How much B12 should you be taking weekly?

The recommended dietary allowance (RDA) for vitamin B12 varies by age, but for most adults, it is about 2.4 micrograms per day, which translates to around 16.8 micrograms per week. However, individual needs may differ based on factors such as age, diet, and health conditions. Those with deficiencies or certain medical conditions may require higher doses, so it's best to consult a healthcare professional for personalized advice.