to be honest i highly dissuade any use of powerful stimulants to anyone just for the sheer carnage it plays on your body and how soul draining they can be. If you are responsible with your dose and only use a few/couple times a year then it’s not too bad but a 50-60 year old using some powerful stimulant is a recipe for heart attacks!! not saying kiwi is 50-60 but you get what i mean, there is an age to stop at when your body just becomes too fragile.