PlainVitamins

Hair and Nails Formula

by Klaire Labs · capsule · 60 vegetarian capsules

  • Off the market since February 2025 (NIH)
  • UPC 8 17234 01169 2
  • DSLD label 322284
  • Serving 1 capsule
  • 60 servings

Hair and Nails Formula by Klaire Labs lists 4 ingredients, 4 with an amount per serving of 1 capsule, such as 10,000 mcg of D-biotin, 250 mg of N-acetyl-L-cysteine, 150 mg of inositol and 75 mg of para-aminobenzoic acid. Its current label entered the NIH Dietary Supplement Label Database on December 21, 2024.

What is in Hair and Nails Formula?

Each row as the label prints it, per serving of 1 capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Hair and Nails Formula: Supplement Facts rows against the market (DSLD label 322284, January 2026 release)
IngredientAmount% DVAmong products listing it
D-Biotinas D-Biotin10,000 mcg33,333%Biotin in Hair and Nails Formula against 9,447 products10,000 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg10,000 mcg

Higher than 97% of 9,447 products listing biotin (median 200 mcg). Per day at the most servings: 20,000 mcg.

N-Acetyl-L-Cysteine250 mgN-Acetyl Cysteine in Hair and Nails Formula against 1,259 products250 mg per serving; the middle half of products list 55 mg to 500 mg, the median 150 mg.250 mg

Higher than 60% of 1,259 products listing N-acetyl cysteine (median 150 mg). Per day at the most servings: 500 mg.

Inositol150 mgInositol in Hair and Nails Formula against 4,042 products150 mg per serving; the middle half of products list 10 mg to 80 mg, the median 30 mg.150 mg

Higher than 87% of 4,042 products listing inositol (median 30 mg). Per day at the most servings: 300 mg.

Para-Aminobenzoic Acid75 mgPABA in Hair and Nails Formula against 1,610 products75 mg per serving; the middle half of products list 10 mg to 50 mg, the median 25 mg.75 mg

Higher than 83% of 1,610 products listing PABA (median 25 mg). Per day at the most servings: 150 mg.

Source: NIH ODS Dietary Supplement Label Database, label 322284 (entered December 21, 2024), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • Its 10,000 mcg of D-biotin (filed by NIH under biotin) is higher than 97% of the 9,447 biotin products that print an amount; 62 list more.

The NIH database records 2 servings a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

The products whose ingredient lists overlap most with Hair and Nails Formula's, rare ingredients counting for more.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Suggested use: 1 capsule, 2 times daily with food or as directed by a healthcare professional.
Warnings
Do not use if shrinkwrap is broken or missing.
Caution: If you are pregnant, nursing, have a medical condition, or taking prescription drugs, consult your physician before using this product.
Keep out of reach of children.
Allergens and what it does not contain
Free of the following common allergens: milk/casein, eggs, fish, shellfish, tree nuts, peanuts, soybeans, corn, and yeast. Contains no artificial colors, flavors, or preservatives.
Storage
Store in a cool, dry place (59 degrees F-85 degrees F) away from direct light.

Source: label statements in DSLD label 322284.

What else is on the label?

Other ingredients: Hydroxypropyl Methylcellulose, Water, Silica.

How many labels does Hair and Nails Formula have?

One label is on file, entered on December 21, 2024.

  1. Label 322284 (current) Entered December 21, 2024 · off the market February 18, 2025 · 60 vegetarian capsules · UPC 8 17234 01169 2

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names SFI USA (manufacturer), Reno, NV. All Klaire Labs products.

Where next?