SLAB51 Probiotic: One Week Added 33 Seconds for Elite Athletes
One week of the multi-strain probiotic SLAB51 helped elite athletes last about 33 seconds longer on a treadmill test, but a single dose did nothing and VO2max didn't change. The randomized, double-blind crossover trial also found higher levels of the antioxidant enzyme SOD before exercise. So what is SLAB51, and why might gut bacteria influence endurance at all? This article breaks down the study design, the numbers, and what athletes can realistically take from them. It also covers the limits: a small sample of elite men and a very short intervention.
Astaxanthin for 4 Days Boosted Cycling Time-to-Exhaustion From 72 to 85 Minutes in a Small Trial
Four days of astaxanthin at 28 mg/day lengthened cycling time to exhaustion from about 72 to 85 minutes in a small randomized trial, a gain of roughly 18%. The same protocol blunted rises in muscle damage markers (CK and LDH) and lipid peroxidation (MDA) after a hard ride at 75% VO2max. Inflammation markers and fuel use did not change, so the mechanism is still unclear. The dose is also well above what many softgels provide, and the study had just ten young men. Here is what the numbers show and where the evidence stops.