Formulation Factory Heart of Steel: 10-in-1 Metabolic Maximizer Nitric Oxide Supplement, Blood Pressure Support, L Arginine, L Citrulline Natural Pre-Workout: Energy Management 120 Count
$41.99
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Welcome to Formulation Factory—where mediocrity ends and excellence begins.
As 2025’s boldest supplement brand, we craft stacked formulas for alpha men & women who refuse to settle. Unapologetic and scientifically perfected, our products fuel your body and mind to conquer any challenge.
Join a community of relentless achievers—men and women who redefine limits and demand transparency in every capsule. Greatness isn’t given; it’s forged.
How did we get our start?
After a near-death accident left our founder battling PTSD and depression, he created life-changing supplements on his countertop. Word-of-mouth success then sparked our birth.
What makes our products unique?
Cutting-edge tech + expertise = transformative, science-backed botanical supplements. Leveraging 2025’s innovation for life-changing results.
What problem are we solving?
Many brands hide behind misleading proprietary blends, but we prioritize transparency, crafting science-backed, family-trusted products built for US—because you deserve to know what you’re taking.
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Package Dimensions : 3.11 x 2.68 x 2.6 inches; 4.66 ounces
Item model number : HOS1
Date First Available : October 16, 2024
Manufacturer : Formulation Factory
ASIN : B0DK61GRD2
Best Sellers Rank: #8,988 in Health & Household (See Top 100 in Health & Household) #24 in Sports Nutrition Nitric Oxide Boosters
Customer Reviews: 4.6 4.6 out of 5 stars 654 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
THE TIN MAN PROBLEM – Strong outside, hollow inside. Energy collapsed. Drive vanished. Like the Tin Man, many men and women today feel the weight of stress and burnout.
THE TURNING POINT – The answer wasn’t more caffeine or quick fixes. It was restoring blood flow, nitric oxide, and cellular energy — the true spark of vitality.
10-IN-1 METABOLIC MAXIMIZER – L-Citrulline, L-Arginine, CoQ10, Resveratrol, Ginseng, Ginkgo Biloba, Rhodiola, Quercetin, Forskolin, Capsaicin. A powerhouse blend for circulation and stamina.
TRUSTED RESULTS – From the gym to daily life, thousands of men and women rely on HEART OF STEEL to push past fatigue and reclaim their edge. Third-party tested. Transparent label.
PURE QUALITY – Manufactured in an FDA-registered, GMP-certified USA facility. No proprietary blends. No fluff. Just premium ingredients in every capsule.
CONSISTENCY MATTERS – Supplements work gradually. For best results, take daily as directed. Most people begin to notice benefits with consistent use over 3–4 weeks.
YOUR SATISFACTION MATTERS – We back every bottle. Questions or concerns? Reach out through Amazon messages — our team is here to help.
8 reviews for Formulation Factory Heart of Steel: 10-in-1 Metabolic Maximizer Nitric Oxide Supplement, Blood Pressure Support, L Arginine, L Citrulline Natural Pre-Workout: Energy Management 120 Count
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$41.99
SamanthaRenee –
My new favorite supplement!
I’ve been taking the Formulation Factory Heart of Steel pills and I can honestly say they exceeded my expectations. I noticed a real difference in my energy, focus, and overall stamina within the first week. They don’t make me jittery or uncomfortable just a clean, steady boost that actually feels natural.The ingredients seem high-quality, the packaging is great, and the capsules are easy to take. I also love that I feel more motivated and balanced throughout the day they also do not leave a nasty taste in my mouth. I’ve tried plenty of supplements in the past, but this one truly stands out. And very effectiveHighly recommend! I’ll definitely be repurchasing it is worth your money.
