Arachidonic Acid in Human Milk

Area of Science:

• Nutritional Science
• Biochemistry
• Pediatrics

Background:

• Human milk is the optimal infant nutrition source, rich in unique lipids.
• Long-chain polyunsaturated fatty acids (LC-PUFAs), particularly arachidonic acid (ARA) and docosahexaenoic acid (DHA), are vital components of human milk.
• ARA is the most abundant LC-PUFA in human milk, crucial for infant physiological development.

Purpose of the Study:

• To review the role and importance of arachidonic acid (ARA) in human milk and infant nutrition.
• To highlight ARA's significance in early life development and its modulation by maternal diet and genetics.
• To provide recommendations for ARA and DHA supplementation in infant formulas.

Main Methods:

• Review of scientific and clinical studies on human milk composition and infant nutrition.
• Analysis of factors influencing ARA levels, including maternal diet and genetic variations.
• Examination of ARA's role in infant physiological development and related functions.

Main Results:

• Arachidonic acid (ARA) is a key nutrient in human milk, predominantly in triglyceride form.
• Maternal dietary intake significantly influences human milk ARA levels, showing regional variations.
• Emerging data suggest genetic variations in metabolic enzymes can affect ARA levels.

Conclusions:

• Arachidonic acid (ARA) is essential for infant and childhood development, requiring attention to nutritional status.
• Adequate ARA and DHA levels in human milk support infant nutritional and developmental needs.
• Infant formulas should be supplemented with ARA and DHA at levels found in human milk when breastfeeding is not an option.