I took a lot of LSD twice within a 2 week period around this time two years ago. I got a lot of strong flashbacks but I assumed it was part of "the trip" and was natural and would go away. After taking LSD, I also tried ecstasy, xanax, and constantly smoked weed and drank, all of which I imagine made it worse. About a month after I went sober for non-HPPD reasons, which was about 8 months after I believe I first got HPPD, I started to realize something was very wrong and when other people couldn't helped I researched extensively online and have diagnosed myself with HPPD. I try to avoid caffeine and sometimes I exercise, though I'm not sure it helps with the HPPD very much. What do you mean by bad foods?