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MyRealHair

7 Reasons Hair Pills Won't Fix Thin Hair by Friday

Biotin. Gummies. Saw palmetto. Months of waiting for a maybe.

MyRealHair Editorial. Updated November 2026.
TLDR: The evidence for hair pills is thin, and even the best results take months. If you want thicker-looking hair this week, put it on. Don't swallow it.
1

The most famous hair vitamin has almost zero proof.

One review went looking for biotin success stories. It found 18 cases. All 18 had an underlying problem. Zero controlled trials in healthy people.1

18cases found. All 18 had an underlying cause.1
2

It can mess with your blood work.

The FDA warns biotin can throw off lab tests, including falsely low troponin, the marker doctors use to spot a heart attack.2

3

Saw palmetto lost to the prescription.

Two years. 100 men. Finasteride nearly doubled it.3

38% vs 68%of men improved: saw palmetto vs finasteride.3
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4

Nobody checked that bottle before you bought it.

"FDA does not have the authority to approve dietary supplements before they are marketed."4 "Supports healthy hair" never needed its sign-off.

5

Check who paid for the study.

The pumpkin seed oil trial everyone quotes was funded by the capsule maker.5 In a 2026 review, most trials were industry-backed, and total hair count didn't beat placebo.6

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6

Even when it works, it takes months.

The saw palmetto trial ran for two years.3 Hair grows slowly, so any pill is a long bet.

7

Thicker-looking by tomorrow morning.

Fibers don't regrow anything. They make the hair you have look thicker in 30 seconds, starting tomorrow.

References and study notes

Some trials report modest gains in men who are still thinning. Finasteride is a prescription drug, is not a supplement, and works for many men. Talk to a doctor before changing any medication, and tell your doctor if you take biotin before blood work. MyRealHair Fibers are a cosmetic and do not regrow hair.

  1. Patel DP, Swink SM, Castelo-Soccio L. A Review of the Use of Biotin for Hair Loss. Skin Appendage Disorders. 2017;3(3):166-169. PubMed | Full text
  2. US Food and Drug Administration. Biotin Interference with Troponin Lab Tests: Assays Subject to Biotin Interference. FDA
  3. Rossi A, Mari E, Scarno M, et al. Comparitive effectiveness of finasteride vs Serenoa repens in male androgenetic alopecia: a two-year study. Int J Immunopathol Pharmacol. 2012;25(4):1167-1173. PubMed
  4. US Food and Drug Administration. Questions and Answers on Dietary Supplements. FDA
  5. Cho YH, Lee SY, Jeong DW, et al. Effect of Pumpkin Seed Oil on Hair Growth in Men with Androgenetic Alopecia: A Randomized, Double-Blind, Placebo-Controlled Trial. Evid Based Complement Alternat Med. 2014;2014:549721. Full text
  6. Alanazi R, Alshammari S, Aldossari K, et al. Evaluating the Effectiveness of Commercial Oral Supplements for Hair Growth: A Systematic Review and Meta-Analysis. J Cosmet Dermatol. 2026;25(4):e70817. Full text
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