In reply to paul walters: there are some lucky people who are just fine whatever they do, there are some unlucky people who are disabled, everyone else falls in between. Among other more embarrassing things I've got:
1)elbow tendonitis in left elbow,
2)Goosed left knee,
3)lower back pain for years,
4)stiff neck,
5)rapidly deteriorating eyesight,
6)the sleeping skills of a toddler which disrupt normal life, sometimes a bit sometimes a lot,
7)bowel trouble if I eat wheat, which I do cause it's yummy
8)stiff hips/hands/feet,
9)incredible inflexibility and lack of joint mobility, verging on party trick status
10)reynauds syndrome which makes my hands into zombie hands every winter.
in reality these things aren't such a big deal compared to what some have to put up with and if all else fails my right knee and elbow are still fine so I can always hop to the toilet in the middle of the night with my gloves on and grab a slice of heavily buttered toast on the way up, plus I'm quite an accomplished smoker and drinker so I'll have things to occupy me in the rest home/hospital.
There's always trouble if you look for it, and no doubt if you spend your life chasing special diets and exercise regimes you'll probably lose some symptoms but they'll be on your mind a lot more. Take comfort in the fact that you don't live forever, pop some profenq and try to put niggles to the back of your mind, they'll all come to an end at once some day!