Your favorite health food store has plenty of supplements. But trying to figure out which nutrient is the best – decoding them – can be tricky. Here is a codebook for three widely used and important supplemental ingredients. Vitamin: B6 (Pyridoxamine) What it is: There are various forms of Vitamin B6, including pyridoxine, pyridoxal-5-phosphate, and pyridoxamine. Where it comes …