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Symptoms of Biotin Deficiency Hair loss or alopecia, depression, lethargy, hallucinations, numbness and tingling in the hands and feet, a scaly, red rash around the eyes, nose and mouth, seizures, weakened immune system, increased risk of bacterial and fungal infections

Also, while the manufacturers of metformin recommend against breastfeeding while taking the drug, data have shown that metformin is excreted into breast milk in small amounts and adverse effects on infant plasma glucose have not been reported in human studies

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Li KM, Rivory LP, Clarke SJ

How Often Should You Get Vitamin B12 Injections