Consult a doctor or professional before fasting.
Most people can go 3 days without eating without any problem. You didn’t say how tall you are and that’s a huge factor. BMI is really what matters. If you are under weight as it is, I really wouldn’t suggest a fast. But if you do, like I said, consult with a professional cause there’s more that goes into it than “16 year old, 110 pounds”. And stay hydrated and don’t eat a lot right after or before, something called refeeding can happen and is potentially fatal.
