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Vitamin D3 (1000 IU)



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We've curated every product in our I DO | Nutrition shop based on their nutrigenomic properties and leading manufacturing standards. Nutrigenomics is the study of food and nutrients as one of the most important environmental modifiers of gene expression. A personalised protocol based on your unique DNA, biochemistry and symptoms can help you create optimal wellness and prevent many chronic lifestyle-related diseases. This is called 'personalised scientific wellness'.

60 capsules

Vitamin D3 helps in the development and maintenance of bones and teeth, but it also contributes to immune system function. Research shows that the D3 form (cholecalciferol) is significantly more potent and effective than the D2 form (ergocalciferol). Although sunlight exposure results in some vitamin D production, not enough vitamin D is produced, especially with most individuals staying out of the sun or applying sun-block which dramatically reduces production.

Pair with these tests

To find out about your unique vitamin D DNA and biochemistry, order one of these test on online:

Pharmacological Action

Vitamin D3 (cholecalciferol) is a fat-soluble vitamin synthesised in the skin via 7-dehydrocholesterol, a cholesterol precursor. Vitamin D3 then requires hydroxylation to form the active metabolite, calcitriol. Latest research shows that cholecalciferol is significantly more potent and effective in humans than Vitamin D2 (ergocalciferol). Although sunlight exposure results in some vitamin D production, recent research shows that not enough vitamin D is produced this way, especially with most people now staying out of the sun or applying sunblock which dramatically reduces vitamin D production. The major biological function of Vitamin D is to maintain normal blood levels of calcium and phosphorus. Vitamin D helps in the absorption of calcium and reducing urinary loss of calcium, thereby maintaining bones and teeth. Vitamin D also plays a role in immune function.

Product Composition

Each tablet contains the following active ingredient:

Vitamin D3 1000 IU

Inactive ingredients: Microcrystalline cellulose, sodium starch glycolate, magnesium stearate and silicon dioxide.

Suitable for vegetarians.

Dosage Directions

Adults and children over 6 years of age:
Take 1 tablet daily after food.

Product Warnings

Do not use this product if you are hypersensitive (allergic) to any of the ingredients. If you are on any medication or suffering from any medical condition, it is advisable to seek medical advice before starting any new medicine, supplement or remedy. Do not exceed recommended dosages unless on the advice of a healthcare practitioner. Do not use continually for more than 3 months without consulting your healthcare practitioner. This medicine has not been evaluated by the Medicines Control Council. This medicine is not intended to diagnose, treat, cure or prevent any disease. Health supplements are intended only to complement health or supplement the diet.

Side Effects

Side effects may include gastrointestinal upset.


There are no known contraindications.


There are no known interactions.

Pregnancy and Breastfeeding

If you are pregnant or breastfeeding, please consult your doctor, pharmacist or other healthcare professional for advice before taking this medicine.

Storage Instructions

Store in a cool dry place below 25°C. Keep out of reach of children.


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