I have tried several, and I mean several different kinds of powdered drink mixes, with high quality vitamins and or protein,(they claimed) for over 10 yrs. And never have I felt the benefits, like I have now in just a week or so. With PFPB , I had the afternoon slump, sometimes even napping when I could . I tried PFPB during a very stressful time in my life. And I was surprised it tasted good in my juice.( Im lactose intolerant.) And that first day I felt a little better not so down in the dumps. ( I was there for our best friends funeral) . I had used it a few days while there. came home forgot about it for 2 months. Then she reminded me. So I order it and have been using it for about 10 days. What a difference I feel, never feeling anything with the others I tried. I'm glad I found PFPB, finally Im feeling benefits I never did before. I tried to nap with my grandson last week. Was not feeling tired at all. Thanks PFPB this "59 yr old Grammy "has to much to do to be napping my day away.