I don't know what my allergic reaction was to, but one thing is for sure....I ain't cycling ever again. I broke out in hives and itched like a ****ing mad man for 10 days!!!! **** thats hit. I have had my juices worth...Plenty of cycles under my belt, plenty of pounds gained and now it is time to go all natural. Maybe a test E cycle later down the line if I don't have a reaction to the ****.