There is limited research available on the specific impact of protein powder on hormones and hormonal imbalances.
Whey protein has been shown to increase levels of insulin-like growth factor (IGF-1), which can affect levels of hormones like testosterone, estrogen, and cortisol. Some studies have found that consuming high amounts of whey protein can increase levels of sex hormone-binding globulin (SHBG), which regulates the bioavailability of testosterone and estrogen in the body.
Soy protein, on the other hand, contains phytoestrogens, which are compounds that can mimic the effects of estrogen in the body. Some studies have shown that consuming large amounts of soy protein can affect hormone levels and increase the risk of hormonal imbalances, particularly in women. However, more research is needed to fully understand the effects of soy protein on hormones.
Casein protein has not been extensively studied for its effects on hormones.
It is important to keep in mind that protein powder is not a hormone supplement and should not be relied upon as a treatment for hormonal imbalances. If you have concerns about how protein powder may be impacting your hormones, it is best to speak with a healthcare professional. Additionally, it is important to consider the overall quality and composition of the protein powder, as well as the amount and frequency of consumption, when evaluating its impact on hormones and hormonal imbalances.