There are threads on many forums where people ask about the comparison of arimidex vs arimistane and whether it's worth comparing the two at all. Arimidex is a prescription hashish designed to control estrogen levels. Arimistane is a natural aromatase inhibitor, an over-the-counter sports supplement taken after a cycle to reduce estrogen levels and correct hormonal levels. It's gentler than Arimidex, and at the same time controls testosterone levels. The first drug actually contains a lot of pharmaceuticals, the second is a little lighter and is aimed at athletes.
Probiotics may be relevant after antibiotics or with gastrointestinal problems, but as a permanent supplement, they are not always needed. Protein powders are more of a convenience for those who do not get enough protein from food, rather than a must-have for health. Ideally, it's better to first take tests, understand what is really missing, and only then add supplements.