Independent supplement ratingsUS and Canada · Updated weekly
A ratings desk for a category that has spent thirty years grading its own homework.
A ratings desk for a category that has spent thirty years grading its own homework.
Powder · 300 g · 100 servings
~2,000mg citrulline (3,000mg malate) / 3,000–6,000mg studied
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The honest pick in a category built on hype. Forget the 'male enhancement' pills — the one ingredient here with real human evidence for blood flow is L-citrulline, and the cleanest way to take it is a plain, well-priced citrulline powder like this. Nutricost gives you a genuine dose of L-citrulline malate at a budget price, with no proprietary blend and no outcome promises it isn't allowed to make. It wins because it's the closest thing in this category to just the ingredient that's actually been studied.
Around 2,000 mg of L-citrulline per serving (from 3,000 mg of citrulline malate, 2:1), clearly labelled, no blend. The studied range for a blood-flow effect is higher — roughly 3,000–6,000 mg of citrulline — so you may want a rounded-up serving to match the research. Even then it's a real dose of the real ingredient at a fraction of what the branded pills charge.
Anyone drawn to this category who wants the evidence-based ingredient without the marketing. It's a supplement, not a treatment — if you have a medical concern, that's a conversation for a clinician, not a pill. For everyone else, this is the transparent, low-cost way to take citrulline.
Reviewed and fact-checked by the NFS editorial team · Last updated 08 Aug 2026