Vitamin D-3

Product ID: 90005
  • Helps Maintain Strong Bones
  • Supports Immune System
  • High-Potency Source, Highly Absorbable
  • 2,000 IUs (50 mcg) per serving
  • 120 softgels
  • Bottle contains 60-120-day supply
in stock

In stock (can be backordered)


Health Benefits

VitaMedica’s Vitamin D-3 is a high-potency source of the “sunshine vitamin”.  Vitamin D is necessary for building and maintaining healthy bones and teeth, facilitating normal immune system function and supporting neuromuscular function.

Vitamin D is a fat-soluble vitamin that is well-known for promoting calcium absorption thereby playing a role in bone and joint health.  Deficiency in vitamin D is associated with increased autoimmunity and an increased susceptibility to infection. Lower intakes of vitamin D is associated with higher rates of colon and breast cancer.

Vitamin D is one of the few vitamins that most people are deficient in.  Older adults, those with darker skin tones, and limited sun exposure are likely to fall short of the daily requirement for this vitamin.  Supplementing with this vitamin ensures that your body receives an adequate supply.

Vitamin D is part of our Immune Support product line. These supplements are designed to support healthy immune system function. To learn more, visit the Immune Support Products page.

Nutrition & Ingredients

How To Use

Directions: As a dietary supplement, take one to two softgels a day with food. Each individual is unique and nutritional requirements may vary. Store in a cool, dry place.

Storage: Store in a cool, dark place.

Caution: Do not take if safety seal on bottle is broken. KEEP OUT OF REACH OF CHILDREN.  For adults only. If you are diabetic, pregnant or breastfeeding, seek advice of your physician before using this product.

Not manufactured with wheat, milk, soy, egg, fish, shellfish, peanuts or tree nut ingredients. Produced in a GMP-certified facility that processes other ingredients containing these allergens.


1. How much vitamin D should I get daily?

As part of the new dietary supplement labeling laws that went into effect in 2018, the recommended daily intake for many vitamins and minerals changed.  In the case of vitamin D, the Reference Daily Intake (RDI) doubled from 400 IUs (10 mcg) to 800 IUs (20 mcg).

2. Do I really need to take a vitamin D supplement?

Individuals most likely to be deficient in vitamin D are those not regularly exposed to sunlight due to where they live (more Northerly latitudes receive less sunlight during the winter months).  The elderly (indoors more frequently; less able to synthesize the more active form of vitamin D), children (due more indoor games and increased sun screen use) and the obese (greater amounts of body fat alter the release of vitamin D into the bloodstream) are also at risk.

National health statistics taken in 2001-2004 indicates that the majority of children and adults, and almost all African Americans and Mexican Americans, are deficient in this vitamin.  This is most likely due to changes in body mass, lower milk consumption and increased sunscreen use.

3. What role does vitamin D play in health?

Vitamin D is necessary for building and maintaining healthy bones. People who get enough vitamin D and calcium in their diets slow bone mineral loss and help prevent osteoporosis and reduce bone fractures.  Vitamin D facilitates normal immune system function and improved resistance against certain diseases.  Deficiency in vitamin D is associated with increased autoimmunity and an increased susceptibility to infection.

A growing body of research suggests that vitamin D may play some role in the prevention and treatment of autoimmune diseases including Type 1 diabetes, multiple sclerosis and rheumatoid arthritis; hypertension, glucose tolerance, and other medical conditions.

Vitamin D may play an important role in regulating mood and fending off depression.

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4. Can I get my body’s requirements for vitamin D from the sun?

Your body manufactures vitamin D through exposure to sunlight.  However, season, time of day, length of day, cloud cover, smog, skin melanin content and sunscreen are among a number of factors that affect UV exposure and vitamin D synthesis.

5. Should I take extra vitamin D if my multi already contains this vitamin?

Perhaps.  Most multis formulated with vitamin D contain anywhere from 100-400 IUs of the vitamin.  The daily upper limit for vitamin D is 4,000 IUs in adults.  Given the importance of this vitamin to bone health and the immune system, making sure you obtain an adequate amount through diet and supplementation is important.  Health professionals often recommend upwards of 6,000-8,000 IUs of vitamin D daily in older adults, an amount that studies have indicated is safe.

