b12 injections and heavy periods Iron deficiency deficiency both cause anemia. But the treatment is COMPLETELY different. Taking iron for B12 deficiency? Won't work. Taking B12 for iron deficiency? Won't work. Swipe to learn the Size:1000 mcg/ml - 10 ml (Pack of 4) Veterinary Multivitamin Vitamin B12 Professional-Grade Pet B12 Supplement
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