The first day I took Bioperine I in the morning, with my vitamins and with my treatment (designed for regulate my heart beats). My pulses decreased falling from 60 to 48. SO ... What I'm saying here is there was a side effect because my treatment was more efficient and every one who's taking piperine extract should be aware of that. And obviously, Bioperine is increasing bio availibility, and here's a proof it's working on a larger scale. As for a secondary benefit, I'm taking now half a pill of my treatment and it seems to be working properly. So just take care and be aware it could happen for you on molecules you're taking for your desease, not only vitamins are concerned here. Bioperine is doing exactly what it's designed for, perhaps too much better, that's why I rated 5 stars.
Posted by DesertWolf on Sep 19, 2016 | Verified Purchase
Taken 5 minutes before taking other supplements helps the body absorb and process more efficiently.
Posted by iHerb Customer on Aug 30, 2016 | Verified Purchase
Works as promised. I certainly can testify to that.
Posted by iHerb Customer on Aug 25, 2016 | Verified Purchase
Posted by iHerb Customer on Jun 21, 2016 | Verified Purchase
Good value product - enhances the body's absorption of nutrients in other supplements taken
Posted by iHerb Customer on Jun 13, 2016 | Verified Purchase
Posted by iHerb Customer on Jan 22, 2015 | Verified Purchase
It is great if you use other supplements.
Posted by iHerb Customer on Sep 09, 2014 | Verified Purchase
Should be taken by everyone to increase absorption of the vitamins you take.
Posted by iHerb Customer on May 27, 2014 | Verified Purchase
Great complementary supplement, if you want to get maximum from your other supplements. The main reason why I bought bioperine here, is because here, in Czech Republic, it isn't available for any reasonable price. I appreciate the short time of delivery and the quality of packing.
Posted by iHerb Customer on Apr 25, 2014 | Verified Purchase
This is my second purchase. While I cannot really tell that it increases my other supplements effectiveness, I can taste the hotness that black pepper can have. Since the price is good and it could be helping I continue to take it.
Posted by OrganicGirl on Dec 06, 2013 | Verified Purchase
I use it to increase Turmeric absorbtion. Feel free to visit my page (click on my name) for more reviews.