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Stress and poor diet can quietly chip away at your B12 stores over time
Gastrointestinal tolerability is another significant factor
Before-and-after images can provide a general idea of possible results, but they should not be directly compared, as each individuals skin and response are different
Because not everyone gets sufficient levels of B12 through their diet, vitamin B12 injections can ensure you do not have vitamin B12 deficiencies
Concentrations for hair serums are typically similar to those for skin, ranging from 1.5% to 3%
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