

💥 Unlock your heart’s full potential with Heart of Steel — the ultimate nitric oxide powerhouse!
Formulation Factory’s Heart of Steel is a premium nitric oxide supplement delivering 1000mg of L-Citrulline alongside a potent blend of CoQ10, Resveratrol, Ginkgo Biloba, and Capsaicin. Designed for sustained cardiovascular health, enhanced blood flow, and clean energy without jitters, this 120-capsule formula supports optimal blood pressure, mental focus, and recovery. Crafted in the USA by a family-owned brand, it offers a month’s supply of advanced heart and performance support trusted by active professionals.















| ASIN | B0DK61GRD2 |
| Age Range Description | Adult |
| Allergen Information | Non-GMO |
| Best Sellers Rank | #14,072 in Health & Household ( See Top 100 in Health & Household ) #37 in Sports Nutrition Nitric Oxide Boosters |
| Brand | Formulation Factory |
| Brand Name | Formulation Factory |
| Color | Black |
| Container Type | Bottle |
| Customer Reviews | 4.6 out of 5 stars 730 Reviews |
| Dosage Form | Capsule |
| Dose Release Method | Osmotic Release |
| Flavor | Unflavored |
| Item Form | Capsule |
| Manufacturer | Formulation Factory |
| Model Name | Heart of Steel Pack 1 |
| Number of Items | 1 |
| Primary Supplement Type | Blood Pressure Support, L Citrulline Natural Pre-Workout, L-Arginine, CoQ10, Resveratrol, Ginkgo Biloba, Quercetin, Nitric Oxide, Testosterone Support Primary Supplement Type Blood Pressure Support, L Citrulline Natural Pre-Workout, L-Arginine, CoQ10, Resveratrol, Ginkgo Biloba, Quercetin, Nitric Oxide, Testosterone Support See more |
| Product Benefits | Metabolic Maximizer |
| Specific Uses For Product | Masculinity Support |
| Supplement Formulation | Individual Supplement |
| Total Servings Per Container | 30 |
| UPC | 198715722352 |
| Unit Count | 120 Count |
C**Y
Great supplement for energy and endurance
I’ve been using Heart of Steel for a while now and I’m really happy with how it feels. The energy is smooth and steady without jitters or crashes, which is very important for me. It works well both for workouts and busy days. I like the ingredient profile — it feels well thought out and balanced. I didn’t experience any stomach discomfort or nervousness while taking it. The packaging was secure, the instructions are clear, and the product feels high quality overall. A solid option if you’re looking for a supplement to support energy and endurance. I would definitely purchase again.
O**A
⭐⭐⭐⭐⭐ Excellent supplement for energy and blood flow support
I’ve been using Heart of Steel for a few weeks now, and I can honestly say it’s a very solid supplement. What really stood out to me is the well-thought-out formula — it includes key ingredients like L-Citrulline, L-Arginine, CoQ10, Ginkgo Biloba, Panax Ginseng, Rhodiola, and Resveratrol. It’s great to have everything in one product instead of taking multiple separate supplements. The effects feel smooth and balanced, with no jitters, no crashes, and no unpleasant side effects. I’ve noticed improved daily energy levels and better endurance, especially during workouts and active days. It doesn’t feel like a harsh stimulant — just clean, steady support. Capsules are easy to swallow, and the quality feels premium. Overall, this is a well-rounded supplement for anyone looking to support circulation, energy, and overall performance. I would definitely repurchase and recommend it.
J**S
Love this supplement!
The formula is powerful and well-balanced, and I’ve noticed better energy and circulation during my workouts. Easy-to-swallow capsules with no weird aftertaste. Great quality ingredients and definitely worth it. Highly recommend!
D**I
Heart of steel
This product is amazing ! My mom had issues with blood pressure for a while now and this has completely regulated her blood pressure. You can tell that every capsule is made high quality. The ingredients work well together to help with energy, drive, and recovery. I finally don’t feel groggy waking up every day, or after my workouts. The crash has finally been cured! This product provides value for hard earned money and makes you feel the best you have in a while.
R**N
Better energy and less daily fatigue
Enhanced my energy levels, blood flow, and overall vitality. So far I noticed a steady increase in endurance during workouts and improved recovery times, allowing me to push harder and feel less fatigued afterward . Beyond physical benefits, I noticed improved mental clarity and focus, making daily tasks feel less overwhelming. The convenience of having a comprehensive supplement meant I didn’t need to juggle multiple products throughout the day. The capsules are easy to swallow with no unpleasant aftertaste, and the minimalist packaging adds a premium touch to my daily routine. Overall, Heart of Steel has seamlessly integrated into my wellness regimen, providing a natural and effective approach to energy management and cardiovascular support.
H**H
Energizing and Effective Pre-Workout
I’ve been using Heart of Steel for a few weeks, and it really boosts my energy and endurance without any jitters. The combination of L-Arginine, L-Citrulline, and other ingredients supports workouts and overall metabolic health. Highly recommend for anyone wanting a natural energy and performance boost!
S**Y
ABSOLUTE GAME CHANGER!
This product is a game changer! I’ve had issues with blood pressure for a while now and this has completely regulated my blood pressure. You can tell that every capsule is made high quality. The ingredients work well together to help with energy, drive, and recovery. I finally don’t feel groggy waking up every day, or after my workouts. The crash has finally been cured! This product provides value for hard earned money and makes you feel the best you have in a while.
S**Y
Impressive energy boost!
I’ve been really impressed with this supplement. It provides steady, clean energy without the jittery caffeine crash, which makes a big difference for longer workouts. The herbal blend noticeably helps with focus, and the improved blood flow support lets me train harder and longer. Overall, it feels well-formulated and effective without being overwhelming
Trustpilot
2 months ago
1 month ago