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Definition of ALA

ALA: 1. Alpha-linolenic acid 2.Aminolevulinic acid, a naturally occurring chemical in the body that is converted to protoporphryn IX, a light-sensitive compound. Aminolevulinic acid has been used in the photodynamic therapy of skin precancer and cancer.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=38995
Last Editorial Review: 9/9/2004

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