L-tyrosine supplements
L-tyrosine isn't 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. We still show each label's amount and directions, so you can see what you'd be taking.
Powders (2)
| Product | Per serving | Servings a day | Per day, as directed | Verdict | Proof |
|---|---|---|---|---|---|
| NutraBio L-Tyrosine · label 23 May 2024 | 500 mg in one serving | 1–2 servings | 500 mg–1 g | Not graded | Label claim only |
| Nutricost L-Tyrosine Powder · label 24 Oct 2024 | 1 g in 1 scoop (1 g) | 1 serving | 1 g | Not graded | Label claim only |
Capsules (8)
| Product | Per serving | Servings a day | Per day, as directed | Verdict | Proof |
|---|---|---|---|---|---|
| Doctor's Best L-Tyrosine 500 mg · label 22 Feb 2024 | 500 mg in 1 capsule | 1 serving | 500 mg | Not graded | Label claim only |
| Jarrow Formulas L-Tyrosine 500 mg · label 24 Jan 2024 | 500 mg in 1 capsule | 1 serving | 500 mg | Not graded | Label claim only |
| Momentous Tyrosine · label 22 Nov 2024 | 500 mg in 1 capsule | 1 serving | 500 mg | Not graded | NSF Certified for Sport |
| NOW L-Tyrosine 500 mg · label 20 Jun 2024 | 500 mg in 1 capsule | 1–3 servings | 500 mg–1.5 g | Not graded | Label claim only |
| Nutricost L-Tyrosine 500 mg · label 22 Feb 2024 | 500 mg in 1 capsule | 1 serving | 500 mg | Not graded | Label claim only |
| Pure Encapsulations L-Tyrosine · label 22 Nov 2023 | 500 mg in 1 capsule | 1–4 servings | 500 mg–2 g | Not graded | Label claim only |
| Swanson L-Tyrosine 500 mg · label 22 Mar 2023 | 500 mg in 1 capsule | 1 serving | 500 mg | Not graded | Label claim only |
| Thorne L-Tyrosine · label 24 May 2023 | 500 mg in 1 capsule | 3 servings | 1.5 g | Not graded | Label claim only |
Tablets (1)
| Product | Per serving | Servings a day | Per day, as directed | Verdict | Proof |
|---|---|---|---|---|---|
| Source Naturals L-Tyrosine 500 mg · label 23 Aug 2023 | 500 mg in 1 tablet | 1 serving | 500 mg | Not graded | Label claim only |
11 products. Where the directions give a range, the verdict judges the most they give in a day. Read the l-tyrosine guide for the studies behind the dose. "Proof" is a published independent lab test, a certifier listing we read on the certifier's own site (usually for listed lots only), or "Label claim only" when we found neither.