My 20 year old son has not felt well for past few weeks. Feels weak, lethargic, emptiness and hungry shortly after eating but feels full after eating half of what he usually eats. He is very thin, not very active. He does work a part time job. He felt he should begin exercising more and used a stationary bike at home a few times for 30 minutes . He lost six lbs and seems like that caused him to report his symptoms to me. Of course I told him with his low weight he should not use the bike to exercise. Today I bought him some protein drinks to try. I did schedule a appointment with a pcp but it s a first appointment and scheduled in July. He does not pay attention to his diet and not a fruit or vegetable eater. Made some smoothies which he liked but did not feel better.