L-citrulline is a non-essential amino acid. Although the human body can synthesize it on its own, it is also widely found in fruits such as watermelon. L-citrulline is often used in the field of sports nutrition, but its mechanism of action focuses on improving cardiopulmonary endurance and vascular health. L-citrulline is not a component of protein and mainly functions in metabolism and signal regulation in the human body. L-citrulline can be efficiently converted into L-arginine in the body, which then acts through the nitric oxide pathway.

Core Applications

Food Industry

Special dietary products

Used in infant formula to support immune system development and gut health. In elderly nutrition powders, it helps improve vascular elasticity, assists in regulating blood pressure, and supports cardiovascular health needs in aging populations.

Flavor enhancement & preservation

Added to fruit juices and sparkling water to adjust sweetness, enrich fruity aroma layers, and mask the bitterness of artificial sweeteners. In prepared foods (such as frozen steaks and processed meatballs), it improves meat tenderness and extends refrigerated shelf life by 3–5 days.

Health foods

Applied in cardiovascular-support capsules, commonly combined with vitamin C (50 mg per capsule) to enhance absorption efficiency.

Sports Nutrition

Endurance & recovery supplements:
Used as a "nitric oxide booster" to promote vasodilation and improve oxygen delivery.

Fitness food fortification:
Added to protein bars and sports drinks for endurance activities such as marathons and triathlons, while also supporting muscle recovery.

Weight management products:
Due to its low-calorie profile, it is used in meal replacement shakes to increase satiety and promote fat metabolism, suitable for people undergoing fat-loss programs.

Feed Industry

Livestock & poultry feed

In weaning piglet feed, it helps relieve weaning stress–induced diarrhea and improve survival rates. In broiler finishing feed, it enhances feed conversion efficiency.

Aquaculture feed

Used in nursery feed for fish and shrimp to improve stress resistance (e.g., salinity changes, water quality fluctuations) and increase survival rates; suitable for high-value species such as salmon and grouper.

Pet food

Added to senior dog and cat food to support cardiovascular health, improve digestive absorption, and reduce the risk of constipation and hypertension in older pets.

Product Parameter

CAS No.	372-75-8
Purity	99.5%
Type	Nutrition Enhancers
Place of Origin	Shandong, China
Other Names	L-Citrulline
MF	C6H13N3O3
Grade Standard	Food Grade
Appearance	White crystalline powderr
Application	Food additive
Certificate	HALAL KOSHER ISO
Packing	25kgs fiber drum
MOQ	27 MT
Sample	Available
Shelf life	2 years
Packaging & Delivery	Selling Units: Single item