S7 is a low-dose plant-based supplement blend designed to boost your body’s own production of nitric oxide, a molecule that relaxes blood vessels and increases blood flow. Developed by FutureCeuticals, it contains extracts from seven plant ingredients and is typically found as a branded component inside pre-workout formulas, pump products, and other sports nutrition supplements rather than sold on its own.
What makes S7 unusual in the nitric oxide supplement space is its approach. Instead of flooding your body with raw materials to make nitric oxide (the way L-arginine or L-citrulline supplements do), S7 works at a much smaller dose to signal your cells to ramp up their own nitric oxide output. The clinical dose studied in trials is just 50 mg, a fraction of the multi-gram servings required by other nitric oxide boosters.
The Seven Plant Ingredients
S7 is a proprietary blend of green coffee bean extract, green tea extract, turmeric extract, tart cherry, blueberry, broccoli, and kale. These ingredients are selected for their polyphenol and antioxidant content rather than for delivering nitrates directly. The idea is that the combination of plant compounds reduces oxidative stress in blood vessel walls, which in turn allows the body to produce and preserve more of its own nitric oxide. Each serving is tiny compared to typical supplement doses, since the active polyphenols are concentrated extracts working as cellular signals rather than bulk nutrients.
How S7 Differs From Other Nitric Oxide Supplements
Most nitric oxide supplements take a “supply the building blocks” approach. L-arginine provides the amino acid that your body converts directly into nitric oxide. L-citrulline gets converted into L-arginine first, then into nitric oxide. Both require relatively large doses to produce measurable effects: research suggests a minimum of 3 grams of L-citrulline per dose, and L-arginine studies typically use 6 to 7 grams or more.
S7 takes a different path. Rather than supplying precursor molecules, its plant polyphenols appear to reduce the reactive oxygen species (free radicals) that break down nitric oxide before it can do its job. When fewer free radicals are destroying nitric oxide in your bloodstream, more of what your body naturally produces stays active and available. This is why S7 works at 50 mg while citrulline needs thousands of milligrams. They’re solving the same problem from opposite directions.
It’s worth noting that the evidence base for L-citrulline is broader and more established. Multiple studies have shown that citrulline and citrulline malate can enhance strength, power, and muscular endurance during high-intensity resistance exercise. L-arginine, on the other hand, has not held up well as a performance supplement in research. One study even found that 7.4 grams of L-arginine negatively affected muscular endurance during bodyweight exercises.
What the Clinical Research Shows
The primary published study on S7 was a double-blind, placebo-controlled, randomized trial that enrolled 42 overweight or slightly obese adults. Participants were split into three groups: a placebo group, a 25 mg S7 group, and a 50 mg S7 group. Each person took one capsule every morning with food at roughly the same time each day.
Researchers measured two things: changes in bioavailable nitric oxide in the blood (tracked through a marker called circulating NOHb) and changes in cellular production of reactive oxygen species. The study’s marketing materials cite a 230% increase in nitric oxide levels, a figure that has become central to how S7 is promoted across the supplement industry. However, it’s important to keep context in mind. This was a single study with a small sample size conducted in a specific population (overweight adults, not athletes). The participants were not exercising as part of the protocol, so direct conclusions about workout performance require some extrapolation.
No large-scale replication studies in trained athletes have been published, which means the real-world performance benefits remain somewhat theoretical. The biological mechanism is plausible, since nitric oxide plays a well-established role in relaxing blood vessel walls and improving blood flow to working muscles, but the leap from “more nitric oxide in the blood” to “better workouts” hasn’t been directly confirmed for S7 specifically.
Typical Dosage and How It’s Used
The studied dose is 50 mg per day, taken with food. Most supplement companies that include S7 in their formulas use this 50 mg dose, though some use the lower 25 mg amount (which was also tested in the clinical trial). Because the dose is so small, S7 is almost always one ingredient among many in a pre-workout or pump formula rather than the sole active ingredient in a standalone product.
You’ll commonly see S7 paired with L-citrulline, beetroot extract, or other vasodilators in the same product. This combination approach makes theoretical sense: citrulline supplies more raw material for nitric oxide production while S7 helps protect whatever nitric oxide your body makes from being broken down. Whether this combination produces additive benefits hasn’t been studied directly, but it’s the logic most formulators are working from.
Practical Considerations
S7 is plant-derived and vegan-friendly, which gives it an advantage for people who want to avoid synthetic ingredients. The low dose also means it’s unlikely to cause digestive issues, a common complaint with the large citrulline or arginine servings found in many pre-workouts. No significant side effects were reported in the published trial.
The main limitation is transparency. S7 is a proprietary blend, meaning the exact amounts of each individual plant extract within that 50 mg are not disclosed. You know you’re getting some combination of green coffee bean, green tea, turmeric, tart cherry, blueberry, broccoli, and kale extracts, but not how much of each. For some consumers, this lack of specificity is a drawback, especially given the premium price that products featuring branded ingredients tend to carry.
If you’re evaluating a pre-workout or pump supplement that lists S7 on the label, look for the 50 mg dose to match what was used in research. Products using S7 at lower amounts may be including it more for label appeal than for a functional dose. And given the limited independent research, treat S7 as a reasonable but not yet proven addition to a nitric oxide stack rather than a replacement for better-studied ingredients like citrulline.