Depends if it’s your first time or not. Should be taken 6-8 weeks on with 2 weeks off. Look up mots - c dosage protocols. Normally you start with no more then 5 mg a week split into 2-3 doses. Some will say even less. Then the next cycle you can go littler higher then so forth. Me personally i did 1st cycle 5 mg a week. The next 1 I was up to 15 mg. Now I take up to 5 mg M-F. You can actually take up to 10mg 2-3x weekly safely. lol I’ve never gone up that far. I havent really noticed a difference physically but energy wise is absolutely noticeable.
If taking it to lose fat obviously I’d recommend taking it before fasted cardio or fasted in the morning and obviously make sure you’re in a caloric deficit or else you won’t really notice much physically especially if you’re trying to gain muscle. It’s honestly the pointless to take unless you’re just using it for the energy. You won’t get physical results if you’re in a surplus.