i'm on mk long time use 4 differents brands Olympus / nutraplanet / focused / Chemtech-lab never had Those sides either,,, except water retention in carb day {them on keto most of the year} the negative sides are sleepless and if take before the bed mk gives me a boost of energy for a few hours ... positive fulnes solid muscle pump in the gym better recowery thats it .... i would say stop to chase the sidesWater Retention, Carpal Numbness, Hunger due to Ghrelin stimulation.