people with naturally dark skin tone.
those who lack exposure to sunlight, even all ages living an “indoor” lifestyle
people who wear skin-concealing garments or use sunscreen excessively
infants who are exclusively breast fed
women who have multiple pregnancies with short intervals
elderly, obese or institutionalized people
Injection solution for Vitamin B12 deficiency that cannot be corrected by dietary means as using the active form with No age limit, lactose-free, sugar-free, gluten-free