Skip to Main Content
Sam's Club
Sam's Club
All Departments
All Services
Customer reviews for ONNIT Alpha BRAIN Nootropic Brain Health Supplement Capsules, 78 ct. for
ONNIT Alpha BRAIN Nootropic Brain Health Supplement Capsules, 78 ct.
3.8 out of 5 stars
stars
12K ratings11.9K reviews
  1. 5 stars52% (6,258)
  2. 4 stars15% (1,793)
  3. 3 stars10% (1,251)
  4. 2 stars7% (859)
  5. 1 star16% (1,909)

Member photos

Sort by |
Showing 2,121-2,130 of 11,986 reviews
Jan 14, 2024
Reviewer name: Timmermans
1 out of 5 stars
1 out of 5 stars review

Verified Purchase

Did nothing

I'm giving it 1 start because I didn't notice any changes to mental state or health after taking these. it's been about a month of taking it every day and I haven't noticed any changes to before I was taking them.

Review from onnit.com
Helpful?1KJFR6XS8BD413614914153
reply from Onnit Customer Service

​​Thanks for leaving a review about your experience with Alpha Brain! We’re bummed to hear that you didn’t have the experience that you expected while taking it. Being that we all have different needs, it's expected that we all respond to supplements a bit differently. Please feel free to reach out to us directly by emailing help@onnit.com if you need further assistance.

Jul 15, 2025
Reviewer name: Jorden
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Amazing product!

Amazing product, I take the Total Human day and night packs and it's made a noticable difference in my energy and mental clarity! I would highly recommend you try it!

Review from onnit.com
Helpful?1KJFR6XS8BD413614914153
May 28, 2021
Reviewer name: Jake Hempstead
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Works Fast! Very efficient!

Has worked as stated but have not personally experienced any side effects like others have stated! This is effective and why I am making a second purchase.

Review from onnit.com
Helpful?1KJFR6XS8BD413614914153
Aug 19, 2025
Reviewer name: Gabe O
1 out of 5 stars
1 out of 5 stars review

Verified Purchase

Alpha Brain rough on gut

This stuff was rough on my gut. Made me dizzy too. I don't have any food allergies or sensitivities so it was really surprising. Took a few days break and tried again not realizing the connection and it happened again.

Review from onnit.com
Helpful?1KJFR6XS8BD413614914153
reply from Onnit Customer Service

Thank you for sharing your experience with this formula, we’re sorry to hear that it wasn’t a positive one! Everyone's experience with supplementation is unique to them, and we would like to learn more about yours. You will be contacted by someone on our Customer Service team shortly so we can support you directly in this matter. -- Cailee B. ONNIT Customer Service Associate #getonnit

Feb 9, 2024
Reviewer name: Seth C
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Worth its weight in gold

Just like they said, this really helps with cognitive function. I now take it as part of a daily regimen to assist not only with focus but overall cognition.

Review from onnit.com
Helpful?1KJFR6XS8BD413614914153
Apr 21, 2022
Reviewer name: Lover of Onnit
1 out of 5 stars
1 out of 5 stars review

Verified Purchase

Unfortunate

I have noticed absolutely no difference. I would like to try more, but I ran out and it is too expensive to get more at this time. I follow Onnit and members and their journeys pretty closely, so this was very unexpected.

Review from onnit.com
Helpful?1KJFR6XS8BD413614914153
reply from Customer Experience

We appreciate you taking the time to leave some feedback! Sorry to hear that Alpha Brain didn't benefit you as you had hoped. Every person reacts differently to supplementation depending on the unique needs of your body, but we do appreciate you giving it a try! Feel free to reach out to our customer service team directly at help@onnit.com if you need any assistance!

Dec 4, 2019
Reviewer name: Austin123
2 out of 5 stars
2 out of 5 stars review

Verified Purchase

Ehh?

Great idea for a product but I saw no good results within the first 15 days of taking it. I feel that this may be another product relying on the placebo. I love the onnit brand but also feel as though I should be honest.

Review from onnit.com
Helpful?1KJFR6XS8BD413614914153
reply from Customer Experience

Hi there! We're sorry to hear that you didn't experience the results you expected with Alpha Brain! We know that this product will affect everyone a little bit differently depending on their needs. We appreciate you giving this product a try though and leaving us your feedback!

Apr 6, 2022
Reviewer name: Wilkinator
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Thank you so much

Alpha Brain is the elite Nootropic on the market and has genuinely changed my life in terms of my overall focus and mental endurance both at work and at home! Thank you Onnit Labs!

Review from onnit.com
Helpful?1KJFR6XS8BD413614914153
Apr 5, 2022
Reviewer name: Nater1234
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Memory and focus

Stuff works really well, makes my mind feel clear and focused. I fast throughout the day and find that taking 1 in the morning and 1 mid day works best and doesn’t overload me.

Review from onnit.com
Helpful?1KJFR6XS8BD413614914153
Aug 31, 2020
Reviewer name: amerk
4 out of 5 stars
4 out of 5 stars review

Verified Purchase

a little disapointed

I really just think it was a placebo affect for me and that faded after a while. I still take it to finished it off but don't really see any difference.

Review from onnit.com
Helpful?1KJFR6XS8BD413614914153