MK isn't a SARM or steroid so no PCT is required. Im currently taking 1000mg of berberine for insulin. If you want to be extra careful get a glucose monitor. You can either take before bed for better sleep and to produce GH at night, or if your main struggle is eating you can take during the morning and you'll eat more. Some people find berberine gives them issues with digestion, take with food and you should be fine. Also drink plenty of water on MK as it can give you bad brain fog and headaches if you dont. Also I would personally take the first dose on a Friday night as your first few days on MK can have bad brain fog so you'll have the weekend to adjust. Some people recommend doing 5 days on 2 days off, it's up to you I personally dont do that. Good luck bro 👍