This is a real risk and why supplementation is probably not a good idea except for like specific conditions as recommended by your doctor (e.g pregnancy). In an

This is a real risk and why supplementation is probably not a good idea except for like specific conditions as recommended by your doctor (e.g pregnancy). In an unregulated space like this, it's basically impossible to know what you're getting which can range from ineffective to seriously harmful (heavy metals, toxins, or active pharmaceuticals). Better to get micronutrients from bio-available sources and optimize diet, sleep, and exercise. It's also relatively expensive compared to the usually marginal benefit. Most likely you should sock away that spend into an index so you can afford the more effective and expensive therapies that our healthcare system doesn't give you access to (because it generally won't pay for prevention).