BioStacks
Pure Encapsulations

Nitric Oxide Ultra (Capsules)

2 Capsules · 30 servings

iHerbAmazon

Every active here is dosed below the amount studied to work. See how each one compares in the breakdown below.

Best for

Heart

Ingredients (2)

L-Citrulline

33%

Dose

1000 mg

Target

3000–6000 mg

Form

—

CranLoad Proprietary Blend

382 mg

Doses not disclosed by manufacturer

Other Ingredients (3)

Ascorbyl PalmitateAntioxidant

Fat-soluble form of vitamin C used as preservative

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

Purified WaterSolvent

Water meeting USP specifications used as solvent/vehicle in gummies and liquids

How to Take It

Take it anytime

Timing doesn't matter for this one — taking it consistently does.

With or without food

On the label

Recommendations: As a dietary supplement, take 2 capsules, 1-2 times daily, between meals.

General guidance based on the ingredients, not a substitute for the label or your doctor.

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L-Citrulline

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❤️ for Heart

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L-Citrulline 2000 mg

Best Naturals

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Doctor's Best

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Nutricost

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77
L-Citrulline Powder (Unflavored)

SuperNutrition

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

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