Health Queries about Mecofine OD 1500mcg Tablet 10s

Is this Vitamin B12 (Methylcobalamin) 1500mcg tablet safe for a diabetic patient whose B12 level is 147?

A B12 level of 147 is on the lower side, and it's actually quite common in people with diabetes, especially if you're on metformin, which can reduce B12 absorpt...