BUYING GUIDES
Before You Buy
What to look for (and avoid) when buying supplements. Evidence-based guides to help you shop smarter, not harder.
47,000+ trials analyzed
5 guides live
No affiliate links - just honest info
Before You Buy Magnesium
Glycinate vs citrate vs oxide - which form actually works
33,000/month searches
Skip oxide
Before You Buy Omega-3 / Fish Oil
How to read labels and avoid rancid oil
27,000/month searches
Triglyceride form
Before You Buy Vitamin D
D3 vs D2 and why it matters
40,000/month searches
D3 always
Before You Buy Zinc
Why more is definitely not better
22,000/month searches
15-30mg max
Before You Buy Probiotics
Why strain matters more than CFU count
35,000/month searches
Strains > billions