i have b12 injections but still tired

[14] In documented biotin deficiencies, improvements in symptoms like skin rash or hair loss can be observed within a few weeks of consistent therapy (exact timing can vary depending on the severity of deficiency and individual factors) https://cpimg.tistatic.com/13030671/b/4/50mg-5-Amino-1mq-Research-Chemical..png Where to Safely Inject B12: A Comprehensive Guide 000mcg Style:Package of Three

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