PlainVitamins

Amino Acid Synergy

by Designs for Health · capsule · 120 vegetarian capsules

  • On the market (NIH)
  • UPC 8 79452 00182 4
  • DSLD label 22323
  • Serving 4 capsules
  • 30 servings

Amino Acid Synergy by Designs for Health lists 11 ingredients, 11 with an amount per serving of 4 capsules, such as 14 mg of vitamin B-6, 338 mg of L-histidine, 338 mg of L-leucine and 300 mg of alpha-ketoglutarate. Its current label entered the NIH Dietary Supplement Label Database on June 25, 2013.

What is in Amino Acid Synergy?

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).

Amino Acid Synergy: Supplement Facts rows against the market (DSLD label 22323, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin B-6as Pyridoxal 5-PhosphateVitamin B-6 (Form: as Pyridoxal-5-Phosphate)14 mg700%Vitamin B6 in Amino Acid Synergy against 15,277 products14 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg14 mg

Higher than 67% of 15,277 products listing vitamin B6 (median 6 mg).

L-Histidine338 mgHistidine in Amino Acid Synergy against 591 products338 mg per serving; the middle half of products list 50 mg to 402.8 mg, the median 125 mg.338 mg

Higher than 66% of 591 products listing histidine (median 125 mg).

L-Leucine338 mgLeucine in Amino Acid Synergy against 2,056 products0.338 g per serving; the middle half of products list 1 g to 3.5 g, the median 2.5 g.0.338 g

86% of 2,056 products listing leucine give more (median 2.5 g).

Alpha-Ketoglutarate300 mgAlpha-Ketoglutarate in Amino Acid Synergy against 51 products300 mg per serving; the middle half of products list 50 mg to 300 mg, the median 150 mg.300 mg

Higher than 53% of 51 products listing alpha-ketoglutarate (median 150 mg).

L-Arginine300 mgArginine in Amino Acid Synergy against 1,455 products300 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.300 mg

64% of 1,455 products listing arginine give more (median 500 mg).

L-Lysine300 mgLysine in Amino Acid Synergy against 1,250 products300 mg per serving; the middle half of products list 148.25 mg to 996.25 mg, the median 500 mg.300 mg

60% of 1,250 products listing lysine give more (median 500 mg).

L-Phenylalanine300 mgPhenylalanine in Amino Acid Synergy against 611 products300 mg per serving; the middle half of products list 100 mg to 597.5 mg, the median 250 mg.300 mg

Higher than 55% of 611 products listing phenylalanine (median 250 mg).

L-Valine300 mgValine in Amino Acid Synergy against 1,632 products0.3 g per serving; the middle half of products list 0.5 g to 1.5 g, the median 1.25 g.0.3 g

82% of 1,632 products listing valine give more (median 1.25 g).

L-Isoleucine270 mgIsoleucine in Amino Acid Synergy against 1,614 products0.27 g per serving; the middle half of products list 0.5 g to 1.5 g, the median 1.23 g.0.27 g

83% of 1,614 products listing isoleucine give more (median 1.23 g).

L-Methionine270 mgMETHIONINE in Amino Acid Synergy against 981 products270 mg per serving; the middle half of products list 25 mg to 250 mg, the median 100 mg.270 mg

Higher than 76% of 981 products listing METHIONINE (median 100 mg).

L-Threonine270 mgTHREONINE in Amino Acid Synergy against 590 products270 mg per serving; the middle half of products list 140 mg to 886.25 mg, the median 500 mg.270 mg

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

Source: NIH ODS Dietary Supplement Label Database, label 22323 (entered June 25, 2013), 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 Amino Acid Synergy'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
Recommended Use: As a dietary supplement, take four capsules per day between meals, or as directed by your health care practitioner.
Warnings
KEEP OUT OF REACH OF CHILDREN.
Allergens and what it does not contain
Does not contain gluten.
Storage
STORE IN A COOL, DRY PLACE.

Source: label statements in DSLD label 22323.

What else is on the label?

Other ingredients: Microcrystalline Cellulose, Vegetable Stearate.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Guaranteed GMP COMPLIANT Products.

How many labels does Amino Acid Synergy have?

One label is on file, entered on June 25, 2013.

  1. Label 22323 (current) Entered June 25, 2013 · on the market · 120 vegetarian capsules · UPC 8 79452 00182 4

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

Who makes it?

The label names Designs for Health, Inc. (manufacturer, distributor), Suffield, CT. All Designs for Health products.

Where next?