Page 1 - Reviews - Jarrow Formulas, PS100, 100 mg, 60 Softgels - iHerb
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Customer Ratings & Reviews

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4.7
Based on 5,912 ratings
4,939
606
266
58
43
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What customers say
Customers have reported significant improvements in cognitive function, memory, and focus after using Jarrow Formulas' PS100. Many users appreciate the easy-to-swallow softgel format and the high quality of the product. Some have noticed better sleep and reduced cortisol levels when taking it in the evening. The supplement is praised for its effectiveness in enhancing mental clarity and managing stress. However, a few users experienced adverse effects such as headaches or kidney pain. Overall, Jarrow Formulas' PS100 is highly recommended for its positive impact on brain health and cognitive performance.
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BlackNova
Gold
Posted on Oct 27, 2025
Thailand
508
0
4
104
Verified purchase
Jarrow Formulas PS100 is a high-quality supplement that delivers phosphatidylserine in a reliable and well-formulated capsule. The ingredients are clean and focused, featuring 100 mg of phosphatidylserine per serving derived from sunflower lecithin, with no unnecessary fillers or artificial additives. The capsule size is small and easy to swallow, making daily use convenient. Overall, it offers excellent quality and consistent potency in a compact, user-friendly package.
iHerbCustomer
Posted on Oct 18, 2024
Philippines
2,107
0
0
61
Verified purchase
Thank you for providing such outstanding supplements! The quality is exceptional, with thoughtfully selected ingredients that offer remarkable health benefits. Your products have made a significant positive impact on my overall well-being. I also appreciate the secure and reliable packaging. Thanks again, iHerb!
Elka
Silver
Posted on Sep 25, 2025
Ukraine
155
0
0
41
Verified purchase
Helps me control my higher thrombocyte count in check. Apparently PS100 marks them for removal. My T count has been slightly elevated for years, with no objective reasons for it other than potential development of essential thrombocythemia (ET). I had an increased number of immature granulocytes (IG), which is not considered a solid marker of ET, yet it's not normal for them to be elevated. So PS100 normalized my IG count in the blood. With each subsequent test they disappeared. Hard to say what is going on, but I take it as a good sign and that it helps me stray away from the potential blood disease I was heading towards.
iHerb customer
Gold
Posted on Oct 13, 2025
Singapore
1,765
0
0
92
Verified purchase
I started taking this to help manage my stress levels, and it has made a noticeable difference in my ability to stay calm under pressure. My mind feels less cluttered, and I'm sleeping more soundly through the night. The softgels are small and easy to swallow with my other daily supplements. It's become an essential part of my routine for maintaining mental clarity and a sense of calm.
iHerbCustomer
Gold
Posted on Oct 3, 2025
Singapore
862
0
0
119
Nice
Verified purchase
Jarrow PS100 is a solid cognitive-support product. Great for someone who wants to support memory, focus, or mental stamina without strong stimulants. Especially useful during busy work periods, times with high mental load or stress. Good packaging and size. Best used with consistency (daily or near-daily), and paired with good sleep, diet, maybe other supportive nutrients (omega-3s, etc.). If you’re soy-sensitive, the clumping issues bother you, or you want faster-acting effects, you might look around at alternatives (especially sunflower-lecithin PS versions). Effect is gradual: It’s not an “instant brain boost” kind of product. Benefits (better memory, sharper thinking, less fog) show up only after consistent use. Taste is ok.
iHerbCustomer
Gold
Posted on Aug 29, 2025
Philippines
400
3
12
99
Soy‑Free PS That Sharpens Focus and Mental Stamina
Verified purchase
I’ve been taking Jarrow PS100 (Sharp‑PS Green) and I’m impressed. The sunflower‑derived phosphatidylserine is soy‑free, gluten free, and very gentle on my stomach. The softgels are small and easy to swallow, and the flexible dosing (1–3 daily with meals) lets me tailor for busy days. After about two weeks, I noticed clearer focus, smoother recall, and steadier mental energy through long work sessions—without jitters or a crash. Packaging is sturdy, labeling is clear, and quality feels consistent from a brand I trust. For straightforward cognitive support and brain health maintenance, this PS100 delivers real, noticeable benefits and fits effortlessly into my routine.
SomebodyAlex
Silver
Posted on Mar 23, 2022
290
57
2
61
Verified purchase
Phosphatidylserine is a supplement I take for better cognitive functions. It definitely improves memory and focus as well as short-term awareness. Effect is lasting also if one stops with Phosphatidylserine. Jarrow brand has a budget option at a great price as other brands are more pricy. Dosage is fine but 30 softgels run out fast as, to begin with, one needs to take more of them. Ingredients or source of Phosphatidylserine is safe sourced from sunflower. The size of softgels is convenient and easy to consume
Greenhue
Posted on Jan 20, 2026
United States
62
0
0
1
Great product!
Verified purchase
Great product! Have been taking it for many years and it helps!
Ay
Silver
Posted on Mar 21, 2024
Germany
127
0
154
90
Effective and High-Quality Phosphatidylserine Supplement
Verified purchase
I recently tried the "Jarrow Formulas, PS 100, Phosphatidylserine" supplements, and I must say, I am highly impressed with the results. This product has proven to be both effective and of excellent quality. The soft gel pills are convenient to take and have a smooth texture, making them easy to swallow. I appreciate the thoughtfulness put into the design of the pills, as they are gentle on the stomach and do not cause any discomfort after consumption. As for the effectiveness of the supplement, I have noticed a significant improvement in my cognitive function and overall mental clarity since incorporating it into my daily routine. Whether it's enhancing focus during work hours or supporting memory recall, this product has consistently delivered positive results. What sets this supplement apart is its high-quality formulation. Jarrow Formulas is known for its commitment to using premium ingredients, and the PS 100 Phosphatidylserine supplement is no exception. 30 soft gels can be a good amount for trying out a new supplement and assessing its effectiveness for personal use. It allows for a sufficient duration to gauge how well the product works for you without committing to a larger quantity upfront. This size is often ideal for product testing or for those who prefer to purchase smaller quantities initially. It's a practical approach to ensure that the supplement meets your needs and expectations before making a more substantial purchase.
iHerb customer
Posted on Apr 18, 2026
Saudi Arabia
75
0
0
0
Прекрасно!
Verified purchase
Quality is super! The ingredients are great! Size arranged! What you need! Performance is felt! the product arranged, perfectly packed, the effect is definitely there! I will order more! Just as quickly delivered