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1 2 3 "Contributions of microbes in vertebrate gastrointestinal tract to production and conservation of nutrients"

However, the initial cost comparison doesnt account for the efficiency and effectiveness of each method

(PubMed) Disclaimer The Linus Pauling Institute's Micronutrient Information Center provides scientific information on the health aspects of dietary factors and supplements, food, and beverages for the general public

Choline is primarily metabolized in the liver
