After turning 30, I also noticed that the same habits that used to "work" were no longer effective. The classic advice — more exercise and fewer fast carbs — is correct, but sometimes it seems that the body slows down its metabolism on its own. I read a lot of scientific material and found https://ways2well.com/blog/benefits-of-stem-cell-treatment-for-weight-loss, which talks about using stem cells to improve processes in the body. They don't promise instant "fat burning," but they describe how such approaches can work at the metabolic level, affect inflammation, tissue repair, and help the body adapt to change.
After turning 30, I also noticed that the same habits that used to "work" were no longer effective. The classic advice — more exercise and fewer fast carbs — is correct, but sometimes it seems that the body slows down its metabolism on its own. I read a lot of scientific material and found https://ways2well.com/blog/benefits-of-stem-cell-treatment-for-weight-loss, which talks about using stem cells to improve processes in the body. They don't promise instant "fat burning," but they describe how such approaches can work at the metabolic level, affect inflammation, tissue repair, and help the body adapt to change.