I just take vitamins if needed, saves time and no cancer.

If you know something everyone else doesn't, it would be great to see your paper describing how you do that and demonstrating efficacy. So far, the evidence seems to suggest it's not sufficient: https://www.sciencedirect.com/science/article/pii/S0022202X2...

The tricky part is defining "needed".

After all, supplements are also artificial compounds

https://news.ycombinator.com/item?id=33584011