Chest pain on&off. tested for low iron. results normal (iron 62, ferrin 5). however low blood glucose of 56. (did not fast). age 25, why low glucose?

Hmm... different lab: Ferritin 5 is awfully low at every lab I've ever seen. Hypoglycemia can occur from medicines, starvation, a LOT of exercise, paradoxically from obesity and insulin insensitivity (so more is put out and the body eventually overreacts to it), elevated insulin levels (very very rare). or.. no clear cause (most common and common in your demographic group).