Sports nutrition · Signature Supplements
9 Essential Amino Acids
Why Signature Supplements essential amino acids?
- 190 mg leucine per serving
- No: chemical fillers or binders, artificial coloring, artificial flavor, preservatives, yeast, corn, milk or milk derivatives, lactose, salt, sodium, soy, sugar, gluten, starch or wheat.
From the label’s panel and printed marks — not its marketing.
Supplement Facts
Serving size 2 Capsule(s)
Leucine190 mg
Lysine150 mg
Phenylalanine119 mg
Valine97 mg
Threonine97 mg
Methionine97 mg
Isoleucine97 mg
Full panel ↓Sold as food, not medicine — no regulator checked that it works
Per serving · 2 Capsule(s)
At a glance
From the label as printed · NIH DSLD
Protein powder · Capsule
Per serving190 mg leucine
50 servings per container
For adults, take 2 capsules up to three times a day with or without food.
One serving: 2 Capsule(s)
As a reminder, discuss the supplements and medications you take with your health care providers.
All warnings ↓No third-party testing mark on the label
Marks like NSF Certified for Sport or Informed Sport mean batches are tested for banned substances. Their absence does not mean a product is contaminated — only that nobody independent has said it isn’t.
- Sports nutrition — claims are the manufacturer’s
- No: chemical fillers or binders, artificial coloring, artificial flavor, preservatives, yeast, corn, milk or milk derivatives, lactose, salt, sodium, soy, sugar, gluten, starch or wheat.
- Adult (18 - 50 Years)
Supplement Facts
Supplement Facts
Serving size 2 Capsule(s)
Servings per container 50
| Amount per serving | % DV | |
|---|---|---|
| Leucine | 190 mg | † |
| Lysine | 150 mg | † |
| Phenylalanine | 119 mg | † |
| Valine | 97 mg | † |
| Threonine | 97 mg | † |
| Methionine | 97 mg | † |
| Isoleucine | 97 mg | † |
| Histidine | 52 mg | † |
| Tryptophan | 22 mg | † |
† Daily Value not established.
Other ingredients: Cellulose, Diatomaceous Earth
Transcribed from the label by the NIH Office of Dietary Supplements. What a label says is not independently verified. See the original label
How to take it
- Directions: For adults, take 2 capsules up to three times a day with or without food.
The manufacturer’s directions, from the label.
Warnings on the label
- As a reminder, discuss the supplements and medications you take with your health care providers.
- Warning: Pregnant or lactating women should consult a doctor before using any product.
- Discontinue use and consult your doctor if any adverse reactions occur, such as gastrointestinal discomfort or any allergic reaction.
What no one has checked
Contents are declared by the manufacturer and are not verified by a regulator. Independent testing has repeatedly found amounts that differ from the label, and products that contain substances banned in sport. Third-party certification, where a product has it, is shown on this page.
Compare with similar products
Details
| Brand | Signature Supplements |
|---|---|
| NIH label ID | 338587 |
| Label recorded | 2025-09-25 |
Source: Dietary Supplement Label Database · NIH Office of Dietary Supplements · retrieved 2026-09-21 · not reviewed by a nutrition professional