PlainVitamins

Amino 21

by DaVinci Laboratories · capsule · 90 capsules

  • On the market (NIH)
  • UPC 0 26664 23029 4
  • DSLD label 322151
  • Serving 1 capsule
  • 90 servings

Amino 21 by DaVinci Laboratories lists 21 ingredients, 21 with an amount per serving of 1 capsule, such as 225 mg of glutamic acid, 75 mg of L-glutamine, 75 mg of L-taurine and 45 mg of L-aspartic acid. Its current label entered the NIH Dietary Supplement Label Database on December 21, 2024.

What is in Amino 21?

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).

Amino 21: Supplement Facts rows against the market (DSLD label 322151, January 2026 release)
IngredientAmount% DVAmong products listing it
Glutamic Acid225 mgGlutamic Acid in Amino 21 against 697 products225 mg per serving; the middle half of products list 25 mg to 364 mg, the median 80 mg.225 mg

Higher than 70% of 697 products listing glutamic acid (median 80 mg). Per day at the most servings: 675 mg.

L-Glutamine75 mgGlutamine in Amino 21 against 1,850 products0.075 g per serving; the middle half of products list 0.356 g to 3 g, the median 1 g.0.075 g

91% of 1,850 products listing glutamine give more (median 1 g). Per day at the most servings: 0.225 g.

L-Taurine75 mgTaurine in Amino 21 against 2,337 products75 mg per serving; the middle half of products list 110 mg to 1,000 mg, the median 500 mg.75 mg

86% of 2,337 products listing taurine give more (median 500 mg). Per day at the most servings: 225 mg.

L-Aspartic Acid45 mgAspartic Acid in Amino 21 against 377 products45 mg per serving; the middle half of products list 106 mg to 1,846 mg, the median 337 mg.45 mg

90% of 377 products listing aspartic acid give more (median 337 mg). Per day at the most servings: 135 mg.

L-Glycine45 mgGlycine in Amino 21 against 1,078 products45 mg per serving; the middle half of products list 100 mg to 846 mg, the median 300 mg.45 mg

87% of 1,078 products listing glycine give more (median 300 mg). Per day at the most servings: 135 mg.

L-Lysine Hydrochloride30 mgLysine in Amino 21 against 1,250 products30 mg per serving; the middle half of products list 148.25 mg to 996.25 mg, the median 500 mg.30 mg

92% of 1,250 products listing lysine give more (median 500 mg). Per day at the most servings: 90 mg.

L-Phenylalanine30 mgPhenylalanine in Amino 21 against 611 products30 mg per serving; the middle half of products list 100 mg to 597.5 mg, the median 250 mg.30 mg

90% of 611 products listing phenylalanine give more (median 250 mg). Per day at the most servings: 90 mg.

Tyrosine30 mgTyrosine in Amino 21 against 1,680 products30 mg per serving; the middle half of products list 150 mg to 989 mg, the median 500 mg.30 mg

93% of 1,680 products listing tyrosine give more (median 500 mg). Per day at the most servings: 90 mg.

L-Arginine22.5 mgArginine in Amino 21 against 1,455 products22.5 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.22.5 mg

92% of 1,455 products listing arginine give more (median 500 mg). Per day at the most servings: 67.5 mg.

L-Cysteine22.5 mgCysteine in Amino 21 against 516 products22.5 mg per serving; the middle half of products list 30 mg to 200 mg, the median 85 mg.22.5 mg

80% of 516 products listing cysteine give more (median 85 mg). Per day at the most servings: 67.5 mg.

L-Leucine22.5 mgLeucine in Amino 21 against 2,056 products0.0225 g per serving; the middle half of products list 1 g to 3.5 g, the median 2.5 g.0.0225 g

98% of 2,056 products listing leucine give more (median 2.5 g). Per day at the most servings: 0.0675 g.

L-Methionine22.5 mgMETHIONINE in Amino 21 against 981 products22.5 mg per serving; the middle half of products list 25 mg to 250 mg, the median 100 mg.22.5 mg

80% of 981 products listing METHIONINE give more (median 100 mg). Per day at the most servings: 67.5 mg.

L-Alanine15 mgAlanine in Amino 21 against 475 products15 mg per serving; the middle half of products list 100 mg to 972 mg, the median 483 mg.15 mg

95% of 475 products listing alanine give more (median 483 mg). Per day at the most servings: 45 mg.

L-Serine15 mgSerine in Amino 21 against 314 products15 mg per serving; the middle half of products list 100 mg to 1,056 mg, the median 408 mg.15 mg

96% of 314 products listing serine give more (median 408 mg). Per day at the most servings: 45 mg.

