Two daily formulas. One situational. Together they cover the full physical picture.

Physical responsiveness — how strongly and reliably your body responds to desire — depends on two distinct timescales. The daily circulatory baseline: the ongoing health of your nitric oxide production, blood vessel function, and vascular tone. And the situational moment: what happens in the specific instance when you want to feel absolutely ready.

The Flow & Performance Stack addresses both. The daily formulas build and maintain the circulatory foundation. BlackHorn provides the occasion-specific edge when you choose to use it.

The three formulas.

StoneBone™

Sexual Performance & Blood-Flow Complex

The daily foundation · Take morning, every day

The broad performance foundation. Drive, libido, blood flow support, and stress resilience — the daily formula that addresses the full performance picture. Includes L-Arginine (250mg) for nitric oxide support and a proprietary blend of 12 botanicals targeting libido, circulation, and masculine readiness. The platform everything else in the stack builds on.

FlowMax™

Nitric Oxide & Circulation Complex

The blood flow layer · Take morning, every day

The dedicated blood flow amplifier. Dual-form L-Arginine (800mg total: 400mg base + 400mg AKG) and dual-form L-Citrulline (400mg total: 200mg HCL + 200mg Malate) for broader absorption, sustained nitric oxide availability, and both the circulation and endurance dimensions of physical performance. Niacin (15mg) for additional vasodilation support. Beta Alanine (80mg) for lactic acid buffering and physical endurance. Full ingredient transparency — every dose disclosed.

BlackHorn™

Pre-Performance Surge Complex

The situational edge · Take as needed, 45–60 min before

The occasion-based formula. Not taken daily — taken when you want to feel absolutely certain going in. 1,000mg Epimedium Extract standardized to 100mg active Icariins — the botanical compound most researched for male arousal and blood flow support. No stimulants. No crash. Sharper physical readiness and presence in the moments that matter most.

The daily protocol

Morning — StoneBone™ + FlowMax™ (every day)

Take 2 tablets of StoneBone™ and 2 capsules of FlowMax™ together in the morning with a full glass of water. Both are daily formulas that build their effect cumulatively. Take consistently at the same time each morning for best results.

As needed — BlackHorn™ (situational, 45–60 minutes before)

Take 2 capsules of BlackHorn™ 45–60 minutes before intimacy on the specific occasions when you want the additional pre-performance edge. Not a daily formula — used intentionally before the moments that call for it. Do not take more than 2 capsules per occasion.

Why the blood flow and circulation mechanism is central to physical performance.

Physical responsiveness — erection quality, strength of response, endurance, and physical sensation — is primarily a vascular question. Nitric oxide is the key signaling molecule: produced in the endothelium of blood vessels, it triggers smooth muscle relaxation, vasodilation, and increased blood flow to the tissue that needs it. This is the same mechanism that pharmaceutical PDE5 inhibitors work on — through a completely different pathway and at very different potency levels.

The Flow & Performance Stack addresses the nitric oxide mechanism from two angles: the broad daily support of StoneBone™ and the dedicated, higher-dose protocol of FlowMax™. BlackHorn™ adds the Epimedium mechanism — a natural botanical PDE5 pathway — for situational occasions.

StoneBone™ — The Broad Daily Foundation

L-Arginine (250mg) as part of a comprehensive 12-ingredient formula covering libido (Longjack 400mg, Maca 250mg), blood flow (L-Arginine, Cayenne Pepper), and stress resilience (Ginseng-Eleuthero 125mg). The daily baseline that makes physical performance more consistent across all situations.

FlowMax™ — The Dedicated Nitric Oxide Protocol

Dual-form L-Arginine strategy: L-Arginine base (400mg) for immediate bioavailability plus L-Arginine AKG (400mg) for sustained delivery via the alpha-ketoglutarate carrier mechanism — bypassing some of the gut arginase breakdown that limits single-form L-Arginine. Total: 800mg L-Arginine per serving.

