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However, taking B12 as a shot is known to cause: PSA : Talk with a healthcare professional if you have any of these symptoms

Long-term injectable safety data are lacking

Genetics 214 (2), 381395

[Alternative Nutrition and Glutathione Levels] - Abstract - Europe PMC

B12 Vitamin Injections deliver a quick boost of energy, metabolism support, and cognitive clarity directly into the bloodstream for superior absorption and faster results

Low production cost and easy quality control The production process of tablets is relatively mature, and the production equipment is common, which makes the production cost of tablets relatively low