Citrulline
What Citrulline is & what it does
Citrulline is an amino acid that occurs naturally in the body and in some plants such as watermelon. In cosmetic and sunscreen formulas it is used as a skin-conditioning and humectant agent that helps support skin hydration. It is a small, water-soluble molecule that is generally well tolerated in topical products.
Is Citrulline safe?
Citrulline is an amino acid found naturally in the body and in some plants, and it is generally regarded as safe for topical use at cosmetic levels. It is a small, water-soluble molecule that is usually well tolerated. Patch testing a new product remains a sensible precaution for reactive skin.
What does Citrulline do in skincare?
Citrulline works as a skin-conditioning and humectant ingredient that helps support skin hydration. Its small size and water solubility let it integrate easily into water-based formulas.
Is Citrulline vegan?
The citrulline used in cosmetics is commonly produced by fermentation or synthesis rather than from animal sources, which generally makes it suitable for vegan formulas. Sourcing can differ between suppliers, so checking the brand's labeling is the surest way to confirm.
Sunscreens with Citrulline
We rate 11 sunscreens that contain it, showing the top 10 by overall score:
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Sungboon Editor Green Tomato Pore Blurring Suncream
92/100
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Retipalm Sun Protection SPF 30
92/100
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RITUALS Oil-Free Daily Sun Protection
91/100
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Azio Beauty Age Defy Tinted SPF Perfector
87/100
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Jean D'Arcel Solaire SPF 30
85/100
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LANEIGE Watery Sun Cream Spf 50+ Pa++++
82/100
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JM Solution Baby Fresh Sun Cream 40 PA+++
78/100
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A'pieu Pure Block Daily Sun Cream EX
77/100
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Holika Holika Make Up Sun Cream
77/100
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Holika Holika Make Up Sun Cream Matte Tone Up | Physical Sunscreen
74/100