22,23 In patients with a normal or low-normal serum vitamin B 12 level, complete blood count results demonstrating macrocytosis, or suspected clinical manifestations, a serum methylmalonic acid level is an appropriate next step 1,2,6,18 and is a more direct measure of vitamin B 12 's physiologic activity
A massive 2024/2025 observational study published in PNAS (MedRxiv preprint) analyzed data from over 3,925 patients suffering from Long COVID and ME/CFS
On the other hand, you may notice more side effects after the second vaccine dose if youve never had COVID-19
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Slide down until your thighs are as close to parallel with the floor as pain allows
These meds can lower your bodys B12 levels by affecting absorption, so you might need to take a B12 supplement to keep those red blood cells in tip-top shape