Extra Strength Hair Skin & Nails®

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Serving Size: 3 Tablet(s) · 1 per day

Not Present

• 

  21st Century Hair, Skin & Nails Extra Strength Tablets

  21st-century-vitamins4.6(8100)

  $9.99
• 

  21st Century Advanced Formula Hair, Skin & Nails 50 Tablets

  Walmart - OTCRx4U4.6(4800)

  $9.01
• 

  21st Century Healthy Renewal Formula Hair Skin & Nails Extra Strength - 90 Tablets Pack of 2

  GoSupps.com4.6(4800)

  $59.99
• 

  Pack of 12-Hair Skin & Nails X/Str Tab 90 By 21st Century USA

  AmericanPharmaWholesale.com

  $82.47
• 

  Nature's Bounty Extra Strength Hair, Skin & Nails Softgels

  Target4.5(8800)

  $23.99
• 

  21st Century Biotin mcg

  Walmart4.7(6800)

  $12.60
• 

  21st Century Biotin

  21st-century-vitamins4.7(1100)

  $9.99
• 

  Case of 12-21st Century Healthy Renewal Formula Hair, Skin & Nails Tablets 50 EA

  AmericanPharmaWholesale.com

  $65.88

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• Beauté Concept

  4.4 (45)

  Beauty supply store

  95 Rue de Rome, 13006 Marseille

  Directions09 82 50 41 34

• PEGGY SAGE Marseille

  4.0 (120)

  Beauty supply store

  50 Rue Saint-Ferréol, 13001 Marseille

  Directions04 84 45 39 00

• Cosmetic hair Shop 2

  4.9 (89)

  Barber supply store

  15 Rue d'Aix, 13001 Marseille

  Directions06 17 76 76 75

• Cosmetic Hair Shop

  4.6 (619)

  Cosmetics store

  63 Av. Claude Monet, 13014 Marseille

  Directions06 17 76 76 75

• Espace Beaute

  4.4 (46)

  Beauty supply store

  6 Bd de Paris, 13003 Marseille

  Directions09 52 46 47 44

• Printemps Les Terrasses du Port

  4.6 (4652)

  Department store

  Les Terrasses Du Port, 9 Quai du Lazaret, 13002 Marseille

  Directions01 71 25 26 01

• Antioxidants to defend healthy and youthful skin—current trends and future directions in cosmetology

  A Budzianowska, K Banaś, J Budzianowski… - Applied Sciences, 2025 - mdpi.com

  … body, including the skin, hair, and nails. This involves the use of … began in the late 19th century, notably with the observation of … Key compounds such as phenolics, vitamins C and E, and …

  2025105 citations

• Clinical evaluation of a plant-based supplement on hair, skin, nail health, and psychological well-being: A 90-day observational study

  SJ Pandya, CH Savaliya, VB Shiravale… - Cosmoderma, 2025 - cosmoderma.org

  … role in maintaining healthy hair, skin, and nails. While severe deficiency is rare, mild or subclinical deficiency is common and can lead to hair thinning, brittle nails, and dry, irritated skin. […

  20251 citations

• Benefits and risks of hair, skin, and nail supplements in older adults

  V Shing, AA Sierra, AA Shah - International Journal of Women's …, 2025 - journals.lww.com

  … The cosmetic dietary supplement industry has a large and rapidly growing market, and a … to “promote healthy hair, skin, and nails.” However, the purported claims of dietary supplements …

  2025

• Nutrition for Healthy Hair

  RM Trüeb - 2020 - Springer

  … This chapter aims at reviewing some key historical moments in the development of our understanding of diet and health. Although food and nutrition have been studied for centuries, …

  202016 citations

• Consumer perception of biotin supplementation

  JJ John, SR Lipner - Journal of cutaneous medicine and …, 2019 - journals.sagepub.com

  … of reviewers claiming whether biotin helped with skin, hair, or nails were recorded. … of patients relying on internet resources for health care decisions. Moreover, dermatologists and other …

  201917 citations

• Risks of skin, hair, and nail supplements

  EK Burns, A Perez-Sanchez… - Dermatology Practical & …, 2020 - pmc.ncbi.nlm.nih.gov

  … nails may inquire about the use of nail supplements. … (vitamin E) supplementation in healthy men increased the risk of prostate cancer by 17% [62]. Folic acid supplementation in healthy …

  202025 citations

• Riboflavin (Vitamin B2) on the Label

  What riboflavin is, how much a typical product provides, and why it can change the color of urine.

  VitaSuppTrack Editorial· Jun 24, 2026
• Magnesium Forms Explained: Oxide, Citrate, and Glycinate

  The magnesium form on a label affects how much elemental magnesium you get. Here is how the common forms compare.

  VitaSuppTrack Editorial· Jun 24, 2026

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2021-12-18. DSLD Label ID: 258442. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.