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This makes it too large to enter the skin, so it can only effectively hydrate the upper layers

Theres no recommended upper limit for B12, so overdosing is not a concern

[8] With advancing age, there is a decline in proteasome activity in cardiac tissue, which represents a significant mechanism contributing to the increased susceptibility of older organisms to cardiovascular diseases

Once you understand that, most of the marketing becomes flawed

Second, its essential to understand that there can be significant quality differences between B12 suppliers, impacting the effectiveness of the B12, its duration in your system, and even its safety
