{"product_id":"heart-of-steel-stim-free","title":"Heart of Steel Stim-Free Pre-Workout","description":"\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eThe Ultimate Stim-Free Pre-Workout—Full Doses, Full Pumps, Zero Caffeine.\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eHeart of Steel is a premium, stimulant-free pre-workout formula built for driven athletes who train on their own terms. Experience the full power of a professional-grade pre-workout in every scoop. Whether you are chasing skin-splitting muscle pumps, sustained training endurance, or razor-sharp focus, this 10-ingredient matrix delivers everything you need — without caffeine, without a crash, and without compromise.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eThe Formulation Factory Difference: \u003c\/strong\u003e\u0026gt; Most pre-workouts rely on heavy stimulants to make you feel something. Heart of Steel takes a different approach — a fully dosed, luxury-grade formula where every ingredient earns its place. No caffeine, no proprietary blends, no guesswork. Just clean, purposeful performance you can use any time of day.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-path-to-node=\"13\"\u003e\n\u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eMaximized Muscle Pumps: \u003c\/strong\u003eDrive nitric oxide production and blood flow with a full 8,000 mg dose of Citrulline Malate and 1,000 mg of Agmatine Sulfate — a combined pump matrix built for serious training.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eStimulant-Free Endurance: \u003c\/strong\u003eTrain harder and longer at any hour without caffeine or sleep disruption. 3,200 mg Beta-Alanine and 2,500 mg Betaine Anhydrous support muscular endurance through every set.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eSuperior Hydration Support: \u003c\/strong\u003e4,000 mg Glycerol Powder and 1,000 mg Taurine work together to support fluid balance and keep you feeling full and primed during your most demanding sessions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eDialed-In Focus Without Caffeine: \u003c\/strong\u003e1,500 mg of L-Tyrosine supports mental clarity and cognitive performance so you stay locked in from warm-up to cool-down — no jitters, no crash.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eAntioxidant-Rich Botanical Blend: \u003c\/strong\u003eBeet Root Powder and Pine Bark Extract provide naturally occurring antioxidants, while Black Pepper Extract ensures your body absorbs every ingredient efficiently.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"13\"\u003e\n\u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWhat's Inside the Matrix?\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWe believe in complete label transparency. Here is exactly what you get in every scoop:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eNitric Oxide \u0026amp; Pump Support\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eCitrulline Malate (8,000 mg): \u003c\/strong\u003eThe cornerstone of the formula. Supports nitric oxide production and blood flow to working muscles at a full clinical dose for maximum pump and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eAgmatine Sulfate (1,000 mg): \u003c\/strong\u003eWorks synergistically with Citrulline Malate to further amplify nitric oxide production and sustain muscle pump throughout your session.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eEndurance \u0026amp; Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eBeta-Alanine (3,200 mg): \u003c\/strong\u003eBuffers lactic acid buildup to support muscular endurance. A full clinical dose so you can push through every set of every workout.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eBetaine Anhydrous (2,500 mg): \u003c\/strong\u003eSupports power output and muscular endurance during high-volume training sessions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eHydration \u0026amp; Focus\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eGlycerol Powder (4,000 mg): \u003c\/strong\u003ePromotes cellular hydration and fluid retention during exercise, keeping you feeling full and primed from start to finish.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eL-Tyrosine (1,500 mg): \u003c\/strong\u003eAn amino acid that supports mental focus and cognitive performance during intense training — completely caffeine-free.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eTaurine (1,000 mg): \u003c\/strong\u003eSupports cellular hydration and electrolyte balance during demanding workouts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBotanical \u0026amp; Absorption Support\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eBeet Root Powder (500 mg): \u003c\/strong\u003eA natural source of nitrates and antioxidants to complement your active lifestyle and support endurance performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003ePine Bark Extract (200 mg): \u003c\/strong\u003eProvides naturally occurring antioxidants to support recovery and overall wellness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eBlack Pepper Extract (10 mg): \u003c\/strong\u003eContains piperine to enhance the bioavailability and absorption of every ingredient in the formula.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Formulation Factory","offers":[{"title":"1 Pack","offer_id":52004907483456,"sku":"HEART-OF-STEEL-PRE-01","price":59.99,"currency_code":"USD","in_stock":true},{"title":"2 Pack","offer_id":52004907516224,"sku":"HEART-OF-STEEL-PRE-01-MULTI-PACK-02","price":109.99,"currency_code":"USD","in_stock":false},{"title":"3 Pack","offer_id":52004907548992,"sku":"HEART-OF-STEEL-PRE-01-MULTI-PACK-3","price":144.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0824\/7643\/3728\/files\/HOS_Pre_Front_Transparent.webp?v=1778614708","url":"https:\/\/formulationfactory.com\/products\/heart-of-steel-stim-free","provider":"Formulation Factory","version":"1.0","type":"link"}