Dual-form L-Citrulline strategy: L-Citrulline HCL (200mg) converts to L-Arginine in the kidneys with higher efficiency than supplemental arginine alone. L-Citrulline Malate (200mg) adds the malic acid component for ATP production and lactic acid buffering — the endurance and recovery dimension. Total: 400mg L-Citrulline per serving.

Niacin (15mg, 94% DV) for peripheral vasodilation. Beta Alanine (80mg) for endurance. Calcium (36mg) for smooth muscle support. Every dose disclosed — no proprietary blend.

BlackHorn™ — The Epimedium Mechanism

Epimedium Extract (1,000mg standardized to 100mg active Icariins) — the primary ingredient. Icariins supports blood flow and male arousal through a natural botanical PDE5 pathway, signaling smooth muscle relaxation in blood vessels without synthetic compounds or dependency. Supporting ingredients include Maca Powder, L-Phenylalanine, Muira Puama, L-Arginine, Asian Ginseng, Longjack, and Saw Palmetto at complementary doses.

For full ingredient breakdowns of each formula, see the individual product pages: StoneBone™ · FlowMax™ · BlackHorn™

Flow & Performance Stack — protocol.

This stack runs on two tracks: a daily protocol for the two foundation formulas, and a situational protocol for BlackHorn™. The daily formulas build the circulatory baseline. BlackHorn™ provides the additional edge on the specific occasions you choose to use it.

Every morning — StoneBone™ + FlowMax™

2 tablets StoneBone™ + 2 capsules FlowMax™, taken together with a full glass of water. Morning works best — the nitric oxide precursor mechanism in FlowMax™ benefits from consistent daily use at the same time. With food is fine. Do not exceed stated doses.

Note on Beta Alanine: FlowMax™ contains Beta Alanine (80mg), which may cause a harmless tingling sensation (paresthesia) in the face or hands within 15–30 minutes of taking. This is not an allergic reaction and fades within 30–60 minutes. Taking with food reduces the intensity.

As needed — BlackHorn™ (45–60 minutes before)

2 capsules BlackHorn™, taken 45–60 minutes before intimacy on occasions when you want the additional pre-performance edge. Not a daily formula. Do not exceed 2 capsules per occasion. Can be taken on the same day as StoneBone™ and FlowMax™ without issue.

For best results across the full stack

• Take StoneBone™ and FlowMax™ consistently every day — the circulatory baseline builds cumulatively over 2–4 weeks
• Use BlackHorn™ intentionally — it’s designed for specific occasions, not daily use
• Stay well hydrated — nitric oxide production and vascular function depend on adequate hydration
• Avoid alcohol with BlackHorn™ — it counteracts the Epimedium mechanism

Medical disclaimer.

This stack is not intended for individuals under 18, or for pregnant or nursing individuals. If you are managing a cardiovascular condition, taking blood pressure medication, or taking erectile dysfunction medications, consult your healthcare provider before use. Do not combine BlackHorn™ with pharmaceutical PDE5 inhibitors without medical guidance.

Ships from the USA. Delivered discreetly.

All orders ship from our US warehouse. Packaging is plain — no brand name or product name on the outside. We ship worldwide.

USA & North America

• Standard delivery (3–5 business days) — $8.90
• Express delivery (1–2 business days) — $14.90, or free for subscriptions after first order and on orders over $150

Europe

• Standard delivery (10–15 business days) — $8.90
• Express delivery (5–9 business days) — $14.90, or free for subscriptions and orders over $200

Rest of World

• Standard delivery (10–15 business days) — $12.90
• Express delivery (5–9 business days) — $19.90, or free for subscriptions and orders over $200

30-day money-back guarantee.

If you don't feel a meaningful improvement within 30 days of your first order of any product in this stack, contact us for a full refund on that product. No complicated process. No hold times. Applies to first-time purchasers on initial orders only — limit one per product per household.