PlainVitamins

Essential Amino Acids 500 mg

by Dr. Clark Research Association Dr. Clark Zentrum · capsule · 100 capsules

  • On the market (NIH)
  • UPC 7 640116 922921
  • DSLD label 223131
  • Serving 6 capsules
  • 17 servings

Essential Amino Acids 500 mg by Dr. Clark Research Association Dr. Clark Zentrum lists 9 ingredients, 9 with an amount per serving of 6 capsules, such as 672 mg of L-leucine, 516 mg of L-lysine, 450 mg of L-valine and 432 mg of L-phenylalanine, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on June 24, 2020.

What is in Essential Amino Acids 500 mg?

Each row as the label prints it, per serving of 6 capsules. 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).

Essential Amino Acids 500 mg: Supplement Facts rows against the market (DSLD label 223131, January 2026 release)
IngredientAmount% DVAmong products listing it
EnergyEnergy Note: (51kJ) (12 kcal)no amount given1%
Protein3,000 mg6%Protein in Essential Amino Acids 500 mg against 8,985 products3 g per serving; the middle half of products list 2 g to 24 g, the median 16 g.3 g

67% of 8,985 products listing protein give more (median 16 g).

L-Leucine672 mgLeucine in Essential Amino Acids 500 mg against 2,056 products0.672 g per serving; the middle half of products list 1 g to 3.5 g, the median 2.5 g.0.672 g

79% of 2,056 products listing leucine give more (median 2.5 g).

L-Lysine516 mgLysine in Essential Amino Acids 500 mg against 1,250 products516 mg per serving; the middle half of products list 148.25 mg to 996.25 mg, the median 500 mg.516 mg

Higher than 61% of 1,250 products listing lysine (median 500 mg).

L-Valine450 mgValine in Essential Amino Acids 500 mg against 1,632 products0.45 g per serving; the middle half of products list 0.5 g to 1.5 g, the median 1.25 g.0.45 g

78% of 1,632 products listing valine give more (median 1.25 g).

L-Phenylalanine432 mgPhenylalanine in Essential Amino Acids 500 mg against 611 products432 mg per serving; the middle half of products list 100 mg to 597.5 mg, the median 250 mg.432 mg

Higher than 62% of 611 products listing phenylalanine (median 250 mg).

L-Isoleucine348 mgIsoleucine in Essential Amino Acids 500 mg against 1,614 products0.348 g per serving; the middle half of products list 0.5 g to 1.5 g, the median 1.23 g.0.348 g

81% of 1,614 products listing isoleucine give more (median 1.23 g).

L-Threonine258 mgTHREONINE in Essential Amino Acids 500 mg against 590 products258 mg per serving; the middle half of products list 140 mg to 886.25 mg, the median 500 mg.258 mg

65% of 590 products listing THREONINE give more (median 500 mg).

L-Methionine180 mgMETHIONINE in Essential Amino Acids 500 mg against 981 products180 mg per serving; the middle half of products list 25 mg to 250 mg, the median 100 mg.180 mg

Higher than 67% of 981 products listing METHIONINE (median 100 mg).

L-Tryptophan72 mgTryptophan in Essential Amino Acids 500 mg against 605 products72 mg per serving; the middle half of products list 55 mg to 471 mg, the median 123 mg.72 mg

69% of 605 products listing tryptophan give more (median 123 mg).

L-Cysteine72 mgCysteine in Essential Amino Acids 500 mg against 516 products72 mg per serving; the middle half of products list 30 mg to 200 mg, the median 85 mg.72 mg

53% of 516 products listing cysteine give more (median 85 mg).

Source: NIH ODS Dietary Supplement Label Database, label 223131 (entered June 24, 2020), 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?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

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 Essential Amino Acids 500 mg'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
Adults and children 12 or more years of age: 6 capsules daily or as directed. 6 capsules cover 25% of the recommended daily amount of each essential amino acid recommended by the WHO for a 155 lbs (70 kg) adult.
Warnings
Store out of reach of young children.
Dietary supplements/food supplements should not be used as a substitute for a varied diet. Do not exceed the stated recommended daily dose.
Storage
Store in a dry, cool place.

Source: label statements in DSLD label 223131.

What else is on the label?

Other ingredients: L-Leucine, L-Lysine, L-Valine, L-Phenylalanine, L-Isoleucine, L-Threonine, L-Methionine, Gelatin, L-Tryptophan, L-Cysteine.

How many labels does Essential Amino Acids 500 mg have?

One label is on file, entered on June 24, 2020.

  1. Label 223131 (current) Entered June 24, 2020 · on the market · 100 capsules · UPC 7 640116 922921

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

Who makes it?

The label names Dr. Clark Zentrum Limited (distributor), San Gwann, Malta. All Dr. Clark Research Association Dr. Clark Zentrum products.

Where next?