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While the NIH does not specify a tolerable upper intake level for vitamin B12, a study published in the JAMA Network Open found that high intakes of vitamin B12, such as from daily supplementation of 25 micrograms or higher, increased the risk of bone fracture [3] [4]
According to the brand's published documentation, the arginate salt offers greater stability in the gastrointestinal environment compared to acetate, and this was the deliberate formulation choice made to support consistency and potency in capsule delivery.* That rationale is stated by the brand and reflected on the product page
AOD9604, a peptide fragment, is studied in metabolic research
In contrast, magnesium chloride did not exhibit any significant sleep improvement, and magnesium L-aspartate could promote sleep only at a very high concentration of 729 mg
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