BACK TO CALCULATORS. Dosage of Vitamin D Needed To Achieve 35 to 40 ng/ml (90-100 nmol/L)Historically, 400 IU (10 ug) of vitamin D was recommended for better health because it closely approximated the amount of vitamin D in a teaspoonful of cod liver oil. However, 800 to 1,000 IU is the dose that may have a better chance of giving a patient a normal vitamin D level. In some countries, vitamin D is listed in micrograms, and the relationship is as follows:
It is much easier to access the patient’s need after a vitamin D blood test. Few individuals would allow their clinician to simply guess an individual’s cholesterol level before placing him/her on some type of medication. Clinicians have access to an accurate lipid test that provides guidance. The same is true for vitamin D levels. Clinicians should not suggest high intakes of vitamin D (5,000 IU for example) before recommending the 25-OH vitamin D test. Health care professionals need to keep in mind that in general, 100 IU (2.5 mcg) of vitamin D per day can raise the vitamin D blood test only 1 ng/ml or just 2.5 nmol/L after 2 to 3 months. How much vitamin D is needed per day to obtain a normal vitamin D blood level? The following examples include:
If the vitamin D blood test was 30 ng/ml (75 nmol/L) and a 40 ng/ml (100 nmol/L) level was desired, 1,000 IU (25 mcg) of vitamin D per day over several months should be taken to achieve a normal blood level or 40 ng/ml (100 nmol/L). Upon reaching the goal, most individuals need to supplement with 800 to 1,000 IU per day to maintain this level. Only working closely with a clinician over time can provide the most accurate answer. However, issues of insurance and health care access suggest that 800 to 1,000 IU is ample for many individuals who are not able to have their blood tested. Dermatology Nursing. 2009;21(1) © 2009 Jannetti Publications, Inc. Cite this: Vitamin D: A Rapid Review - Medscape - Jan 01, 2009.
 Authors and DisclosuresMark A. Moyad, MD, MPH, is the Jenkins/Pokempner Director of Preventive and Alternative Medicine, University of Michigan Medical Center, Department of Urology, Ann Arbor, MI. Is 25 mcg of vitamin D too much?The current recommendations suggest consuming 400–800 IU (10–20 mcg) of vitamin D per day. However, people who need more vitamin D can safely consume 1,000–4,000 IU (25–100 mcg) daily. Consuming more than this is not advised, as it is not linked to any extra health benefits.
What does 25 mcg mean in vitamin D?1000 IU (25 mcg) per day increases vitamin D blood levels 10 ng/ml (25 nmol/L). 2000 IU (50 mcg) per day increases vitamin D blood levels 20 ng/ml (50 nmol/L).
How many IU is 25 mcg of D3?Vitamin D3 25 mcg (1,000 IU)
Is 25 mcg the same as 1000 units?At 25 mcg (1000 international units (IU)), this vitamin D supplement is a powerful supplement to the daily vitamin D intake.
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How much is 25 mcg of vitamin d
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