Let’s talk hair mineral testing and OATs (organic acid tests)—because I know, I know… everyone in the biomedical groups says these are the “must-have” tests. But here’s the thing: They were some of the first tests we had. That’s why they became so popular. But science evolves—and now we know better. Hair mineral analysis? Easily contaminated, impacted by hair texture, ethnicity, and external products. It’s dead tissue, and doesn’t reflect real-time nutrient status. Results vary between labs and