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Rare side effects include mild irritation at the injection site or allergic reactions
The benzyl alcohol preservative is engineered to inhibit microbial growth across that time window past 28 days, the cumulative microbial exposure from repeated punctures exceeds what the 0.9% benzyl alcohol concentration is documented to suppress
Factors that influence speed of results include: starting weight dosage adjustments consistency with treatment nutrition habits activity levels sleep quality metabolic health Gradual, steady weight loss is generally more sustainable than rapid short-term results
Summary: B12 deficiency can contribute to hair loss indirectly primarily by impairing red blood cell production and reducing oxygen delivery to hair follicles but it is rarely the sole cause
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