My father had throat cancer , no cigratte , no tobacco , no alcohol. We did radiology lights , 3 chemo. Then after every 2 months we did tests and reports are normal from last 6 months. But he is still loosing weight. Its 45 now and with lot of weakness. Last chemo was done in November 16. Even after 9 months there is lot of weakness and he feels extreme acidity. He is taking vitamin tablets as per recommendations , all fruit juices , proteins but because of acidity nothing is working. Please let know how to overcome this extreme weakness