Geographic data from iNaturalist shows that it has been sighted in the eastern United States, Mexico, Caribbean, Brazil, Spain, India, South Africa along with much of Central and South America and some Southern and East African countries
Burke AC, Telford DE, Huff MW
Support for Cardiovascular Health Some studies suggest that B12 may contribute to cardiovascular health by helping regulate homocysteine levels, an amino acid linked to heart disease Who Needs B12 Injections in Scottsdale
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For a detailed comparison, see bacteriostatic water vs sterile water
Absorption is limited to approximately 1.5 g per dose through the intrinsic factor pathway, though passive diffusion allows absorption of about 1% of higher doses