PlainVitamins

Essential Amino Protein

by ProCaps Laboratories · capsule · 360 easy-to-swallow capsules

  • Off the market since February 2025 (NIH)
  • UPC 140266
  • DSLD label 320104
  • Serving 4 capsules
  • 90 servings

Essential Amino Protein by ProCaps Laboratories lists 18 ingredients, 18 with an amount per serving of 4 capsules, such as 400 mg of L-lysine, 300 mg of L-glutamic acid, 150 mg of L-arginine and 150 mg of L-leucine, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on October 24, 2024.

What is in Essential Amino Protein?

Each row as the label prints it, per serving of 4 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 Protein: Supplement Facts rows against the market (DSLD label 320104, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories10 Calories
Protein2 g4%Protein in Essential Amino Protein against 8,985 products2 g per serving; the middle half of products list 2 g to 24 g, the median 16 g.2 g

70% of 8,985 products listing protein give more (median 16 g).

L-Lysineessential amino acids are marked with an e and branched chain amino acids are marked with a b.400 mgLysine in Essential Amino Protein against 1,250 products400 mg per serving; the middle half of products list 148.25 mg to 996.25 mg, the median 500 mg.400 mg

56% of 1,250 products listing lysine give more (median 500 mg).

L-Glutamic Acid300 mgGlutamic Acid in Essential Amino Protein against 697 products300 mg per serving; the middle half of products list 25 mg to 364 mg, the median 80 mg.300 mg

Higher than 72% of 697 products listing glutamic acid (median 80 mg).

L-Arginine150 mgArginine in Essential Amino Protein against 1,455 products150 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.150 mg

75% of 1,455 products listing arginine give more (median 500 mg).

L-Leucineessential amino acids are marked with an e and branched chain amino acids are marked with a b.150 mgLeucine in Essential Amino Protein against 2,056 products0.15 g per serving; the middle half of products list 1 g to 3.5 g, the median 2.5 g.0.15 g

91% of 2,056 products listing leucine give more (median 2.5 g).

L-Isoleucineessential amino acids are marked with an e and branched chain amino acids are marked with a b.150 mgIsoleucine in Essential Amino Protein against 1,614 products0.15 g per serving; the middle half of products list 0.5 g to 1.5 g, the median 1.23 g.0.15 g

90% of 1,614 products listing isoleucine give more (median 1.23 g).

L-Valineessential amino acids are marked with an e and branched chain amino acids are marked with a b.150 mgValine in Essential Amino Protein against 1,632 products0.15 g per serving; the middle half of products list 0.5 g to 1.5 g, the median 1.25 g.0.15 g

90% of 1,632 products listing valine give more (median 1.25 g).

L-Aspartic Acid100 mgAspartic Acid in Essential Amino Protein against 377 products100 mg per serving; the middle half of products list 106 mg to 1,846 mg, the median 337 mg.100 mg

76% of 377 products listing aspartic acid give more (median 337 mg).

L-Proline90 mgProline in Essential Amino Protein against 387 products90 mg per serving; the middle half of products list 100 mg to 1,289 mg, the median 487.5 mg.90 mg

78% of 387 products listing proline give more (median 487.5 mg).

L-Serine50 mgSerine in Essential Amino Protein against 314 products50 mg per serving; the middle half of products list 100 mg to 1,056 mg, the median 408 mg.50 mg

85% of 314 products listing serine give more (median 408 mg).

L-Tyrosine50 mgTyrosine in Essential Amino Protein against 1,680 products50 mg per serving; the middle half of products list 150 mg to 989 mg, the median 500 mg.50 mg

89% of 1,680 products listing tyrosine give more (median 500 mg).

L-Phenylalanineessential amino acids are marked with an e and branched chain amino acids are marked with a b.40 mgPhenylalanine in Essential Amino Protein against 611 products40 mg per serving; the middle half of products list 100 mg to 597.5 mg, the median 250 mg.40 mg

89% of 611 products listing phenylalanine give more (median 250 mg).

L-Cysteine25 mgCysteine in Essential Amino Protein against 516 products25 mg per serving; the middle half of products list 30 mg to 200 mg, the median 85 mg.25 mg

76% of 516 products listing cysteine give more (median 85 mg).

L-Glycine25 mgGlycine in Essential Amino Protein against 1,078 products25 mg per serving; the middle half of products list 100 mg to 846 mg, the median 300 mg.25 mg

91% of 1,078 products listing glycine give more (median 300 mg).

