supplements to the larger problem of health misinformation on social media. Online nutrition and supplement content can be highly persuasive, particularly when it combines dramatic before-and-after results, confident claims, influencer marketing, and easy access to products.

The skin, hair, and nails can sometimes provide important clues to nutritional deficiencies, supplement toxicity, or other systemic problems. In the era of social media-driven health trends, taking a careful dietary and supplement history can be an important part of dermatologic evaluation.

Primary Paper
Parga AD, Coven H. "When Diet Trends Go Viral: Cutaneous Manifestations of Social Media-Driven Fad Diets and Supplements." Cureus. 2025;17(6):e86334. doi:10.7759/cureus.86334.

Disclaimer: This video is for educational purposes and does not constitute individualized medical advice. Anyone experiencing unexplained hair loss, rashes, nail changes, acne, or other concerning symptoms should consult an appropriate healthcare professional.

#Dermatology #Supplements #SkinHealth #HairLoss #Selenium #Acne #DietarySupplements #HealthMisinformation #Skincare #DrDray

FTC: This video is not sponsored. Links are commissionable, meaning I may earn commission from purchases made through links.

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Disclaimer: This video is not intended to provide diagnosis, treatment or medical advice. Content provided on this Youtube channel is for informational purposes only. Please consult with a physician or other healthcare professional regarding any medical or health related diagnosis or treatment options. Information on this Youtube channel should not be considered as a substitute for advice from a healthcare professional. The statements made about specific products throughout this video are not to diagnose, treat, cure or prevent disease.