Hair, Skin & Nails
by 21st Century · tablet or pill · 50 tablets
- On the market (NIH)
- UPC 7 40985 21434 3
- DSLD label 205740
- Serving 1 tablet
Hair, Skin & Nails by 21st Century lists 53 ingredients, 30 with an amount per serving of 1 tablet, such as 750 mcg RAE of vitamin A, 50 mg of vitamin C, 1.2 mcg (48 IU) of vitamin D3 and 25 mg of vitamin E; 23 sit inside a blend without their own amounts. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2019.
What is in Hair, Skin & Nails?
Each row as the label prints it, per serving of 1 tablet. 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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin Aas Vitamin A PalmitateVitamin A (Form: as Vitamin A Palmitate) | 750 mcg RAE | 80% | |
| Vitamin Cas Ascorbic Acid | 50 mg | 60% | 77% of 18,583 products listing vitamin C give more (median 100 mg). Per day at the most servings: 100 mg. |
| Vitamin D3as Cholecalciferol | 1.2 mcg (48 IU) | 6% | 98% of 14,175 products listing vitamin D give more (median 15 mcg). Per day at the most servings: 2.4 mcg. |
| Vitamin Eas DL-Alpha-Tocopheryl AcetateVitamin E (Form: as DL-Alpha Tocopheryl Acetate) | 25 mg | 170% | |
| Thiamineas Thiamine Mononitrate, Vitamin B1Thiamin (Form: as Thiamin Mononitrate) (Alt. Name: B-1) | 5 mg | 420% | 46% of 9,830 products listing thiamin give more (median 5 mg). Per day at the most servings: 10 mg. |
| Riboflavinas Vitamin B2 | 5 mg | 380% | Higher than 51% of 9,824 products listing riboflavin (median 4 mg). Per day at the most servings: 10 mg. |
| Niacin | 7.5 mg | 45% | 86% of 12,413 products listing niacin give more (median 20 mg). Per day at the most servings: 15 mg. |
| Vitamin B6as Pyridoxine HydrochlorideVitamin B-6 (Form: as Pyridoxine HCl) | 6.5 mg | 380% | Higher than 51% of 15,277 products listing vitamin B6 (median 6 mg). Per day at the most servings: 13 mg. |
| Folate | 42 mcg DFE | 10% | |
| Folic Acid | 25 mcg | ||
| Vitamin B12as CyanocobalaminVitamin B-12 (Form: as Cyanocobalamin) | 25 mcg | 1,040% | 54% of 14,425 products listing vitamin B12 give more (median 36 mcg). Per day at the most servings: 50 mcg. |
| Biotin | 25 mcg | 80% | 92% of 9,447 products listing biotin give more (median 200 mcg). Per day at the most servings: 50 mcg. |
| Pantothenic Acidas D-Calcium PantothenatePantothenic Acid (Form: as D-Calcium Pantothenate) | 15 mg | 300% | Higher than 51% of 10,060 products listing pantothenic acid (vitamin B5) (median 12 mg). Per day at the most servings: 30 mg. |
| Cholineas Choline Bitartrate | 25 mg | 4% | 59% of 4,738 products listing choline give more (median 40 mg). Per day at the most servings: 50 mg. |
| Calciumas Calcium Carbonate, Dicalcium PhosphateCalcium (Form: as Dicalcium Phosphate, & Calcium Carbonate) | 125 mg | 10% | Higher than 53% of 17,831 products listing calcium (median 115 mg). Per day at the most servings: 250 mg. |
| Ironas Ferrous FumarateIron (Form: as Ferrous Fumarate) | 3.3 mg | 20% | 60% of 6,910 products listing iron give more (median 5 mg). Per day at the most servings: 6.6 mg. |
| Phosphorusas Dicalcium PhosphatePhosphorus (Form: as Dicalcium Phosphate) | 58 mg | 4% | 66% of 3,786 products listing phosphorus give more (median 90 mg). Per day at the most servings: 116 mg. |
| Iodineas Potassium IodideIodine (Form: as Potassium Iodide) | 150 mcg | 100% | 15% of 6,382 products listing iodine give more (median 150 mcg). Per day at the most servings: 300 mcg. |
| Magnesiumas Magnesium OxideMagnesium (Form: as Magnesium Oxide) | 20 mg | 20% | 83% of 14,003 products listing magnesium give more (median 86 mg). Per day at the most servings: 40 mg. |
| Zincas Zinc GluconateZinc (Form: as Zinc Gluconate) | 0.6 mg | 4% | 98% of 13,186 products listing zinc give more (median 11 mg). Per day at the most servings: 1.2 mg. |
| Manganeseas Manganese SulfateManganese (Form: as Manganese Sulfate) | 0.6 mg | 25% | 85% of 7,016 products listing manganese give more (median 2 mg). Per day at the most servings: 1.2 mg. |
| Potassiumas Potassium Iodide, Potassium SulfatePotassium (Form: as Potassium Iodide, & Potassium Sulfate) | 5 mg | 1% | This amount is far outside what other labels list for potassium, or disagrees with the label's own %DV: possibly a unit or transcription slip in the database. Check the label image on DSLD. |
| Betaine HCl | 10 mg | 88% of 914 products listing betaine hydrochloride give more (median 50 mg). Per day at the most servings: 20 mg. | |
| Inositol | 10 mg | 72% of 4,042 products listing inositol give more (median 30 mg). Per day at the most servings: 20 mg. | |
| Paba | 10 mg | 72% of 1,610 products listing PABA give more (median 25 mg). Per day at the most servings: 20 mg. | |
| Dna | 10 mg | Higher than 77% of 78 products listing DNA (median 2.3 mg). Per day at the most servings: 20 mg. | |
