Page 1 - Reviews - Force Factor, L-Arginine, 150 Capsules - iHerb
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Customer Ratings & Reviews

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4.7
Based on 2,574 ratings
2,082
331
108
31
22
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What customers say
Force Factor L-Arginine, available in a bottle of 150 capsules with a 600 mg dosage per capsule, is highly praised for its quality and effectiveness. Customers appreciate the convenience of the large package and the moderate dosage, which supports cardiovascular health and enhances athletic performance. Many users report improved blood flow, increased energy levels, and better workout results. The supplement is noted for its high-quality ingredients and good packaging. However, some find taking five large capsules at once to be cumbersome. Overall, it is well-received for its benefits in fitness and general well-being.
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Tatangclan
Posted on Jun 30, 2025
Australia
22
1
2
8
Take it with care.
Verified purchase
I gave this L-Arginine supplement a try, but unfortunately, I had to stop taking it—even at low doses. It worsened my asthma, gave me stomach aches, and made me feel dizzy. This might just be my personal reaction, but I recommend checking the potential side effects and speaking with a healthcare professional before starting this supplement.
vera
Posted on Jan 4, 2026
Netherlands
66
0
0
7
Noticeable boost
Verified purchase
Started taking this daily and felt better pumps and circulation within a week. Capsules are easy to swallow, no stomach issues. Not a miracle, but a solid, reliable L-arginine supplement.
iHerb customer
Posted on Jul 6, 2025
Poland
10
3
2
4
Noticeable Energy and Pump – Solid L-Arginine Support
Verified purchase
I’ve been using Force Factor L-Arginine for a few weeks now, and the results are consistent and impressive. The formula provides a solid dose of L-Arginine, which is known to support nitric oxide production, improving blood flow, stamina, and vascular performance. I primarily take it before workouts and sometimes on an empty stomach in the morning — and I definitely notice better muscle pumps, a slight energy boost, and improved endurance during cardio and lifting. What’s nice is that it doesn’t cause any jitters or crashes like caffeine-based pre-workouts. It also seems to support circulation in general — not just during exercise. I’ve felt a bit more focused and alert, possibly due to better oxygen flow. Capsules are easy to take, and I haven’t experienced any digestive discomfort or bloating, which sometimes happens with other nitric oxide boosters. High quality as well.
cbdc8153-6072-46c4-8b1a-58a4c72bf32d
iHerb customer
Posted on Jun 18, 2025
United States
6
1
0
1
Really helpful
Verified purchase
My muscles tend to get very sore even after light workout, but when I take this supplement along with glutamine, I notice a significant improvement in recovery time. If I had to mention one downside, it would be that the serving size is five capsules, which can be a bit much to take all at once. Personally, I usually take just three.
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BACK-DOOR
Gold
Posted on Oct 19, 2025
United Arab Emirates
689
0
0
48
Verified purchase
Excellent Quality, Fast Delivery & Perfect Packaging! I’m extremely satisfied with this product from iHerb! The quality is absolutely amazing — you can really feel the difference compared to other brands. The packaging was neat, safe, and well-sealed, ensuring the product arrived in perfect condition. Shipping was super fast and reliable, even faster than I expected! Everything came fresh, authentic, and exactly as described on the website. I also appreciate how iHerb always delivers genuine products with great expiration dates and professional packaging. Highly recommend this item to anyone looking for top quality, great value, and trusted delivery service. I’ll definitely order again soon!
iHerb customer
Gold
Posted on Oct 10, 2025
United Arab Emirates
324
0
0
9
Verified purchase
Force Factor L-Arginine is a powerful supplement that supports healthy blood flow, energy, and workout performance. Each capsule delivers a potent dose to help improve circulation and endurance naturally. The capsules are easy to swallow and gentle on the stomach. Packaging is durable, clearly labeled, and convenient for daily use. Overall, a high-quality, effective, and reliable L-Arginine supplement for energy and heart health
iHerb customer
Silver
Posted on Sep 20, 2025
Saudi Arabia
158
0
0
14
Helpful
Verified purchase
The Force Factor L-Arginine 150 Capsules are impressive in terms of quality. The package is sturdy and easy to handle, keeping the capsules secure and fresh. The capsules are easy to use and swallow, and I appreciate that there’s no strong scent or aftertaste, which is great for sensitive users. The size of each capsule is manageable, making daily supplementation convenient. With consistent use, I’ve noticed improved energy levels and overall well-being. Overall, this is a reliable product that feels thoughtfully made for daily support.
Chet
Posted on Sep 4, 2025
Hong Kong
28
0
0
2
quality is top-notch
Verified purchase
L-Arginine 3000mg is a fantastic supplement! The quality is top-notch, and I can feel the difference during my workouts. The capsules are the perfect size, so they're easy to take daily. I also love that the ingredients are clean and simple, with no unnecessary fillers. Since I started taking this, I've noticed better endurance and recovery in my training.
iHerb customer
Posted on Sep 1, 2025
United States
58
5
0
7
Verified purchase
“Force Factor L-Arginine is an excellent supplement! The quality is top-notch, and the formula really supports better blood flow, energy, and workout performance. Since I started taking it, I’ve noticed improved endurance, stronger pumps during exercise, and faster recovery. The capsules are easy to swallow, and the packaging is professional. The price is fair considering the effectiveness. But what about age? It would be helpful to know if it’s suitable for all age groups, especially older adults. Overall, this is a reliable, effective, and highly recommended supplement for fitness and performance!”
iHerb customer
Posted on Aug 25, 2025
Israel
10
0
0
4
Force Factor,L-Arginine, 150 Capsules
Verified purchase
"I’ve been taking Force Factor L-Arginine for several weeks now, mainly to support my workouts and overall circulation, and I’m very satisfied with the results. I’ve noticed a real boost in endurance during training sessions, and my muscles feel less fatigued even after heavy workouts. There’s also a noticeable improvement in blood flow and pump, which makes a difference both in the gym and in daily energy levels. The capsules are easy to swallow, and I haven’t had any stomach discomfort or side effects, which I experienced with some other brands in the past. The bottle contains 150 capsules, which is a great value for the price and lasts a good amount of time if you’re consistent with your routine. The only small downside is that the serving size requires multiple capsules per day, so it’s not a simple “one and done,” but the effectiveness makes it worth it. Overall, Force Factor delivers a high-quality L-Arginine supplement that does exactly what it promises – great choice for anyone looking to enhance performance and support circulation."