Which one is right for you—VitaSpinach® or RS400®?

A quick guide to choosing the right product + timing it correctly.

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January 20, 2026 1:06pm EST

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Which One? How To Use?

Good day! Hope your week is going well. And if it isn’t… you already know the rule: just start again today. 😄

After our last email about the clinical study on our red spinach nitrates, we wanted to follow up with something we’re often asked: how to choose the right product—and how to use it.

First, it helps to understand the difference.

VitaSpinach® is designed for daily nitric oxide support. It delivers 240 mg of dietary nitrate, which makes it a great fit for people who want a simple, consistent routine that supports healthy circulation and nitric oxide availability day after day.

RS400® is designed for performance-level dosing.
It provides a professional-strength 400 mg dietary nitrate dose, matching the amount used in the double-blind, placebo-controlled trial conducted with resistance-trained athletes. In that study, researchers measured blood nitrate and nitrite levels (widely recognized markers of nitric oxide availability), along with movement efficiency and perceived effort during resistance training.

Now, here’s the easiest way to choose:

If your goal is daily support, consistency, and a product you can take year-round without needing to think too much about timing, VitaSpinach® is usually the right choice.

If your goal is training-day support, especially for strength workouts where you want to feel more efficient and reduce how hard the work feels, RS400® is usually the better fit.

And here’s the simplest way to use them:

VitaSpinach® (240 mg): take once per day, at whatever time is easiest to stay consistent. Many people mix it with juice in the morning, but the best time is the time you’ll actually stick with.

RS400® (400 mg): take 30–60 minutes before exercise, especially before resistance training.

The reason we built both options is simple: dose matters, consistency matters, and precision matters. When the nitrate dose is standardized, you can actually evaluate results clearly—both in clinical research and in real life.

We exclusively manufacture our own red spinach and make it available in two forms—VitaSpinach® and RS400®.

Learn more here.

See our clinical study here:

https://www.mdpi.com/2813-0413/4/4/60

Richard J. Perry

Chef & Founder, NutriGardens®

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