6. What is the difference between Vitamin D2 and Vitamin D3?

Vitamin D is available in a number of forms but the two most common include D2 (plant based ergocalciferol) and D3 (animal-based cholecalciferol).  D2 which is derived from by irradiating yeast with UV light is generally used in fortified foods.  Most nutritional supplements use D3 as this form is considered to be three times more effective than D2.

7. Why is vitamin D measured in both International Units (IUs) and Micrograms (mcgs)?

New dietary supplement labeling laws which started going into effect in 2018, require that several fat-soluble vitamins be declared using different units of measure.  In the case of vitamin D, International Units (IUs) have been replaced by metric units or micrograms.  However, IUs may continue to be used in addition to mcg.

8. Can vitamin D help prevent getting a cold or respiratory infection?

Possibly.  Adults who have low vitamin D levels are more likely to report having had a recent cough, cold or upper respiratory tract infection.  A 2017 study that analyzed data on over 11,000 patients around the world found that vitamin D could help reduce the risk of an upper respiratory infection by up to 12 percent.  People who were deficient in vitamin D benefited even more.  Their chances of getting sick were cut in half – an important finding because many of us don’t get enough vitamin D to begin with, and especially during the cold winter months when outdoor time and sun exposure, which helps the body produce vitamin D naturally, is reduced.  The researchers note that this vitamin plays an important role in immune function, activating T cells that kill pathogens like bacteria and viruses.  See more here at Prevent Colds & Flu with this Vitamin.

9. Is a deficiency in vitamin D linked to developing dementia & Alzheimer’s?

Yes.  A 2014 study – the largest of its kind – found that those who were vitamin D deficient were more likely to develop dementia and Alzheimer’s disease. Participants were 1.658 men and women, aged 65 or older and in good mental health, who volunteered for the U.S. Cardiovascular Health Study between 1992-1993 and 1999. At the start of the study, blood samples were taken from each participant. Then, six years later, their mental condition was assessed.

Over the course of those six years, about 10% of participants had developed dementia.  After controlling for other factors, results showed a strong association between low vitamin D levels and elevated risk of dementia. Among participants who were moderately deficient in vitamin D, the risk of general dementia was increased by 53%.   Moderate vitamin D deficiency also led to a 69% greater likelihood of developing Alzheimer’s.  See more here at: Vitamin D Deficiency Linked to Dementia & Alzheimer’s.

10. What foods naturally contain vitamin D?

Vitamin D is not naturally present in many foods.  It is concentrated in fish liver oils and in the flesh of cold-water fatty fish such salmon, mackerel, herring and sardines.  The majority of vitamin D intake comes from fortified foods such as orange juice, milk, cereal, yogurt and margarine.  Lower levels of vitamin D can also be found in liver, egg yolks, butter and dark green leafy vegetables.

Mushrooms also provide some vitamin D.  A brand called Monterey Mushrooms provides 400 IUs of vitamin D in a 3-ounce serving of their white, brown and portabella mushrooms.  In a collaborative effort with the USDA’s Agricultural Research Service, Monterey Mushrooms discovered that mushrooms have a natural level of vitamin D and when exposed to ultraviolet light they synthesize vitamin D that is stable, maintaining its nutritional value even after cooking or freezing.

11. Are there any medications that interact with vitamin D?

Yes.  Corticosteroid medications such as prednisone, often prescribed to reduce inflammation, can reduce calcium absorption and impair vitamin D metabolism.  The weight-loss drug orlistat (brand names Xenical and alli) and the cholesterol-lowering drug cholestyramine (brand names Questran, LoCholest, and Prevalite) can reduce the absorption of vitamin D and other fat-soluble vitamins.

Have additional questions?

Our US-based wellness advisors are here for you Monday–Friday, between 8 am and 5 pm PST.

Call 888.367.8605 or email [email protected]


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