I mean, not all do? But in Japan, looking nice is a (really) common thing. I assume they just take really good care of their hair though. And the black, could be natural or dyed.
Recommend staying hydrated because chronic and prolonged diarrhea can result in severe dehydration. Plenty of water and even Gatorade can help reduce the chances of dehydration.
This can cause an ischemic stroke<span> and </span>hypertension<span> is the most important cause of this type of </span>stroke<span> and also transient ischemic attacks.</span>
There's vitamin B-12 (well, all vitamin Bs help), and vitamin D. I forget if there's more.
Hope this helped! :)