Astragalus high dose longterm use

I think besides safety you really need to answer what it is you are trying to accomplish and whether or not that is really helping you. In my opinion, no one should be on any herbs regardless of safety issues over long periods of time without very good reasons and longevity is not one of them in my opinion.

I would focus far more on what -not- to do, rather than doing something in the vain attempt to overcome issues from other diet and lifestyle factors. So start with avoiding all the bad things, eating poorly, smoking, drinking, no exercise, high stress, etc., etc. Basically work on your diet, incorporate exercise, drink enough water, work towards emotional balance, etc. While I don’t agree with everything in the text, a decent place to start is the following two texts:

The above is general and the following is a more lengthy Chinese Medicine approach:

As far as safety, again, I strongly advise to only take things when they are necessary. Huang qi is generally considered safe, but at your dosage consistently there has been a few studies showing that those levels and above potentially weaken or at least disrupt the functioning of the immune system opening to illness and/or possibly autoimmune conditions. Again it all about proper balance and reasoning, nothing is infinitely good and nothing is inherently bad.