L-Threonine15 mgTHREONINE in Amino 21 against 590 products15 mg per serving; the middle half of products list 140 mg to 886.25 mg, the median 500 mg.15 mg

96% of 590 products listing THREONINE give more (median 500 mg). Per day at the most servings: 45 mg.

L-Citrulline15 mgCitrulline in Amino 21 against 1,209 products0.015 g per serving; the middle half of products list 1 g to 5 g, the median 3 g.0.015 g

over 99% of 1,209 products listing citrulline give more (median 3 g). Per day at the most servings: 0.045 g.

L-Valine15 mgValine in Amino 21 against 1,632 products0.015 g per serving; the middle half of products list 0.5 g to 1.5 g, the median 1.25 g.0.015 g

98% of 1,632 products listing valine give more (median 1.25 g). Per day at the most servings: 0.045 g.

L-Histidine Hydrochloride7.5 mgHistidine in Amino 21 against 591 products7.5 mg per serving; the middle half of products list 50 mg to 402.8 mg, the median 125 mg.7.5 mg

97% of 591 products listing histidine give more (median 125 mg). Per day at the most servings: 22.5 mg.

L-Isoleucine7.5 mgIsoleucine in Amino 21 against 1,614 products0.0075 g per serving; the middle half of products list 0.5 g to 1.5 g, the median 1.23 g.0.0075 g

over 99% of 1,614 products listing isoleucine give more (median 1.23 g). Per day at the most servings: 0.0225 g.

L-Ornithine Hydrochloride7.5 mgOrnithine in Amino 21 against 258 products7.5 mg per serving; the middle half of products list 100 mg to 900 mg, the median 400 mg.7.5 mg

97% of 258 products listing ornithine give more (median 400 mg). Per day at the most servings: 22.5 mg.

L-Proline7.5 mgProline in Amino 21 against 387 products7.5 mg per serving; the middle half of products list 100 mg to 1,289 mg, the median 487.5 mg.7.5 mg

97% of 387 products listing proline give more (median 487.5 mg). Per day at the most servings: 22.5 mg.

Source: NIH ODS Dietary Supplement Label Database, label 322151 (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:

  • 91% of the 1,850 products that print an amount of glutamine list more than its 0.075 g of L-glutamine (filed by NIH under glutamine) (median 1 g).
  • 90% of the 377 products that print an amount of aspartic acid list more than its 45 mg of L-aspartic acid (filed by NIH under aspartic acid) (median 337 mg).
  • 92% of the 1,250 products that print an amount of lysine list more than its 30 mg of L-lysine hydrochloride (filed by NIH under lysine) (median 500 mg).
  • 90% of the 611 products that print an amount of phenylalanine list more than its 30 mg of L-phenylalanine (filed by NIH under phenylalanine) (median 250 mg).
  • 93% of the 1,680 products that print an amount of tyrosine list more than its 30 mg of tyrosine (median 500 mg).
  • 92% of the 1,455 products that print an amount of arginine list more than its 22.5 mg of L-arginine (filed by NIH under arginine) (median 500 mg).

The NIH database records 3 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 Amino 21's, rare ingredients counting for more.

  • Amino DaySource Naturals 20 shared, 92% alike
  • Amino 21DaVinci Laboratories Of Vermont · off the market 20 shared, 89% alike
  • Amino BlendPL Progressive Laboratories · off the market 20 shared, 89% alike
  • Amino Max 21FoodScience of Vermont 20 shared, 88% alike
  • Amino Pro 750 mgBodSmith · off the market 20 shared, 88% alike
  • AminocapsIntensive Nutrition · off the market 20 shared, 87% 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
Suggested Use: As a dietary supplement, take 1 capsule between meals, 3 times daily, or as directed by your healthcare practitioner.
Warnings
Warning: Individuals with PKU (phenylketonuria) or who are pregnant or nursing should not use this product.
Keep out of reach of children.
To obtain product information or report a serious adverse event, call 1-800-325-1776.
Allergens and what it does not contain
Gluten free
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 322151.

What else is on the label?

Other ingredients: Cellulose.

How many labels does Amino 21 have?

3 labels are on file under this name since June 22, 2023: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 322151 (current) Entered December 21, 2024 · on the market · 90 capsules · UPC 0 26664 23029 4
  2. Label 303717 Entered October 24, 2023 · off the market September 27, 2024 · 90 capsules · UPC 0 26664 23029 4
  3. Label 288171 Entered June 22, 2023 · off the market October 1, 2022 · 90 capsules · UPC 0 26664 23029 4

DSLD also links this label to: Amino 21 (image 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 DaVinci Laboratories a division of FoodScience LLC (distributor), Williston, VT. All DaVinci Laboratories products.

Where next?