Source Naturals · Taurine · Capsules
Is Source Naturals Taurine 1000 underdosed?
1 serving = 1 capsuleDirections: 1 serving a dayLabel as of 25 Sep 2023 · NIH DSLD
Verdict
1 g per servingone dose · studies use 1–6 g of taurine
Effective doseOne serving contains 1 g; studies use 1–6 g in one dose before training. The label's directions allow 1 serving a day.
One capsule gives 1 g, enough on its own for the low end of what studies use (1 g); it ranks 10th of 13 taurine supplements here by dose.
What the label says
- Taurine per serving
- 1 g in 1 capsule
- Servings a day
- 1 serving a day
- Taurine a day, as directed
- 1 g
- Research dose
- 1–6 g Evidence: Moderate
Suggested Use: 1 capsule daily.
More about taurine: forms, timing and the studies behind the dose.
Same category, compared
All 13 taurine supplements we checked, ranked by dose (commission never changes the order). Studies use 1–6 g of taurine; servings counted to 1 g.
| Product | Per serving | Servings to reach it | Form |
|---|---|---|---|
| BulkSupplements Taurine Powder | 2 g | 1 or less | Powders |
| Nutricost Taurine Powder | 2 g | 1 or less | Powders |
| Amazing Formulas Taurine 1,000 mg | 1 g | 1 or less | Capsules |
| Jarrow Formulas Taurine 1000 mg | 1 g | 1 or less | Capsules |
| NOW Taurine 1,000 mg Capsules | 1 g | 1 or less | Capsules |
| NutraBio Taurine Powder | 1 g | 1 or less | Powders |
| Nutricost Taurine 1,000 mg Capsules | 1 g | 1 or less | Capsules |
| Pure Encapsulations Taurine 1,000 mg | 1 g | 1 or less | Capsules |
| Puritan's Pride L-Taurine 1000 mg | 1 g | 1 or less | Tablets |
| Source Naturals Taurine 1000 (this product) | 1 g | 1 or less | Capsules |
| NOW Taurine 500 mg Capsules | 500 mg | 2 at once | Capsules |
| Swanson Taurine 500 mg | 500 mg | 2 at once | Capsules |
| Thorne Taurine | 500 mg | 2 at once | Capsules |
Where the reference doses come from
- Taurine, 1–6 g: Deng et al., 2025; Waldron et al., 2018.
- Label data: National Institutes of Health, Office of Dietary Supplements. Dietary Supplement Label Database, 2026. https://dsld.od.nih.gov/. Label 296296, including its servings a day.
For a supplement taken as one dose we judge one serving, and show the most the label allows in a day. Read the full methodology or the corrections log.