I don't know if this is just a freak instance but the Muscle Pharm Fish Oil softgels caused me to have horrible night sweats. I would go to bed in boxers with no blankets and wake up covered in sweat. The doctor said that the fish oil was blocking my pores, causing my body to overheat while I slept. The sweats stopped once I stopped taking the softgels. Haven't introduced any brand of fishoil back into my diet since. Not blaming Muscle Pharm's product, it was probably just a crazy reaction.