Related Articles

Brand Investigation
Brand Investigation C grade
21st Century HealthCare ("21st Century")
The Value Workhorse: solid in-house GMPs, sparse public testing
21st Century HealthCare ("21st Century")

Supplement Guide
Supplement Guide Robust evidence
Vitamin D3 (cholecalciferol)
Berlin, winter of 1919. A pediatrician wheels a mercury-vapor lamp beside a child with bowed legs; weeks later, the bones harden and straighten....
Vitamin D3

Supplement Guide
Supplement Guide Robust evidence
Zinc
Zinc refused to give up its secrets. For centuries, metalworkers could smelt copper, tin, iron, and lead with a hot fire. Zinc wouldn't cooperate—it slipped...
Zinc

