I know I read on here somewhere that getting the D-phen (have to special order and I did), works better for pain than the L-phenylalanine. Can someone advise if it really helps with pain and how to take it. They are the biggest horse pills I've ever seen! One is 1000mgs - is there a good time to take it? how often and how much is a good amount? I'm trying to find anything natural for my upper back pain. 3 Alleves help, but thought I'd try this amino acid too as it was highly recommended. I forget who suggested it. Anyone who knows about supplements, I would really like some advice. Thank you.