Hair is also part of our skin and add to beauty. This is also a barometer of health. However, many bald men are otherwise quite healthy. also every one has lower hair growth as he grows old. 

Baldness is also hereditary so people with good health could also be bald and of course one cannot stop ageing , one can only delay it by adapting a healthy lifestyle.. But all in all good health reflects in our skin as well as hair..

I am a Baldie. No health  problems whatsoever. Normal BP. Full of energy which makes me work for 8- 10 hours untiringly, Weight is constant for the last one decade, no sugar. If at all any health problems created by lack of hair, they can be neutralized by Yoga, healthy food habits, having sound sleep. It is no exaggeration if I say i never visited any doctor in the recent past.

Like our skin, our hair too is a barometer for our overall health, A healthy body has a healthy head of hair and vice versa..Our hair reacts swiftly to any changes in diet, climate , hormonal imbalance and illness..Baldness too could be linked to your diet !

http://www.details.com/body-health/diet/201203/is-your-diet-making-you-bald-hair-statistics

Yes. definitely. One becomes a baldy due wrong food habits and lack of care. Hair to grow copiously you should have. Iron, Zinc and Biotin are essential in foods you eat.

http://blog.healthkismet.com/eating-for-healthy-hair