Does fasting Ramadan negatively affect a 17-year-old patient with Gilbert's Syndrome? Is he allowed to break his fast, and what is the expiation for breaking the fast if allowed, or what are the necessary measures if not allowed?

The syndrome mentioned in the question, which affects the liver, requires consulting doctors to determine the effect of fasting on it. If they decide that fasting significantly impacts the patient's health, causing feared harm, or involves unbearable hardship, then the patient may break their fast. They should then make up for it if their illness is curable. If it is an incurable illness, then they transition from making up the fast to feeding the poor. In this case, they break their fast and feed a needy person for each day they missed, giving one mudd (750 grams of rice or similar staple). However, if doctors determine that fasting has no effect on the patient's condition and there is no unbearable hardship in fasting, then the patient is obligated to fast.