A nutrition scientist on the best taurine supplements: 1 to 3 g a day, the honest gap between the mouse aging data and humans, and why you should not overpay.

Prebiotics vs probiotics vs synbiotics, sorted by a dietitian: what each one is, who benefits, and which to reach for first. See what the evidence supports.

NMN vs NR bioavailability compared with niacinamide and nicotinic acid. Honest cost-per-NAD+ math, pathway biochemistry, and which precursor is worth buying.

A nutrition scientist grades the longevity supplement aisle by evidence tier: which molecules have human RCTs, which are animal-only, and which are hype.

A registered dietitian compares shelf-stable vs refrigerated probiotics: what cold storage actually protects, when it matters, and how to read the CFU-at-expiry label.