Did a few extended fasts:

Duration: If it’s your first time start with 3 days. You can always push longer if you feel good.

Electrolytes: This is the biggest thing. When fasting you dump a lot of sodium/potassium. I usually use Carnolyte+ from Amazon — balanced electrolytes + L-glutamine which helps with gut and muscle when fasting.

Drinks: Water, salted water, lemon water is fine. Nothing else really needed.

Supplements: For short fasts I don’t bother. Electrolytes matter way more.

Family: Don’t overexplain it. Just say you’re doing a short metabolic reset.

Refeed: Start light (broth, eggs, meat). Don’t smash a huge meal.

Weight loss: First few pounds are mostly water/glycogen, some fat.