The #1 best vitamin d supplement to take, says dietitian
The effects of low vitamin D
levels can be wide-ranging. Fatigue, bone pain, muscle weakness or cramps, and
mood changes are just a few of the signs that you might have a vitamin D
deficiency. At the same time, surprising benefits of taking vitamin D
supplements, like immune system support and lower blood pressure, have been
well documented.
While exposure to the sun and a
healthy diet can help you produce vitamin D in your body, many of us would benefit
from supplements to help increase our levels. But with a wide range of
different vitamin D supplements available on the market, the options can seem
overwhelming.
Read on to learn what to know
about vitamin D supplements, specifically, calcifediol—the best form of vitamin
D you can take, and for more on how to eat healthy, make sure you avoid these
100 Unhealthiest Foods on the Planet.
1. Not all vitamin D is the same.
The two forms of vitamin D that
many people may be most familiar with are vitamin D2 (ergocalciferol), derived
from yeast or mushrooms, and vitamin D3 (cholecalciferol), derived from animal
sources like fish and egg yolks. There's another form, though, called
calcifediol.
Calcifediol is produced when D3
is metabolized by the liver and is the form of vitamin D that circulates in
your bloodstream. We often don't get enough of it through diet and from the
sun, and most vitamin D supplements on the market do not provide calcifediol
directly—they either contain vitamin D2 or vitamin D3, which must be processed
by the liver to create the vitamin D that then circulates in the blood.
2. The vitamin D supplement, calcifediol, is the best type of vitamin D supplement because it raises blood vitamin D levels fast.
Since a calcifediol supplement
does not need to be processed by the liver, it can be absorbed directly into
the bloodstream and throughout your body, which makes a calcifediol supplement
three times more effective in raising vitamin D levels when compared to vitamin
D3 on an equal microgram (mcg) basis. When taking a supplement with
calcifediol, you could reach your recommended levels of vitamin D in days
instead of months, when compared to vitamin D2 or vitamin D3 supplements.
What's more, several factors can
directly affect an individual's vitamin D status, including body weight.
Because vitamin D is a fat-soluble vitamin, it can get trapped in fat tissue.
Calcifediol is less likely to be affected by body fat because it is less
fat-soluble. Research has shown that individuals with higher body weight may
benefit from using calcifediol as a source of vitamin D.
3. You need a test to know your Vitamin D levels.
Aside from the different forms of
vitamin D, it can also be confusing to know how much you need.
The National Institutes of Health
offers recommendations on how much vitamin D you need each day based on your
age, but the daily upper limit for vitamin D for adults is 4,000 IU. If your
total intake of vitamin D is below this level, there is no difference in safety
between taking the different forms.
The only way to know what your
vitamin D levels are, is through a blood test. It is a good idea to have your
vitamin D levels tested regularly, especially if you're taking supplements to
understand if they are working and ensure that you're not getting too much.
This can be done either with a reliable at-home test kit or by requesting a
vitamin D test during your annual physical. Most laboratory tests report total
25-hydroxyvitamin D (calcifediol) as the reference measure of vitamin D status
in the body. This includes both vitamin D2 and vitamin D3 forms because they
both contribute to vitamin D status.
Summary
Vitamin D is an important
nutrient that is hard for many people to get enough of, either from the sun or
from their typical diet. Because of this, vitamin D supplements can be a good
option. Taking a vitamin D supplement regularly can help you achieve ideal
levels, especially in the fall and winter.
Disclaimer: Melissa Rifkin, MS,
RD, CDN is a New York dietitian who specializes in weight management and
bariatrics, and a spokesperson for health company Hologram Sciences.
