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For a significant impact on skin tone and clarity, a course of 8-10 injections is often recommended

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*Correspondence: Meng Shi [email protected] Zeng [email protected] Lv [email protected] These authors have contributed equally to this work and share first authorship This article was submitted to Nutrition and Microbes, a section of the journal Frontiers in Nutrition Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers

Results vary based on B12 levels, sleep, nutrition, stress, activity level, and overall health

Be Flexible: Life is unpredictable, and there might be challenging days when sticking to your supplement schedule

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