Hotasfrick didn't put any posts with an url or recommendation re any particular brands etc, if you are going to attack someone be prepared for a comment regardless of how busy they are & don't post things that aren't true about others!!
back to the original query!!

do supplemants provide energy? If no why?
Everyone is different & their needs are different as is the way they "use" supplements so - both answers depend on
1) what you take
2) how much
3) what you need
4) any health issues you have
5) any meds you're on
eg I have been severely anemic since early teens at least yet no matter what sort of iron supplement (injections, foods, tablets etc) I take it most if not all goes straight through - in other words my body doesn't absorb it no matter what I do or what I take with the iron. That's me, that doesn't mean it's you - you have to try & see what works for you & for your needs & lifestyle.