Laiba.A –
Amazing Results & Noticeable Boost
I’m really impressed with Heart of Steel — it delivers exactly what it promises. The quality of the ingredients is noticeable right away, and the capsules are clean, easy to take, and gentle on the stomach.I’ve felt a big difference in my strength and daily energy. The blend of L-Citrulline, L-Arginine, Ginseng, Ginkgo Biloba, and other nutrient-rich ingredients works incredibly well together. It gives a steady boost without any crash.For the price, this is definitely great value for money. You get a strong, well-balanced formula that actually works.I also noticed an improvement in sleep quality — my body feels more relaxed at night, and I wake up feeling refreshed. Overall effectiveness is a solid 10/10.If you’re looking for a supplement that supports circulation, energy, recovery, and overall performance, this is one of the best I’ve tried. Highly recommended!
Alejandra Barrera –
Game changer!
Game changer! I was really impressed with Heart of Steel. The capsules are easy to take and I noticed a solid boost in energy and focus throughout the day without any crash. It also helped give me that extra motivation for workouts. Great quality overall, feels clean and effective. Definitely worth the money if you’re looking for a reliable supplement.
Sara –
Great all-around supplement for energy and endurance
Heart of Steel has been a game changer for my daily energy and workouts. I’ve noticed better stamina, focus, and an overall sense of balance throughout the day. It gives a clean, steady boost without jitters or crashes. The formula is well-rounded and clearly made with quality ingredients. Definitely worth adding to your routine if you’re looking to support metabolism and performance naturally.
Amazon Customer –
I recommend
I have been taking them for about 2 weeks now and i can right away feel a difference. These supplements have been very effective and helped me feel more awake and less anxious. These pills are very good quality, the texture is like a regular gel pill and very easy to swallow. The taste is not bad at all once you swallow it there’s no after taste. I definitely recommend. This is worth your money.
Katelyn –
A solid effort but some things to watch
I recently began using the Formulation Factory “Heart of Steel: 10-in-1 Metabolic Maximizer” (120-count) and wanted to share my thoughts after a few weeks of consistent use.What I liked:The ingredient transparency is commendable. The label clearly lists doses for key ingredients like L-Citrulline (1000 mg) and L-Arginine (400 mg) alongside others like CoQ10, Resveratrol, Ginseng etc.From a packaging/manufacturer perspective it feels premium: made in a GMP-certified, U.S. facility, no proprietary “mystery blend” terms.After about 3-4 weeks of taking the recommended dose (4 capsules daily, with food) I did notice a subtle increase in endurance and a slight uptick in my energy levels during workouts. While not dramatic, I felt a “cleaner” drive compared to some other pre-workout or general vitality supplements I’ve tried.What could be better / what to watch:The “boost” is subtle. If you’re expecting a shock-and-awe surge of energy or a massive nitric oxide “pump” effect, you may find this more moderate. It seems built more for consistent daily support rather than overnight transformations.Cost per serving: With 120 capsules (60 servings as indicated) and the price point being in the $50–$60 range, it’s not cheap. You’ll want to commit to at least a full month (ideally 3-4 weeks) to judge the effect properly.As with any supplement targeting circulation, nitric oxide, and metabolic support, you’ll want to check compatibility with any existing health conditions or medications (e.g., blood pressure medications) and consult your healthcare provider. The warning is clearly stated.Verdict:If you’re someone who values ingredient transparency and is looking for a well-formulated support supplement for circulation, stamina, and general vitality (rather than a hardcore “pre-workout blast”), Heart of Steel is a strong contender. For my part, I’d give it 3.5 to 4 out of 5 stars – it delivers what it promises, mostly, but doesn’t feel miraculous. If you try it, give it a full month of consistent use and pair it with good sleep, hydration, and nutrition to get the most out of it.
Shelby –
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.
Pamela McCune –
Best supplement
Since using this product I’ve noticed I’ve felt so much better. Working out at the gym has gone from lacking energy to being able to keep going and hit new PR’s. It’s a small capsule so it’s easy to consume or take it with you on the go. This product has multiple advantages/ benefits which include blood flow. Keeps me focused throughout the day without having a crash!