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 iHerb Customer on September 12 2008 | Verified Purchase
Excellent product and price, it enhances bioavailability of all it is combined with, not found at most sites, will buy continually, great choice by iHerb a great site
Posted by iHerb Customer on July 11 2008 | Verified Purchase
Bioperine works as advertised. It speeds up and intensifies absorption of nutrients, or whatever, you take with it.
Posted by iHerb Customer on May 18 2008 | Verified Purchase
I use this to enhance absorption of certain compounds
Posted by iHerb Customer on April 27 2010 | Verified Purchase
So far excellent. I really feel the difference including this along with my daily vitamin supplements.
Posted by iHerb Customer on May 13 2010 | Verified Purchase
Supposed to wildly increase the adsorption of Curcumin and perhaps other supplements
Posted by trefoglio on June 28 2012 | Verified Purchase
BioPerine is absorber of curcumin from turmeric. However, this product contain magnesium stearate that is not healthy and can in fact make absorption of all nutrients more difficult. I'm currently looking for BioPerine without magnesium stearate.
Posted by iHerb Customer on November 30 2017 | Verified Purchase
SUPER! Iam not hungry anymore!
Posted by iHerb Customer on April 8 2017 | Verified Purchase
If you take supplements this is a must have. BioPerine is a chemical that increases the absorption of supplements. Some supplements include BioPerine but most do not.
Posted by OrganicGirl on December 6 2013 | Verified Purchase
I use it to increase Turmeric absorbtion. Feel free to visit my page (click on my name) for more reviews.
Posted by iHerb Customer on May 23 2012 | Verified Purchase
Since I'´m taking quite a few supplements I can't honestly say that I feel the effect from BioPerine distinctively. However, I know that the bio availbility is enhanced, and reading the label etc here, I´m confident that this offering from Source Naturals must be one of the very best. Recommended!