Taurine

Taurine is a 8.0–8.5/10 fit for people weighing cardiovascular, metabolic health, and sleep quality, especially when the goal is a tracked experiment with clear endpoints. The strongest evidence anchor is Systematic 2022: 5 RCTs and 209 participants; improved HbA1c, fasting blood sugar, and HOMA-IR in diabetic patients. Tzang 2024 adds a second signal, but Taurine still has gaps around large trials, long-term outcomes, responder profiles, or real-world adherence. That makes Taurine useful for a defined reader, while weaker for broad anti-aging or catch-all wellness claims. In practice, Taurine belongs after basics, diagnosis when relevant, and a stop rule based on symptoms, labs, sleep, or performance.

✅ Best for: Adults over 40 exploring low-cost cardiometabolic support; vegans and vegetarians with low taurine intake; prehypertensive adults adding taurine to exercise, sodium reduction, and sleep work; people with metabolic syndrome or type 2 diabetes using taurine as an adjunct to medical care; endurance athletes who want a legal ergogenic with low downside; sleep optimizers who respond to mild inhibitory support; heart-failure patients only with cardiologist approval and no substitution for guideline-directed therapy.

❌ Avoid if: You have end-stage renal disease, dialysis dependence, or unclear kidney function. You take lithium without clinician monitoring. You have active AML, CML, or MDS, where Sharma 2025 makes supplemental taurine a reasonable pause until human data clarify risk. Use caution if your SBP is already under 110 on medication, if you are pregnant or nursing without clinician guidance, or if you expect taurine to replace medical treatment for hypertension, heart failure, diabetes, cirrhosis fatigue, depression, or longevity.