Metabolism Changes

Is there a safe and natural way to boost my metabolism?
I have dieted throughout the last year on and off and i think i have really changed my metabolism. I can’t eat very big portions of anything, i can usually only eat a little bit. Most foods really upset my stomach if i don’t eat very little amounts of them.
I do exercise every day.
Is there a way that i can bring my metabolism back to a little more regular?
You can boost it with green tea.
Metabolic Complications # 1

Metabolism Masterclass