This product is out of stock. We recommend these alternatives.

Oilesen Vitamin D3 400iu - 10ml

Out of stock
Olivia Appleton - Medical Content Writer
Olivia Appleton
James O'Loan - CEO & Superintendent Pharmacist
James O'Loan
CEO & Superintendent Pharmacist
How we ensure accuracy in our content

What is Oilesen Vitamin D3 400?

Oilesen Vitamin D3 400 is a food supplement which is intended to provide vitamin D3 for babies and young children. It is formed with a basis of extra virgin olive oil and contributes to the maintenance of normal bones and teeth, muscles, function of the immune system and the absorption/utilisation of calcium and phosphorus.


Why is Vitamin D3 important?

Vitamin D is important for good health, strong bones and muscles. Unlike other vitamins, we do not need to get Vitamin D from the food we eat, as our main source is made by our skin in response to sunlight. Although it is classified as a vitamin, D3 transforms into a hormone in the body and circulates in the bloodstream to help absorb calcium and phosphorous. If we do not get enough Vitamin D, we can feel tired and our muscles can feel weak or ache. Severe Vitamin D deficiency can cause osteomalacia, which makes our bones softer and causes severe bone pain and muscle weakness.

Vitamin D deficiency has also been linked to several health problems such as:

  • Osteoporosis
  • Cancer
  • Diabetes
  • Autoimmune conditions
  • Heart disease

Vitamin D deficiency in children

Children need Vitamin D for growth and development. Children who have a Vitamin D deficiency can develop rickets which can cause permanent deformities to the bone, weaken muscles and reduce growth.


Who is most at risk of Vitamin D deficiency?

Vitamin D deficiency is very common in the UK due to a lack of adequate sunlight, but some people are more at risk than others:

  • Babies and young children- especially children who spend little time playing outside
  • People over 65 years of age
  • Anyone who spends very little time outside during the summer
  • People who are housebound
  • People who are obese or significantly overweight
  • Pregnant and breastfeeding women


How does Oilesen D3 work?

This product is designed to be a convenient way to add more Vitamin D into your lifestyle. The dropper makes it easy to administer this product to children. It helps to contribute to the maintenance of normal bones and teeth, muscle function and the function of the immune system and the absorption of calcium. 1 drop of Oilesen D3 contains 10 μg of vitamin D3. 


How to take this product

This product is suitable to be taken from birth. It is recommended to take 1 drop per day to be taken with a meal, mixed in a drink or directly into the mouth with the dropper.


  • Do NOT exceed the recommended daily dose
  • Food supplements should not be used as a substitute for a balanced diet and healthy lifestyle


Protect from heat and moisture. Do not store above 25°C. Store out of the sight and reach of children.

When NOT to take this product

Do NOT take this product if you are allergic to any of the listed ingredients (see ingredients tab for full list). Seek advice from your GP or a Chemist 4 U pharmacist BEFORE taking this product if you are pregnant or breastfeeding.


Important Information

This product is a medicine; make sure to speak to your doctor or Chemist 4 U pharmacist before taking this product if you have an underlying medical problem or are taking any other medicine or complementary therapy. If your symptoms get worse or continue after taking this product, contact us or your doctor. For medical services in your area, please refer to

If you are pregnant, trying to become pregnant, or breastfeeding, speak to your doctor or our pharmacist before taking this product. If you suffer from any allergies, ask your doctor or our pharmacist if this medicine is right for you.

Store all medicines out of sight and reach of children.

Please read the included leaflet carefully before using this product.

Please contact your GP if appropriate regarding this product.


Helpful Advice on Medication Restrictions & Addiction

For further information on our medication restrictions policy, please click here.

If you are concerned about addiction to 'over the counter' medication, we urge you to visit the below links for professional help and advice:


Active Ingredients

  • Vitamin D
  • Vitamin D3


  • Extra virgin olive oil, cholecalciferol (vitamin D3). 1 drop contains 10 μg (400 IU*) of vitamin D3

Brand Information
Brand Name
Product Data
Days Supply

Can vitamins or supplements help you lose weight?

What are the best vitamin supplements for weight loss?   Trying to lose weight can be much more difficult than it sounds, so we’ll probably all agree that every little helps when it comes to shedding those extra pounds.   As there seem to be vitamin supplements for everything nowadays...

Read More

Can Taking Vitamin Supplements Help with Eczema?

Which vitamin supplements are good for eczema?   When you’re in the middle of a nasty eczema flare-up you’ll try anything to get rid of that itching and soreness — trust me, I’ve been there!   Naturally, this has left people wondering whether their nutrition has an effect on their...

Read More

Are Multivitamins Halal?

How to find halal multivitamins and supplements   Finding halal vitamins and supplements is easier than ever as more and more companies realise that there’s such a high demand for Muslim-friendly products.   However, avoiding haram ingredients can be tricky if you’re not sure what to look for, which is...

Read More

Which Vitamin Supplements Should I Take During My Pregnancy?

The Best Pregnancy and Prenatal Vitamins   Your pregnancy can be one of the most exciting times of your life, but it can also be one of the most worrying.   As a mum-to-be, making sure that your growing baby is getting all the vitamins and nutrients they need is...

Read More

Do Vitamin Supplements Work?

Are vitamin supplements worth it?   Let’s be honest with ourselves — who ever really thinks to themselves “Hm, I wonder if I’ve had enough vitamin E today?” Nobody? Me either.   We know that we’re meant to take in enough vitamins and minerals to keep our body happy and...

Read More

Everything you need to know about vitamin D

  Vitamin D is an important vitamin that plays a vital role in keeping our bodies healthy and functioning properly. As well as helping to keep our teeth and bones strong, studies have shown that a lack of vitamin D can cause us to become more susceptible to infection. When...

Read More

Ask a Pharmacist

Didn't find the answer you were looking for? Submit a private question to be answered by one of our qualified UK pharmacists.

* Name and email address are only captured so you can be emailed a response when your question is answered by a pharmacist. No personally identifiable information is stored or displayed at any time.

Shipping Times

MethodHandling TimeTransit TimeTimescaleApprox Cost
Standard Shipping (3-5 Working Days)n/an/an/a£0.00
Royal Mail Tracked 24n/an/an/a£4.95
Next Day Guaranteed (1 Working Day)n/an/an/a£6.95
Sons Tracked 24n/an/an/a£3.90
Sons Tracked 48n/an/an/a£2.90

Times are given in working days and are approximate. Costs may change based on order total, day of the week or location within the UK. Ability to hit timescales will depend on whether the products are ordered before a cut off time, as well as additional administration time incurred in reviewing your order.

Please review the estimates at the checkout.

Shipping Costs

Free UK Delivery on all orders over £30* - Delivery within 3-5 working days.

Standard UK Delivery - £2.95* - Delivery within 3-5 working days.

Express UK Delivery - £4.95** - Delivery within 1-2 working days.

Temperature Controlled Delivery - £8.85 - Delivery within 1-3 working days.

Please Note: These prices are shown as a guide only. All delivery times are approximate but have been obtained in good faith.

*Excluding refrigerated products and treatments which are subject to different postage charges.


Discreet Delivery

All our items are sent completely discreet for your peace of mind.

This means the packaging is plain, there is no mention of what product is inside your package and there is no mention of Chemist4U either.

We respect that many of our products are of a sensitive nature - this is why we take every step to keep your purchases private.

Returns Information

Customers can read our full returns policy by clicking here