D-amino acids in foods

Area of Science:

• Biochemistry
• Food Science
• Nutritional Science

Background:

• Amino acids exist as L- and D-enantiomers; L-forms dominate protein synthesis.
• D-amino acids (D-AAs) possess distinct functions, from bacterial cell walls to neurotransmission.
• Modern analytical methods reveal significant D-AA content in everyday foods.

Purpose of the Study:

• To review the origins and derivation of D-AAs in food.
• To highlight advanced methods for D-AA identification and quantification.
• To summarize the current understanding of D-AA effects on human health and nutrition.

Main Methods:

• Literature review on D-AA origins (raw materials, processing, contamination).
• Focus on cutting-edge analytical techniques for D-AA detection.
• Synthesis of research on D-AA nutritional and health implications.

Main Results:

• D-AAs originate from starting materials, fermentation, racemization, and contamination.
• Advanced analytical techniques enable precise D-AA quantification in food matrices.
• D-AAs contribute to food flavor and possess antimicrobial/antiaging properties.
• D-AAs exert both beneficial and detrimental effects on human health.

Conclusions:

• D-AAs are prevalent in foods with diverse origins and functional roles.
• Accurate detection methods are crucial for understanding D-AA impact.
• Further research is needed to clarify D-AA nutritional value and health effects, presenting economic opportunities.