All mammals rely on intestinal bacteria to synthesize _________.

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Intestinal bacteria in mammals produce vitamin K, which is a crucial vitamin for blood clotting. While intestinal bacteria may aid in the absorption of certain nutrients like calcium, they do not synthesize it themselves. Similarly, bile is produced in the liver and stored in the gallbladder, and intestinal bacteria do not synthesize it. While some intestinal bacteria may aid in the breakdown of certain amino acids, they do not synthesize them. Vitamin D is synthesized by the skin in response to sunlight, and while intestinal bacteria may aid in its activation, they do not synthesize it.

All Mammals Rely on Intestinal Bacteria to Synthesize _________