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will be helpful to have a costumer service number to have a person that i can talk instead email otherwise product is amazing I received the medication as promised

We can also advise on lifestyle changes, which may help those without an underlying deficiency

Side Effects of Vitamin B12 for Cats Fortunately, vitamin B12 is extremely safe
Conclusions We hypothesize that the high-folatelow vitamin B-12 interaction represents a novel cause of vitamin B-12 depletion caused by high folic-acid intake and consequent reduction in serum holoTC (Figure 11)

[1] Other rare side effects noted (mostly in older literature or high-dose use) include: polycythemia vera and peripheral vascular thrombosis in patients receiving repeated injections (though these associations are not well understood, they were listed in prior product literature as possible adverse events)
Boost Immune System : Vitamin B12 supports the production of white blood cells, which are essential for immune function