Claire Nevinson, superintendent pharmacist at Boots, explained: "The launch of our Vitamin B12 Service helps provide customers with convenient access to nutritional support they may need, when they need it
Polycythemia vera An uncommon blood disorder where the red blood cell count increases too much
B12 is an important nutrient that is often used as a nutritional supplement, even by those without a B12 deficiency
Edinger JD, Wohlgemuth WK, Krystal AD, Rice JR
B12 may be tested alongside other metabolic markers if we suspect significant deficiency or insufficiency before designing your injection protocol
compiled from community dosing logs and reconstitution guides documentation of what sources describe, not a recommendation): Self-reported starting doses begin around 125 mcg weekly for 2-4 weeks to assess tolerance, before increasing to 250 mcg