I have been taking a simple whey protein suplement after weight training recently, but I am having a strong reaction to it. Every time I eat/drink it I start to feel amped like I've had too much caffeine and I get an annoying headache.
Just to be clear, the only ingredients appear to be milk whey and soy products. There is no listing of caffeine or creatine or anything similar. Also, I only eat/drink about 100 calories worth at one time and I drink cow's milk every day without any problems.
If it matters, the full name of the product is "Dymatize Nutrition ISO 100 Hydrolyzed 100% Whey Protein Isolate".