Taking L-citrulline pills or getting it from watermelon might help lower your blood pressure a little—especially if you already have high blood pressure and take it for at least six weeks.

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Evidence from Studies

Supporting (1)

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Community contributions welcome

2

The Effects of Oral l-Arginine and l-Citrulline Supplementation on Blood Pressure

Narrative Review

2019 Jul 22

This study looked at whether taking L-citrulline pills can lower blood pressure, and it found that yes, it does — and the amount it lowers it by matches exactly what the claim says.

Contradicting (0)

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No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

The Effects of Oral l-Arginine and l-Citrulline Supplementation on Blood Pressure

Score: 2

DOI: 10.3390/nu11071679

Similar Assertions

Taking L-citrulline supplements every day for a few weeks might slightly lower your blood pressure—like a small drop that could help keep your heart healthier.

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87%

Taking at least 6 grams of L-citrulline every day might lower your bottom blood pressure number by about 3 points, but taking less than that doesn’t seem to do anything noticeable.

59

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86%

Taking L-citrulline pills for 10 days at a specific dose doesn’t seem to make healthy young adults feel sick—only a few people might get a little stomach upset.

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70%