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.
Human requirements for vitamin B12 as set by the Daily Recommended Intake (DRI) are 2-3 micrograms/mcg per day to upwards of 4-7 micrograms/mcg per day. Naturally-occurring sources of Vitamin B12 are found primarily in foods of animal origin and among fortified foods of vegetarian/vegan origin.eep in mind that the majority of these B12 foods, despite their high levels of the nutrient, contain their own concerns. This is particularly true if the animal is raised in a conventional feedlot environment. Here are the highest non-vegan sources (and some plant sources) of vitamin B12: