We will do our best to answer this and many other similar questions in this article which should ease your mind regarding this subject.
Supplements 101: Vitamin D
It’s a family of nutrients that shares similarities in chemical structure. In your diet, the most commonly found members are vitamin D2 and D3.
Side Effects
by mouth as directed.
Vitamin D is best absorbed when taken after a meal but may be taken with or without food. Alfacalcidol is usually taken with food. Follow all directions on the product package.
Your dosage is based on your medical condition, amount of sun exposure, diet, age, and response to treatment. If you are using the liquid form of this medication, carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose.
Do not swallow whole wafers. Place each dose on the tongue, allow it to dissolve completely, and then swallow it with saliva or water. Certain medications (bile acid sequestrants such as cholestyramine/colestipol, mineral oil, orlistat) can decrease the absorption of vitamin D. Take your doses of these medications as far as possible from your doses of vitamin D (at least 2 hours apart, longer if possible).
It may be easiest to take vitamin D at bedtime if you are also taking these other medications. Take this medication regularly to get the most benefit from it. It may help to mark your calendar with a reminder.
What Is Ergocalciferol?
Vitamin D helps your body absorb calcium.
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Design: The ISI Web of Knowledge (January 1966 to July 2011) database was searched electronically for all relevant studies in adults that directly compared vitamin D3 with vitamin D2. The Cochrane Clinical Trials Registry, International Standard Randomized Controlled Trials Number register, and clinicaltrials.gov were also searched for any unpublished trials.
However, additional research is required to examine the metabolic pathways involved in oral and intramuscular administration of vitamin D and the effects across age, sex, and ethnicity, which this review was unable to verif.