âTennis players often have problems with their knees, ankles, shoulders, hips, and wrists, so they really need to spend some time on those areas to get the tension out.â. This means that youâll be more likely to keep on truckinâ if you practice your poses off the court.
Normal value ranges for vitamin B12 vary slightly among different laboratories and can range anywhere between 200 to 900 pg/mL. The general consensus is values less than 200 pg/mL constitute a B12 deficiency.
A Stacy Wiegman, PharmD, Pharmacy, answered. The recommended dietary allowance (RDA) of vitamin B12 varies depending upon your age. For children, the RDA for vitamin B12 is 0.9 micrograms (mcg) for ages 1 to 3, 1.2 mcg for ages 4 to 8, and 1.8 mcg for ages 9 to 13.itamin B12 (cobalamin) is necessary in only very small quantities. The RDA is 2.0 micrograms. Vitamin B12 is found in significant quantities only in animal foods. The richest sources are liver and kidney, followed by fish, eggs, meat, and cheese.