Age doesn't matter, it's subjective.
But it's still a good idea to wait till your 20's before dwelling into psychedelics.
It seems the world is naturally more new when you're younger, a psychedelic can wait for the fragile mind.
Resreaching them is typically done by older people, so younger people take them not expecting they might be really profound and not a toy to play with.
I dropped acid for the first time at the age of 16....
Looking back on it, it will soon be 2 years since the first time i dropped. The experience was profound, overwhelming, insanity, beautiful, and the most meaningful experience of my life. I do not regret it, if i could go back i would do it again in a heart beat....
Fragile is not necessarily a bad thing, i was shaken to the core after that trip... i hardly spoke for days, there were things that needed to be sorted out but after it was all said and done i was a happier person. Before that trip, and to go back farther smoking weed i was pretty depressed, there was no real reason. I lived in a decent house, decent family, i had friends, and school was going decently well, but for some reason i hated my life. It was the same shit, different day. No light at the end of the tunnel, no end to the monotony.... Smoking weed filled the hole in my life to an extent, enough for me to eventually consider myself to be in a decent enough mindset to try acid. After that first trip i was happy to simply be alive, i saw the light. I saw that there was so much to be happy for, i started to appreciate friends, family, and life more....
I did research it before trying it, i read practically everything i could and i thought i knew what to expect, but i was completly wrong... Words just don't do the experience justice....