ROFL!!!
Over 30 is over the hill? I was in the best shape of my life between the ages of 35 and 40. At 40, I caught a cold and it attacked my heart. That set me back a bit, but got back into good shape anyway. In my mid 40's I tore a rotator cuff and meniscus and that put the kabosh on things. No more weights and I gained weight. Its been a struggle since, but I eat right, exercise and medically I am in great shape except for the ticker. Like some said tho, everything hurts now, especially in the morning. Some days I cant put weight on my feet for a few mins cuz of the knee or the hip, or ankle or arches. All have been victims of overuse/abuse injuries through the years.
As far as alcohol, I just started having problems and becoming intolerant these last 4 years. I think its related to how high I was keeping my motabolism and the lower level now. Age, in my 50's, btw, is finally catching up to me. Now its two, maybe three pints once a week and I am done. That third pint is pushing it too. Some days I wake and feel like hell after 3. I will have A beer pulled from my tap between brew pub nites. One is very enjoyable without any repercussions.
So if you are under the age of 45 and you are suffering from low alcohol tolerance, how much exercise are you getting? When I was in my thirties, I ran 3 miles 7 days a week and lifted weights for an hour 6 days a week. I ate clean, no refined starches or sugars besides beer, and drank a ton of water.
My guess is most younger people who suffer like this are sedentary, eat lousy fast food, fried, lots of dairy, and dont flush their bodies. You might still be younger but you are not kids is all. No free rides on the metabolism train. Your livers and kidneys are getting overworked.