Safety
6 evidence-based guides on safety — backed by clinical research and scored in our catalog.
Supplement-Drug Interactions: The Complete 2026 Guide
The 4 mechanisms of supplement-drug interactions — absorption competition, CYP450 metabolism, potentiation, antagonism — plus the highest-risk supplement classes and how to check your stack safely.
Supplement Safety in 2026: What the FDA Doesn't Check
The FDA doesn't verify supplements for safety before sale. Here's the regulatory gap, the 3 failure modes, and how third-party certifications and interaction checks close the risk.
Third-Party Tested Supplements: USP vs NSF vs Informed Sport
Only ~1% of supplements carry USP Verified. This guide explains what each third-party certification tests, how to verify a mark is legitimate, and what to do when a product isn't certified.
Cold Plunge Benefits and Risks: What the Evidence Shows
Cold shock and drowning risk, what cold water does for mood and soreness, why plunging after lifting can blunt muscle growth, and who should avoid it.
Sauna Health Benefits and Risks: What the Finnish Studies Show
What the Finnish sauna studies found, the dose behind them, why the data are observational, infrared vs traditional, and who should be careful with heat.
Weighted Blankets: What the Trials Show for Sleep and Anxiety
One striking insomnia trial, one negative trial in autistic children, and a blinding problem in all of them. What weight to choose, the heat trade-off, and who should never use one.