Keep until the expiration date printed on the label
For references and more information , see the section on Deficiency in the Riboflavin article
The detection sensitivity reaches the nanogram level, making it suitable for quantifying trace active ingredients in capsules and related pharmacokinetic studies
Examples include insulin, growth hormone, and oxytocin
Deficiency In healthy adults, overt vitamin B 12 deficiency is uncommon, mainly because total body stores can exceed 2,500 g, daily turnover is slow, and dietary intake of only 2.4 g/day is sufficient to maintain adequate vitamin B 12 status (see The RDA) (4)
Monthly Maintenance Therapy When Vitamin B12 levels are stable, monthly shots start