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Vitamin D3
Vitamin D3
Vitamin D3, also known as cholecalciferol, is produced in the skin when it is exposed to sunlight, can be consumed in the diet, and is a hormone naturally produced in the body. Vitamin D3 is a fat-soluble vitamin that helps regulate calcium and phosphate levels in the body. It is important for bone and muscle strength and supports immune function.
You can buy Vitamin D3 prescribed by a medical practitioner, filled by an FDA-registered pharmacy.
For Use By
Delivery Method

Can I Buy Vitamin D3?

Patients can buy Vitamin D3 injections after getting approved for a prescription. A licensed practitioner will conduct an online Telewellness visit, and upon approval the pharmacy will send the medication directly to your door.

Do we offer Vitamin D3 as part of a treatment plan?
Boosts Immunity
Optimize Immune Function
Improve Mood
Fight Off Mood Disorders
Absorb Vitamins
Strengthen Muscles and Bones

How Does Vitamin D3 Work?

Keep Your Bones Strong

Vitamin D is available in foods, supplements, and sunlight. Once absorbed, vitamin D undergoes two hydroxylations, one in the liver and one in the kidney, to become active. Vitamin D is critical to maintaining bone density. When blood calcium levels fall, calcium will be pulled from the bone to compensate, decreasing bone density. Vitamin D binds to receptors on responsive genes and stimulates the production of proteins. The parathyroid hormone controls the production of active D3 (cholecalciferol).

Benefits of Vitamin D3

Increased vitamin D3 (cholecalciferol) has the following potential benefits:
  • Vitamin D3
    Strengthens muscle and bones
  • Vitamin D3
    Boosts immunity
  • Vitamin D3
    Improves mood
  • Vitamin D3
    Reduces inflammation

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Drug Details


What is Vitamin D3 used for?

Vitamin D deficiency is the only current medical indication for vitamin D supplements.


You should avoid Vitamin D3 if you are/have:

Contraindications to taking vitamin D3 supplements include:
  • Hypervitaminosis D
  • Hypercalcemia
  • Malabsorption
  • Heart disease
  • Kidney disease
  • Electrolyte abnormalities
Vitamin D3 Side Effects

What are the side effects of Vitamin D3?

Excess amounts of vitamin D are toxic. Potential side effects of excessive vitamin D3 (cholecalciferol) include:
Common Vitamin D3 Side Effects
  • Chest pain
  • Shortness of breath
  • Weakness
  • Metallic taste
  • Muscle or bone pain
  • Weight loss
  • Constipation
  • Nausea or vomiting
Rare Vitamin D3 Side Effects
  • None


  • Vitamin D3
  • Vitamin D3 History
  • 25-hydroxyvitamin D3 and 1,25-dihydroxyvitamin D3 exert distinct effects on human skeletal muscle function and gene expression
  • Vitamin D in Atopic Dermatitis, Asthma and Allergic Diseases
  • Vitamin D physiology
  • Vitamin D: The “sunshine” vitamin
  • Vitamin D Fact Sheet for Health Professionals

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