Many healthy people lack vitamin D and glutathione. Basically, most sick people are deficient in both of those compounds. What is the mistake that I see quite often is that medical specialists and dietitians focus on vitamin D only. At the same time they are forgetting about glutathione.
Why is that matter? Glutathione works together with vitamin D. Without vitamin D glutathione can’t be metabolized properly and you can know about that from another article. In here, I’ll tell you a bit why vitamin D can’t be produced, metabolism, and finally activated to biologically active form when you lack glutathione.