Hi,
I felt benefit/differences the next day, I was practising shitting like it was a olympic sport, and I was no1!!
Had a few tummy niggles for around 3-4 days, but best benefit was after about 48 hrs, when I stopped feeling hungry all the time, but masses of energy had the 3 o'clock blue before this, repeated blood tests showed nothing untoward.
I use ACAI 1500MG tabs, two a day, with 20ml of ACAI super fruit juice from H&B.
I would gladly pay twice the price due to the benefits I've noticed myself.
Very important do make sure you eat, don't skimp.
My mum now has me get ACAI drink from Waitrose, and swears by it, at least 6-7 people have started on this since I have and only one reports no effect positive or otherwise, but she's very fit anyway, as a workout freak, has ace diet etc etc, all others reported benefits such that they are encouraging others, and still continue to take themselves.
tabetha