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 Sep 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 Jul 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 Apr 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 Jun 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 Apr 08, 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 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!
Posted by TriedandTested on Sep 07, 2013 | Verified Purchase
I take 1 tablet twice a day in the hopes of increasing the amount of nutrients absorbed by my system, but I'm not sure if it's helped after taking this for 4 months.
Posted by Thoughtful-Reviews on Apr 29, 2013 | Verified Purchase
I didn't feel any increase in effect when I take this with my blood pressure meds. But that's not conclusive though, I would have to be more scientific about. Anyways ... research and clinical trials show a significant effect when taken with prescription meds ... so, please be forewarned when using this. The plus side is, if you already know that it /potentiates/ the effect of the drug you take, you can decrease its dosage while using BioPerine. Result? you save on your drug expenses! (You need first to know how it affects you though. And better -- consult with your MD). >>> To get more /Nuggets and Tips/ on products me and my family have actually bought and used... ... Click the link above [[Posted By Thoughtful-Reviews]]. Thanks for reading! <<<"