PlainVitamins

Longer, Stronger Hair and Nails

by Irwin Naturals · softgel capsule · 120 liquid softgels

  • On the market (NIH)
  • UPC 7 10363 58134 3
  • DSLD label 292075
  • Serving 2 liquid softgels
  • 60 servings

Longer, Stronger Hair and Nails by Irwin Naturals lists 17 ingredients, 15 with an amount per serving of 2 liquid softgels, such as 200 mg of vitamin C, 2,600 mcg of biotin, 30 mg of calcium and 10 mg of zinc; 2 sit inside a blend without their own amounts, beside 2 Nutrition Facts rows (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on July 18, 2023.

What is in Longer, Stronger Hair and Nails?

Each row as the label prints it, per serving of 2 liquid softgels. 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).

Longer, Stronger Hair and Nails: Supplement Facts rows against the market (DSLD label 292075, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories20 Calories
Total Fat1 g1%Fat (unspecified) in Longer, Stronger Hair and Nails against 11,965 products1 g per serving; the middle half of products list 1 g to 2.5 g, the median 1.5 g.1 g

56% of 11,965 products listing fat (unspecified) give more (median 1.5 g).

Protein1 gProtein in Longer, Stronger Hair and Nails against 8,985 products1 g per serving; the middle half of products list 2 g to 24 g, the median 16 g.1 g

77% of 8,985 products listing protein give more (median 16 g).

Vitamin Cas Calcium Ascorbate200 mg222%Vitamin C in Longer, Stronger Hair and Nails against 18,583 products200 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg200 mg

Higher than 63% of 18,583 products listing vitamin C (median 100 mg).

Biotin2,600 mcg8,667%Biotin in Longer, Stronger Hair and Nails against 9,447 products2,600 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg2,600 mcg

Higher than 91% of 9,447 products listing biotin (median 200 mcg).

Calcium30 mg2%Calcium in Longer, Stronger Hair and Nails against 17,831 products30 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg30 mg

84% of 17,831 products listing calcium give more (median 115 mg).

Zincas Zinc Picolinate10 mg91%Zinc in Longer, Stronger Hair and Nails against 13,186 products10 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg10 mg

51% of 13,186 products listing zinc give more (median 11 mg).

Copperas Copper Amino Acid Chelate1 mg111%Copper in Longer, Stronger Hair and Nails against 6,468 products1 mg per serving; the middle half of products list 0.5 mg to 2 mg, the median 1 mg.DV 0.9 mgUL 10 mg1 mg

40% of 6,468 products listing copper give more (median 1 mg).

Manganeseas Manganese Citrate5 mg217%Manganese in Longer, Stronger Hair and Nails against 7,016 products5 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg5 mg

Higher than 80% of 7,016 products listing manganese (median 2 mg).

Flaxseed Oil1,058 mgFlaxseed Oil in Longer, Stronger Hair and Nails against 512 products1.06 g per serving; the middle half of products list 0.4 g to 1.15 g, the median 1 g.1.06 g

Higher than 74% of 512 products listing flaxseed oil (median 1 g).

Gotu Kola herb extract180 mgGotu Kola in Longer, Stronger Hair and Nails against 393 products180 mg per serving; the middle half of products list 50 mg to 225 mg, the median 100 mg.180 mg

Higher than 67% of 393 products listing gotu kola (median 100 mg).

Triterpenes10%18 mgTriterpene (unspecified) in Longer, Stronger Hair and Nails against 68 products18 mg per serving; the middle half of products list 1 mg to 5 mg, the median 2 mg.18 mg

Higher than 88% of 68 products listing triterpene (unspecified) (median 2 mg).

Horsetail Herb Extract160 mgHorsetail in Longer, Stronger Hair and Nails against 519 products160 mg per serving; the middle half of products list 20 mg to 200 mg, the median 67 mg.160 mg

Higher than 73% of 519 products listing horsetail (median 67 mg).

Silica7%11.2 mgSilicon in Longer, Stronger Hair and Nails against 1,220 products11.2 mg per serving; the middle half of products list 2 mg to 10.5 mg, the median 4 mg.11.2 mg

Higher than 76% of 1,220 products listing silicon (median 4 mg).

Citrus Fruit Extract100 mgCitrus in Longer, Stronger Hair and Nails against 69 products100 mg per serving; the middle half of products list 28 mg to 200 mg, the median 85 mg.100 mg

Higher than 52% of 69 products listing citrus (median 85 mg).

Bioflavonoids50%50 mgFlavonoid in Longer, Stronger Hair and Nails against 2,343 products50 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.50 mg

46% of 2,343 products listing flavonoid give more (median 50 mg).

Lysineas Lysine Hydrochloride80 mgLysine in Longer, Stronger Hair and Nails against 1,250 products80 mg per serving; the middle half of products list 148.25 mg to 996.25 mg, the median 500 mg.80 mg

84% of 1,250 products listing lysine give more (median 500 mg).

Proline80 mgProline in Longer, Stronger Hair and Nails against 387 products80 mg per serving; the middle half of products list 100 mg to 1,289 mg, the median 487.5 mg.80 mg

80% of 387 products listing proline give more (median 487.5 mg).

BioPerine Complex12 mg
BioPerineas Black Pepper Fruit Extract95% Piperinein the blend, no amount given
Ginger extractas Gingerolsin the blend, no amount given

Source: NIH ODS Dietary Supplement Label Database, label 292075 (entered July 18, 2023), 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 2,600 mcg of biotin is higher than 91% of the 9,447 biotin products that print an amount; 831 list more.

The NIH database records one serving 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 Longer, Stronger Hair and Nails'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
Directions: (Adult) Take two (2) Liquid Soft-Gels daily with meals and a full glass (8oz) of water.
Warnings
Usage Warnings: Do not use if safety seal is broken.
Check with your doctor before using this product if you are using medication or have any medical conditions. Do not use if you may become pregnant, are pregnant or nursing.
Do not exceed recommended daily intake.
Not intended for use by persons under 18. Keep out of reach of children.
Contains: Soy
Allergens and what it does not contain
No preservatives added.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 292075.

What else is on the label?

Other ingredients: Gelatin, Water, Purified, Glycerin, Beeswax, Soy Lecithin, Titanium Dioxide, Dextrin, Caramel, Red Cabbage extract, Maltodextrin.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Pass Quality Tested Guaranteed.

How many labels does Longer, Stronger Hair and Nails have?

2 labels are on file under this name since October 22, 2021: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 292075 (current) Entered July 18, 2023 · on the market · 120 liquid softgels · UPC 7 10363 58134 3
  2. Label 256342 Entered October 22, 2021 · on the market · 60 liquid softgels · UPC 7 10363 56939 6

DSLD also links this label to: Healthy Skin & Hair Plus Nails (package size difference, same product), Healthy Skin & Hair Plus Nails (package size difference, same product), Healthy Skin & Hair Plus Nails (package size difference, same product), Healthy Skin & Hair Plus Nails (package size difference, same product), Healthy Skin & Hair Plus Nails (package size difference, same product), Healthy Skin & Hair Plus Nails (package size difference, same product), Healthy Skin & Hair Plus Nails (package size difference, same product), Healthy Skin & Hair Plus Nails (package size difference, same product).

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

Who makes it?

The label names Irwin Naturals (manufacturer, distributor), Los Angeles, CA. All Irwin Naturals products.

Where next?