There is no evidence to suggest that BCAAs (branched-chain amino acids) can cause kidney damage in healthy individuals when consumed in normal amounts. In fact, BCAAs are important for muscle protein synthesis and are typically well-tolerated by the body.
However, in individuals with pre-existing kidney conditions or those with compromised kidney function, it's possible that high levels of BCAAs could potentially be harmful. This is because the kidneys are responsible for filtering and removing waste products from the body, and high levels of certain substances, including BCAAs, can put extra strain on the kidneys.
If you have a pre-existing kidney condition or are experiencing any kidney-related symptoms, it's important to consult with a healthcare professional before taking any supplements, including BCAAs. Additionally, it's always a good idea to follow the recommended dosage guidelines for any supplement and to drink plenty of water to help support healthy kidney function.