Denmark Research suggests they may support nerve repair, enhance cognitive function, and protect against neurodegenerative conditions, though more studies are needed to confirm their efficacy and safety for these purposes
The American journal of clinical nutrition 2023
Certain medications such as Metformin, H2-receptor antagonists including Zantac (Ranitidine), Tagamet(Cimetedine), Famotidine, Pepcid AC (Oral Pepcid), Axid AR (Nizatidine), Proton pump inhibitors (PPIs)including Prilosec (Omeprazole), Nexium (Esomeprazole), Prevacid (Lanzoprazole) and Antacids e.g:Gaviscon can also affect your ability to absorb vitamin B12
I had glandular fever in my late teens and had these horrible injections at that time in the rear
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