If you check out youtube, there are a few nmn experiences. They report some benefits without trying to sell anything. One critic warns though. Nmn if overdosed

If you check out youtube, there are a few nmn experiences. They report some benefits without trying to sell anything. One critic warns though. Nmn if overdosed might suppress methylation which then can lead to shitty outcomes after a few weeks. Nmn is just refined vitamin b3, thiamine I think? That's why I decided to try b-complex first (no overdose ). I found it works fine, back pain diminished, mood feels stable.