When I was fasting (about 2.5 weeks), I ingested nothing but water. I don't think you need to be worried about running out of essential nutrients when you are o

When I was fasting (about 2.5 weeks), I ingested nothing but water. I don't think you need to be worried about running out of essential nutrients when you are only fasting for 3 days. Personal experience, of course. No empirical evidence.