ColeKal-D3 Capsules

  • Vitamin D3 capsules for bone and immune support
  • Treats and prevents vitamin D deficiency
  • Available in  daily 400 IU and high strength 20,000 IU doses
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Fast & Free Delivery Options

Variety of delivery options including next day & free delivery.

100% UK-based Pharmacy

Pharmacy, clinic and prescribers based in Greater Manchester.

Free Online Consultations

Start your treatment with a quick and free online consultation.

How to Buy Online

Step 1: Online Consultation

Fill in a quick online consultation for our licensed pharmacists to review.

Step 2: Choose a Treatment

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About Colekal-D3 Capsules

Colekal-D3 Capsules contain colecalciferol (vitamin D3), an essential nutrient that helps regulate the amount of calcium and phosphate in the body. It is designed to prevent and treat vitamin D deficiency, support healthy bones and teeth, and assist in the management of bone conditions such as osteoporosis alongside other treatments.

Colekal-D3 Capsules are suitable for adults and adolescents aged 12 years and over and are available in two strengths/pack options:

  • Colekal-D3 Every Day 400 IU Capsules
  • Colekal-D3 High Strength 20,000 IU Capsules
Medication Name Colekal-D3 Capsules
Active Ingredient Colecalciferol (Vitamin D3) – 400 IU (10 micrograms) or 20,000 IU (500 micrograms) per capsule
Medication Form Capsules
Used to Treat Vitamin D deficiency, bone health, adjunct treatment for osteoporosis
Available Strengths 400 IU (Every Day) or 20,000 IU (High Strength)
Who Can Use It Adults and adolescents aged 12 years and over
Prescription Required? No – General Sales List (GSL)

What Is Colekal-D3 Used For?

Colekal-D3 Capsules are used to treat and prevent vitamin D deficiency, which can cause bone pain, muscle weakness, and long-term bone density loss. They work by stimulating the intestinal absorption of calcium and phosphate, ensuring the body maintains healthy bones, teeth, and muscle function.

Who Is Colekal-D3 Suitable For?

Colekal-D3 is suitable for adults and adolescents over 12 years old who need daily vitamin D maintenance or treatment for diagnosed vitamin D deficiency.

Do not use Colekal-D3 Capsules if you:

  • Are allergic to colecalciferol or any listed ingredients
  • Have hypercalcaemia (high calcium levels in the blood) or hypercalciuria (high calcium in the urine)
  • Have severe renal impairment or kidney stones (nephrolithiasis)
  • Have hypervitaminosis D (high levels of vitamin D in the blood)
  • Are under 12 years old

Speak to a healthcare professional before use if you:

  • Have impaired kidney function or a history of kidney stones
  • Have sarcoidosis or other granulomatous disorders
  • Have heart disease or narrowing of the arteries
  • Are taking cardiac glycosides (e.g., digoxin) or diuretics (water tablets)
  • Are taking other vitamin D or calcium supplements
  • Are pregnant or breastfeeding

How to Use Colekal-D3 Capsules

  1. Take the required dose with water, preferably alongside your main meal of the day to enhance absorption.
  2. Swallow the capsule whole—do not chew or crush.
  3. For 400 IU, take one capsule daily or as directed.
  4. For 20,000 IU, take strictly according to your dosing schedule (e.g., once weekly or monthly as prescribed).
  5. Do not exceed the recommended or prescribed daily/weekly dose.

Possible Side Effects of Colekal-D3 Capsules

Colekal-D3 is generally well-tolerated when taken as directed. Side effects are uncommon and usually associated with excessively high doses:

Uncommon (associated with high calcium levels):

  • Nausea, vomiting, or loss of appetite
  • Constipation or stomach discomfort
  • Feeling unusually thirsty or frequent urination
  • Muscle weakness or tiredness
  • Confusion or drowsiness

Rare:

  • Skin rashes, itching, or hives

Warnings and Precautions

  • Do not take more than the prescribed or recommended dose, as excessive vitamin D can lead to toxic calcium levels.
  • Regular blood tests may be required during long-term or high-dose therapy to monitor calcium levels.
  • Inform your doctor if you are taking medications for epilepsy, heart conditions, or water retention.

Storage Instructions

  • Store below 25°C in a cool, dry place.
  • Keep in the original packaging to protect from light and moisture.
  • Keep out of sight and reach of children.

Ingredients

Active ingredient: Colecalciferol (Vitamin D3).
Excipients: Medium-chain triglycerides, gelatin, glycerol, purified water (exact excipients may vary slightly by batch/strength).

Important Information

  • Suitable for adults and adolescents aged 12 and above.
  • Best taken with meals for maximum absorption.
  • High-strength doses (20,000 IU) should be taken strictly as instructed by a healthcare provider.

 

ColeKal-D3 Capsules Reviews

Our Experienced UK-based Pharmacy Team

Clinical Consultant
MUDr, MRCEM, EBCEM, FRCEM
GMC no. 7176414

Pharmacist
MPharm
GPhC no. 2065469

Pharmacist
MPharm
GPhC no. 2046514

Page content authored by Amjad Khan, last reviewed by Dr Hussain Ahmad on 9th September 2026.