L-Alanine24 mgAlanine in Essential Amino Protein against 475 products24 mg per serving; the middle half of products list 100 mg to 972 mg, the median 483 mg.24 mg

94% of 475 products listing alanine give more (median 483 mg).

L-Histidineessential amino acids are marked with an e and branched chain amino acids are marked with a b.24 mgHistidine in Essential Amino Protein against 591 products24 mg per serving; the middle half of products list 50 mg to 402.8 mg, the median 125 mg.24 mg

86% of 591 products listing histidine give more (median 125 mg).

L-Threonineessential amino acids are marked with an e and branched chain amino acids are marked with a b.22 mgTHREONINE in Essential Amino Protein against 590 products22 mg per serving; the middle half of products list 140 mg to 886.25 mg, the median 500 mg.22 mg

94% of 590 products listing THREONINE give more (median 500 mg).

L-Methionineessential amino acids are marked with an e and branched chain amino acids are marked with a b.22 mgMETHIONINE in Essential Amino Protein against 981 products22 mg per serving; the middle half of products list 25 mg to 250 mg, the median 100 mg.22 mg

81% of 981 products listing METHIONINE give more (median 100 mg).

L-Tryptophanessential amino acids are marked with an e and branched chain amino acids are marked with a b.13 mgTryptophan in Essential Amino Protein against 605 products13 mg per serving; the middle half of products list 55 mg to 471 mg, the median 123 mg.13 mg

95% of 605 products listing tryptophan give more (median 123 mg).

Source: NIH ODS Dietary Supplement Label Database, label 320104 (entered October 24, 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 2,056 products that print an amount of leucine list more than its 0.15 g of L-leucine (filed by NIH under leucine) (median 2.5 g).
  • 90% of the 1,614 products that print an amount of isoleucine list more than its 0.15 g of L-isoleucine (filed by NIH under isoleucine) (median 1.23 g).
  • 90% of the 1,632 products that print an amount of valine list more than its 0.15 g of L-valine (filed by NIH under valine) (median 1.25 g).
  • 89% of the 1,680 products that print an amount of tyrosine list more than its 50 mg of L-tyrosine (filed by NIH under tyrosine) (median 500 mg).
  • 91% of the 1,078 products that print an amount of glycine list more than its 25 mg of L-glycine (filed by NIH under glycine) (median 300 mg).
  • 94% of the 475 products that print an amount of alanine list more than its 24 mg of L-alanine (filed by NIH under alanine) (median 483 mg).

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?

1 product lists the very same ingredients; the nearest amounts come first.

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 Consume four capsules daily. You can increase or decrease your intake based upon your needs and as guided by your health care provider. For questions about the use of this product call 800.800.1200.
Warnings
Notice: Use this product as a food supplement only. Do not use for weight reduction.
Allergens and what it does not contain
Essential Amino Protein comes in small easy-to-swallow capsules that contain our highly bioavailable protein/amino acid source, which is also hormone-free, lactose-free and sodium-free.
Contains no additives of any kind

Source: label statements in DSLD label 320104.

What else is on the label?

Other ingredients: Calcium Caseinate, L-Lysine Hydrochloride, L-Glutamic Acid, L-Arginine, L-Isoleucine, L-Valine, L-Leucine, L-Aspartic Acid, L-Cysteine Hydrochloride, L-Glycine, Gelatin.

How many labels does Essential Amino Protein have?

6 labels are on file under this name since January 25, 2012: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 320104 (current) Entered October 24, 2024 · off the market February 14, 2025 · 360 easy-to-swallow capsules · UPC 140266
  2. Label 248443 Entered May 22, 2021 · off the market December 13, 2023 · 360 easy-to-swallow capsules · UPC 140266
  3. Label 220079 Entered May 22, 2020 · off the market March 19, 2021 · 360 easy-to-swallow capsules · UPC 140266
  4. Label 57486 Entered March 24, 2016 · off the market April 2, 2020 · 360 easy-to-swallow capsules
  5. Label 30056 Entered February 26, 2014 · off the market January 26, 2016 · 360 easy to swallow capsules
  6. Label 4697 Entered January 25, 2012 · off the market January 1, 2013 · 360 easy to swallow capsules

DSLD also links this label to: Essential Amino Protein (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 ProCaps Labs (manufacturer), Henderson, NV. All ProCaps Laboratories products.

Where next?