Hair Growth Supplements: Evidence-Based Ingredients and Patient Counseling
Clinical Summary
Hair Growth Supplements: Evidence-Based Selection and Patient Counseling
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Hair growth supplements: Prioritize products supported by clinical research, large sample sizes, and demonstrated clinical efficacy. According to the transcript, “there's no substitute for clinical efficacy” when evaluating supplements for hair growth.
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Biotin, vitamin D, zinc, saw palmetto, stinging nettle: Biotin is included because genetic biotin deficiency can cause hair loss; vitamin D supports hair follicles through vitamin D receptors; zinc provides anti-inflammatory and antimicrobial effects and supports hair growth. Saw palmetto and stinging nettle act as botanical “5-alpha reductase inhibitors.”
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Clinical counseling: Review all patient supplements to identify “stacking” and potential vitamin overdosing. Obtain a complete nutritional profile, assess total supplement exposure, and avoid combinations that may result in excessive vitamin intake or adverse health effects.
Reviewed by Jessica Garlewicz, Managing Digital Editor of Immunology Group
Dr Zoe Diana Draelos discusses how dermatologists can evaluate hair growth supplements based on clinical evidence rather than marketing claims. Learn the role of ingredients like biotin, vitamin D, zinc, and saw palmetto in hair health, and how to safely integrate supplements into evidence-based hair loss treatment plans.
Transcript
Hello, my name is Zoe Diana Draelos, and I'm a board-certified clinical and research dermatologist.
With so many oral hair supplements on the market, how can clinicians distinguish between ingredients with true biologic relevance and those included primarily for marketing appeal?
Dr Draelos: Well, there are a lot of hair supplements that are available for a dermatologist to recommend. I think the thing that differentiates hair supplements from one another is the amount of clinical research and data that's behind the product. There are many different vitamins that can be included and many different botanicals that can be included as well. So zeroing in on those product lines that have good clinical evidence with large sample sizes to assess the value of the hair supplement are the ones that you want to pick. There's no substitute for clinical efficacy in figuring out which vitamin supplement for hair growth might be most advantageous for your patient.
What role do common components—such as biotin, vitamin D, zinc, and botanical agents like saw palmetto—play in hair growth, and in which patients are they most clinically meaningful?
Dr Draelos: There are many different ingredients that you could incorporate into a hair growth supplement. There is a genetic deficiency of biotin that can cause hair loss and from that biotin has been extrapolated to put into hair growth supplements. Other ingredients that are put into hair growth supplements include vitamin D. Because many postmenopausal and mature men have vitamin D deficiency, which decreases hair growth because there are vitamin D receptors within the hair follicle. Zinc is also included. It's a mineral. Zinc also can help. It's an anti-inflammatory. It has some antimicrobial effects. But zinc also has an important role to play in hair growth and is therefore included in many hair growth supplements.
On the botanical side, the additives that are incorporated are usually 5-alpha reductase inhibitors. In other words, these are plant mimics of finasteride. So those are things like stinging nettle. and salt palmetto. Those two ingredients are sometimes used together because they're both 5-alpha reductase inhibitors. So combining vitamins for good nutritional health, with ingredients that play an active role in the hair follicle, with 5-alpha reductase inhibitors, allows you to create a category that we know as hair growth supplements.
How should dermatologists counsel patients on the limitations of supplements and integrate them into an evidence-based treatment plan for hair loss?
Dr Draelos: When you're a dermatologist thinking about hair growth supplements, you have to be careful that patients are not stacking. I'm going to have to start over with that. I have a frog in my throat. I appreciate that. Thank you. I'll start over. I got it. I'll start over with that. There are several important considerations that the dermatologist must think about when prescribing hair growth supplements. Many individuals are called stacking their vitamins. That means they're taking one for this, one for that, one for this, one for that, and at the end of the day, they're getting too much vitamin A, too much vitamin C, too much vitamin E. And we know that overdosing vitamin E can indeed increase the incidence of heart disease.
So what the dermatologist needs to do is to take a complete nutritional profile of their patients and understand every supplement they're taking. Be sure that they're not two that are not copesthetic with one another, to be sure there are two that are causing an overdose. And in doing so, the dermatologist, one, can get optimal results, and two, can better understand which hair growth supplement might be good for a given patient.
