Can't gain weight with food
Can't gain weight no matter how many times I eat but when I drink Guinness around one or two Cans a week, I usually gained around two KG within two weeks. I stop drinking Guinness 5 years ago because of kidney stone. I had it removed. I lost all the weight I gain from Guinness. I was 74 kg and when I stopped drinking Guinness, I went down to 68kg, I am 6 feet tall and never gain any weight since 5 years. Does anyone know what it means, why can I gain weight from normal food? I looked too skinny and when wearing T-shirts, you can see my collar bones. Me and my wife eat almost the same food, she gained weight but I can't. The only thing we eat different is coke. She drinks too much coke and I barely drink coke .