Will it really bring out old injuries ?
in me yes it did. and you kinda might feel sick. but drinking more water always helped for me.
Can I drink peppermint tea ? etc. etc.
peppermint tea is ok. thats it. no caffine.
I also have a strange allergy to orange juice
you might be allergic to the stuff the put in orange juice rather than the juice itself. break with fresh squeezed and you should be good to go.