Q: Can some vitamin and mineral dietary supplements be taken as soon as every week as a substitute of day by day?
A: Just a few can. The physique is ready to retailer some nutritional vitamins, particularly the “fat-soluble” ones like vitamin D, for weeks and even months. The identical is true of iron, zinc and a few B nutritional vitamins, together with folic acid. This has been studied largely in creating international locations, the place deficiencies are widespread and once-weekly administration is less complicated and cheaper.
On this nation, analysis exhibits that in individuals with very low blood ranges of vitamin D, excessive once-weekly (and even month-to-month) doses— corresponding to eight,000 to 50,000 IU of vitamin D every week for six to eight weeks—can increase blood ranges in addition to comparable day by day dosing. Doses on the excessive finish of that vary ought to be used solely underneath a physician’s supervision.
Equally, some research have discovered that individuals with anemia attributable to vitamin B12 deficiency can take very massive oral doses of the vitamin as soon as every week or as soon as a month, underneath medical supervision, as a substitute of B12 injections. And in accordance with a 2009 Cochrane Collaboration evaluation, once-weekly high-dose iron dietary supplements (both alone or with folic acid) could also be an choice for pregnant ladies.
Regardless of the standard “one-a-day” method to multivitamin/mineral drugs, taking a multi supplying 100 p.c of the Each day Values each few days “can be greater than enough” for most individuals, in accordance with Sharon Fleming, Ph.D., Professor of Dietary Science and Toxicology at UC Berkeley.
However take into accout, in case your food regimen is sweet and also you don’t have a identified deficiency, you most likely don’t have to take any complement, besides maybe calcium and vitamin D—plus folic acid in case you are a lady of child-bearing age, and almost definitely vitamin B12 should you’re a strict vegetarian.