I know a lot of people love MOTS-c, but there is a lot of reporting that some people using MOTS-c experience fatigue, lack of energy, and brain fog. This is often discounted by those that MOTS-c works well for, but there is a common mutation that many of us in North America have that impacts MOTS-c and causes these side effects. Here's the article I wrote to explain it. https://medium.com/understanding-peptides/a-common-mutation-impacting-mots-c-473660a8ee76