NutraBio · L-tyrosine · Powder
Is NutraBio L-Tyrosine underdosed?
Directions: 1–2 servings a dayLabel as of 23 May 2024 · NIH DSLD
Verdict
500 mg–1 g a dayas the label directs
Not gradedContains 1 g. Not graded: a 2023 meta-analysis found no effect on endurance; its evidence is for focus under stress, at about 150 mg per kg of bodyweight.
One serving gives 500 mg.
What the label says
- L-Tyrosine per serving
- 500 mg in one serving
- Servings a day
- 1–2 servings a day
- L-Tyrosine a day, as directed
- 500 mg–1 g
- Research dose
- Not graded Evidence: Not graded
Suggested use: As a dietary supplement, take 1 or 2 scoop(s) mixed into your favorite beverage on an empty stomach, or as directed by your physician.
More about l-tyrosine: forms, timing and the studies behind the dose.
Same category, compared
All 11 L-tyrosine supplements we checked, ranked by dose (commission never changes the order).
| Product | Per serving | Form |
|---|---|---|
| Doctor's Best L-Tyrosine 500 mg | 500 mg | Capsules |
| Jarrow Formulas L-Tyrosine 500 mg | 500 mg | Capsules |
| Momentous Tyrosine | 500 mg | Capsules |
| NOW L-Tyrosine 500 mg | 500 mg | Capsules |
| NutraBio L-Tyrosine (this product) | 500 mg | Powders |
| Nutricost L-Tyrosine 500 mg | 500 mg | Capsules |
| Nutricost L-Tyrosine Powder | 1 g | Powders |
| Pure Encapsulations L-Tyrosine | 500 mg | Capsules |
| Source Naturals L-Tyrosine 500 mg | 500 mg | Tablets |
| Swanson L-Tyrosine 500 mg | 500 mg | Capsules |
| Thorne L-Tyrosine | 500 mg | Capsules |
Where the reference doses come from
- L-Tyrosine, : .
- Label data: National Institutes of Health, Office of Dietary Supplements. Dietary Supplement Label Database, 2026. https://dsld.od.nih.gov/. Label 309340, including its servings a day.
For a supplement taken every day we judge the most the label's directions give in a day, and show the least. Read the full methodology or the corrections log.