L-Taurine
What it’s good for
L-Taurine for High Blood Pressure
Strong3 studies · 3 supporting · 0 against
Taurine is thought to lower blood pressure by improving how well blood vessels relax (endothelial function), reducing vascular resistance, and modulating sodium/calcium handling in vascular smooth muscle and the kidney.
Dose: 1600–2400 mg
Tested as: oral taurine powder/capsules, 1.6-2.4 g/day, no special form specified (not a manufacturer-branded taurine ingredient)
L-Taurine for Chronic Fatigue
No Benefit1 study · 0 supporting · 1 against
How it was tested: 8 acute, single-dose, double-blind crossover RCTs in 244 healthy adults testing taurine alone. Any positive mood/well-being effects were minor, inconsistent, and typically only appeared when taurine was combined with caffeine, exercise, or sleep deprivation; one trial found lowered vigor after taurine alone. Two of five authors disclosed unrelated funding from a taurine supplement manufacturer (Viridian Nutrition) for other work.
Proposed roles in mitochondrial function and antioxidant defense give a plausible rationale for an energy/fatigue effect, but this has not translated into a validated standalone human effect.
Tested as: oral taurine alone, acute single doses (not chronic daily dosing), tested in isolation from caffeine/exercise/sleep-deprivation contexts