Medically reviewed by Debra Sullivan, Ph.D., MSN, R.N., CNE, COI — written by Megan Ware, RDN, L.D. ~ above November 7, 2019

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A human body produce vitamin D as a an answer to sun exposure. A human can also boost your vitamin D entry through details foods or supplements.

Vitamin D is crucial for number of reasons, including maintaining healthy and balanced bones and also teeth. The may also protect versus a selection of diseases and conditions, such as kind 1 diabetes.

Despite that name, vitamin D is no a vitamin, yet a prohormone, or precursor that a hormone.

Vitamins are nutrients the the human body cannot create, and so a person must consume lock in the diet. However, the human body can develop vitamin D.

In this article, we look at the benefits of vitamin D, what wake up to the human body when world do not gain enough, and also how to an increase vitamin D intake.


Share top top PinterestDuring sun exposure, a person’s human body produces vitamin D.
Vitamin D has actually multiple functions in the body. It assists in:

promoting healthy and balanced bones and teethsupporting immune, brain, and nervous device healthsupporting lung role and cardiovascular health

Read ~ above to discover out around these functions in an ext detail:

1. Healthy and balanced bones

Vitamin D theatre a far-ranging role in the regulation the calcium and also maintenance of phosphorus levels in the blood. These determinants are crucial for maintaining healthy bones.

People need vitamin D to allow the intestines come stimulate and absorb calcium and also reclaim calcium that the kidneys would otherwise excrete.

Vitamin D deficiency in kids can reason rickets, which leads to a severely bowlegged appearance due to the softening of the bones.

Similarly, in adults, vitamin D deficiency manifests as osteomalacia, or softening that the bones. Osteomalacia results in negative bone density and muscular weakness.

A vitamin D deficiency can additionally present together osteoporosis, for which end 53 million civilization in the United says either look for treatment or face an increased risk.

2. Lessened risk that flu

A 2018 evaluation of existing research argued that some studies had uncovered that vitamin D had a safety effect against the influenza virus.

However, the authors also looked at other studies whereby vitamin D walk not have this effect on flu and also flu risk.

Further research study is, therefore, necessary to check the protective result of vitamin D on the flu.

3. Healthy infants

Vitamin D deficiency has actually links come high blood push in children. One 2018 study found a feasible connection between low vitamin D levels and stiffness in the arterial wall surfaces of children.

The American Academy that Allergy Asthma and also Immunology (AAAAI) imply that proof points to a connection in between low vitamin D exposure and an enhanced risk of allergy sensitization.

An instance of this is kids who live closer come the equator and also have lower rates of admission to hospital for allergies plus under prescriptions of epinephrine autoinjectors. Castle are likewise less most likely to have a peanut allergy.

The AAAAI also highlight an Australian examine of egg intake. Eggs space a typical early resource of vitamin D. The kids who began eating eggs after 6 month were an ext likely to build food allergies than youngsters who started between 4–6 months of age.

Furthermore, vitamin D may improve the anti-inflammatory impacts of glucocorticoids. This benefit makes it potentially useful as a supportive therapy for civilization with steroid resistant asthma.

4. Healthy and balanced pregnancy

A 2019 review argues that pregnant women who space deficient in vitamin D may have actually a higher risk of occurring preeclampsia and giving birth preterm.

Doctors additionally associate bad vitamin D condition with gestational diabetes and also bacterial vaginosis in pregnant women.

It is likewise important to note that in a 2013 study, researchers associated high vitamin D levels throughout pregnancy with an enhanced risk of food allergy in the child during the first 2 year of life.

Although the body can develop vitamin D, a deficiency can take place for countless reasons.


Skin type: Darker skin, for example, and also sunscreen, reduce the body’s ability to absorb the ultraviolet radiation B (UVB) rays from the sun. Taking in sunlight is important for the skin to develop vitamin D.

Sunscreen: A sunscreen v a sun protection element (SPF) of 30 deserve to reduce the body’s capacity to synthesize the vitamin by 95% or more. Spanning the skin with clothes can inhibit vitamin D production also.

Geographical location: people who live in northern latitudes or locations of high pollution, work-related night shifts, or space homebound need to aim come consume vitamin D indigenous food resources whenever possible.

Breastfeeding: babies who exclusively breastfeed require a vitamin D supplement, specifically if they have actually dark skin or have actually minimal sunlight exposure. The American Academy of Pediatrics recommend that all breastfed babies receive 400 worldwide units (IU) per day of oral vitamin D.

Supplement drops because that babies are easily accessible online.

Although people can take it vitamin D supplements, that is best to obtain any vitamins or mineral through organic sources wherever possible.

Read much more on vitamin D deficiency.

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Symptoms that vitamin D deficiency might include:

regular sickness or infectionlow moodimpaired wound healingmuscle pain

If Vitamin D deficiency continues for long periods, that may an outcome in complications, together as:

cardiovascular conditionsautoimmune problemsneurological diseasesinfectionspregnancy complicationscertain cancers, especially breast, prostate, and colon.