| Rna | 10 mg | 55% of 159 products listing RNA give more (median 20 mg). Per day at the most servings: 20 mg. | |
| Tyrosine | 7.2 mg | 99% of 1,680 products listing tyrosine give more (median 500 mg). Per day at the most servings: 14.4 mg. | |
| Cysteine Hydrochloride | 3.5 mg | 94% of 516 products listing cysteine give more (median 85 mg). Per day at the most servings: 7 mg. | |
| Soy ProteinSoy Protein Note: Amino Acid Blend | 50 mg | 74% of 46 products listing soy protein give more (median 142.5 mg). Per day at the most servings: 100 mg. | |
| Glutamic Acid | no amount given | ||
| Lysine | no amount given | ||
| Leucine | no amount given | ||
| Aspartic Acid | no amount given | ||
| Isoleucine | no amount given | ||
| Valine | no amount given | ||
| Alanine | no amount given | ||
| Arginine | no amount given | ||
| Histidine | no amount given | ||
| Serine | no amount given |
Show the other 14 rows of the label
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Threonine | no amount given | ||
| Glycine | no amount given | ||
| Ornithine Hydrochloride | no amount given | ||
| Proprietary Herbal Support Blend | 310 mg | ||
| Brewers Yeast | in the blend, no amount given | ||
| Soy Protein | in the blend, no amount given | ||
| Horsetail | in the blend, no amount given | ||
| Parsley | in the blend, no amount given | ||
| Rose Hips | in the blend, no amount given | ||
| Watercress | in the blend, no amount given | ||
| Kelp | in the blend, no amount given | ||
| Citrus Bioflavonoids | in the blend, no amount given | ||
| Lecithin | in the blend, no amount given | ||
| Rutin | in the blend, no amount given |
Source: NIH ODS Dietary Supplement Label Database, label 205740 (entered August 23, 2019), version 9.4.0. See the label on DSLD. 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:
- 98% of the 14,175 products that print an amount of vitamin D list more than its 1.2 mcg (48 IU) of vitamin D (median 15 mcg (600 IU)).
- 92% of the 9,447 products that print an amount of biotin list more than its 25 mcg of biotin (median 200 mcg).
- 98% of the 13,186 products that print an amount of zinc list more than its 0.6 mg of zinc (median 11 mg).
- 88% of the 914 products that print an amount of betaine hydrochloride list more than its 10 mg of betaine HCl (filed by NIH under betaine hydrochloride) (median 50 mg).
- 99% of the 1,680 products that print an amount of tyrosine list more than its 7.2 mg of tyrosine (median 500 mg).
- 94% of the 516 products that print an amount of cysteine list more than its 3.5 mg of cysteine (median 85 mg).
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, Skin & Nails's, rare ingredients counting for more.
- Advanced Formula Hair, Skin & Nails21st Century · off the market 50 shared, 95% alike
- Formula VM-2000Solgar 43 shared, 56% alike
- Prenatal NutrientsSolgar 36 shared, 53% alike
- Premium Soy Protein Isolate Powder VanillaVitamin World 34 shared, 49% alike
- Premium Soy Protein Isolate Powder ChocolateVitamin World 34 shared, 47% alike
- Multi-ComplexNutri-West 28 shared, 40% alike
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: As a dietary supplement, adults take one (1) tablet with any meal, twice daily or as directed by a healthcare provider. Do not exceed recommended dosage.
- Warnings
- Do not exceed recommended dosage.
- Warning: Consult a healthcare provider prior to use if pregnant, nursing, on medications, have a medical condition or are planning a medical procedure.
- Stop use and contact a physician if adverse reactions occur.
- Not intended for use by persons under the age of 18. Keep out of reach of children.
- Do not use if product appears to be tampered with or seal is broken.
- Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. In case of accidental overdose, call a doctor or poison control center immediately.
- Contains soy and fish (DNA).
- Allergens and what it does not contain
- No added Artificial Flavors.
- Gluten free
- Storage
- Store at room temperature.
Source: label statements in DSLD label 205740.
What else is on the label?
Other ingredients: Cellulose, Stearic Acid, Silicon Dioxide, Maltodextrin, Croscarmellose Sodium, Contains Less Than 2% of.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Guaranteed quality Laboratory tested.
How many labels does Hair, Skin & Nails have?
3 labels are on file under this name since July 25, 2012: other sizes, label designs and reformulations. The current one leads this page.
- Label 205740 (current) Entered August 23, 2019 · on the market · 50 tablets · UPC 7 40985 21434 3
- Label 43782 Entered March 25, 2015 · off the market March 14, 2019 · 50 tablets · UPC 7 40985 21434 3
- Label 11381 Entered July 25, 2012 · off the market March 12, 2015 · 50 caplets · UPC 7 40985 21434 3
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names 21st Century HealthCare, Inc. (manufacturer), Tempe, AZ. All 21st Century products.