Customize Your Shopping Experience!

Please select the destination country, language, and currency you prefer.

Available Shipping Methods
Available Payment Methods
Added to Cart
Combo Discount:
View/Edit Cart Checkout
Cart Total:
Customers Also Bought:

iHerb Customer Reviews



Savings of: $22.83 (44% off)

Write a Review

Customer Ratings

5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Reviews | English
Sort By

Heart racing

Posted by Reviewer1294104 on Apr 30, 2016

Jarrow is a great brand, and this product is liked by many. However it seemed to cause my heart to race, perhaps that's due to lowering cortisol levels. I've seen a few random reviews on the net from others who have the same experience. I used to have low cortisol, supposed to have ok cortisol levels now and weaned off cortisol prescription medicine. Perhaps that's why it didn't suit me. I still use other Jarrow products.

Was this review helpful to you?

never try

Posted by Reviewer2421016 on Mar 22, 2016

Dare not to try as I have then bought a PS100 made of sunflower instead of soy like this one )I have thyroid problem).

Was this review helpful to you?

Ps 100

Posted by 5716070108748245562 on Mar 24, 2015

Wish it came in higher milligrams, but other wise Good

Was this review helpful to you?


Posted by 5586896955355261579 on Jan 03, 2014

Great product,very happy with the results. I will definitely purchase this product again.

Was this review helpful to you?


Posted by 5598825750161154114 on Dec 08, 2013


Was this review helpful to you?


Posted by 5194120670415258455 on Oct 16, 2013

Definitely lowers cortisol levels- I sleep like a baby when I have these! I'm also a lot more focused throughout the day and my memory is noticeably better.

Was this review helpful to you?

Cognitive enhancer

Posted by 5733307147921671762 on Oct 01, 2013

Feels like it's clearing my head pretty nicely. I'm only taking one in the morning and it makes my day somewhat more productive and less stressed. It's easier to grasp big complex systems at work. Doesn't seem to affect wakefulness that much. Need to continue testing more, but feels like a keeper already.

Was this review helpful to you?

1 person found the following review helpful

A letdown

Posted by Hypatia on Jun 03, 2013

I found this product does not work as well as the capsule or gelcaps by Doctor's Best.

Was this review helpful to you?

1 person found the following review helpful


Posted by Reviewer3125771 on Oct 26, 2012

It takes a week or two to build up, but highly effective when used with Jarrow's Alpha GPC.

Was this review helpful to you?

Highly Recommended

Posted by RubiesHealth on Jun 08, 2012

This is an excellent nutrient that supports cognitive performance and attentiveness. It is helpful for mental sluggishness and hyperactivity like ADHD. Though derived from soy, Jarrow's PS does not trigger my son's allergy to soy (skin rash) like a few other liquid PS formula do. It dissolves easily in water and can be administered to children who cannot swallow capsules.

Was this review helpful to you?

5 people found the following review helpful

Items 1-10 of 70 total

« Previous | 1 2 3 4 5 | Next »