Have bought and used this product for several years now, and not sure if it actually makes any health improvement, tho I certainly like the idea that it might.  I tend to take it when I feel "low" or sluggish or tired for no obvious reason.  And always about a half teaspoon with water or weak tea.  No complains about it and no proof that it helps my health, just like the idea of it.  Another use by mixing it with coconut oil in a jar to rub into back of hands that get dry from outdoor gardening.