you ask "is it a good price to jump in at $170.00"
i say
that depends on your time frame
and ask yourself a few simple questions
one, is the world's population getting more or less concerned about their health?
if your answer is more concerned, then you would have to assume that they will look to buy more products that they think will benefit their health, e.g. Vitamins
two, is the world's population aging?
if your answer is yes, then you would have to assume that they would be buying more "health" related products
three, is China's population getting richer or poorer?
if your answer is richer then they would have more disposable income
just my thoughts, but it all depends on your time frame