Invita D3®

Invita D3

Treatments from only£9.99 per month

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  • UK-licensed clinicians


Invita D3 ®

We get most of our vitamin D from the sun, but we don’t tend to get a great deal of it during the winter months. So what should we do when it isn’t shining so much? 

That’s where Invita D3 comes in.

Subscribe to EveAdam and get Invita D3 delivered the next working day.

Treatments from only £9.99 per month

The sunshine pill delivered as and when you need it

When the sun isn’t shining (which can be the way in the UK), it’s sometimes more difficult to get enough vitamin D in our systems. What’s more, the darker your skin, the harder this becomes. Vitamin D deficiency has actually been called an ignored epidemic by some health officials.[1]

But don’t worry. Invita D3 is a simple and highly effective way to prevent your vitamin D levels from dropping, or treating severely low levels that cause major health problems. With various dosages to choose from, you and your prescribing clinician can deal with any of these issues by taking a capsule, liquid or oral solution. 

Prescription dosages of Invita D3 are also readily available at EveAdam. You just need to answer some questions about your health and one of our registered clinicians can offer the most suitable treatments tailored for you. On top of this, our subscription service means you can get your medication or supplement every month or every three months. 

In other words, even if the sun is unreliable, we won’t be.

Invita D3: what’s it for?

Invita D3 is essentially vitamin D. And that’s it. But what it treats and prevents gets a touch more complicated. If you’re not getting enough sunlight, whether because it’s winter or you’re just not the outdoors type, then the lower doses of vitamin D act as a preventative measure against levels dropping too low. If you already have severely low levels of vitamin D, then it can be used as a treatment, although this will require higher doses.

Can I buy Invita D3 over the counter?

Why yes, of course you can. But also no. Let me explain.

Invita D3 is available in different strengths, and the most common is as a supplement, which is the lowest dosage. This can be bought from your local pharmacy or even supermarket. The stronger doses are classified as a treatment, and require a prescription.

Why do I need a prescription to buy vitamin D?

The stronger doses of Invita D3 should only be used for a short period of time. You’ll also need to be properly diagnosed with severely low vitamin D in order to use these stronger doses safely. In fact, having too much vitamin D in your system can cause serious health problems (see below). For this reason, its use will need to be monitored.

Page reviewed by:
Dr Daniel Atkinson
Dr Daniel Atkinson
GP Clinical Lead
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Last updated 05/07/2021


What is Invita D3?

Invita D3 is a group of vitamin D supplements and treatments that are available in capsule, oral solution and drop form. They can be taken continuously as a preventative measure against vitamin D levels dropping, particularly during the months of October and March in the UK. They are taken for a specific period of time as a treatment for severely low levels.

Vitamin D is one of the body’s essential vitamins and minerals. It helps keep muscles, teeth and bones healthy.

Invita D3 and colecalciferol: what’s the difference?

Invita D3 as a treatment

Invita D3 as a supplement

What are the dosages of Invita D3?

Where can I buy Invita D3 online?

How do I take Invita D3?

Invita D3 should be taken as instructed. This usually includes taking it with a meal in order to get the most out of the medications or supplement.

Invita capsules are simply swallowed with water in the dosage stated. For drops, you should shake the bottle before use. It can also be mixed with warm water if preferred. The oral solution has a slight olive oil taste. Each dose should be emptied into the mouth directly.

What are the instructions for each dosage?

Invita capsules, drops and oral solutions: which is better?

What should I do if I take too much?

What are the most common side effects for Invita D3?

It’s unlikely that you’ll experience side effects when taking vitamin D, particularly if it’s a daily maintenance dosage. In fact, the most common side effects, hypercalciuria (too much calcium in the urine) and hypercalcaemia (too much calcium in the blood), occur in less than one in 100 patients. Hypercalciuria symptoms include pain in the side, UTI (urinary tract infections) and irritability.

When to see a doctor

What to look for with allergic reactions

Taking Invita D3 with dietary restrictions

Different vitamin D products are made from different substances, while the active ingredient, the vitamin D itself, remains essentially the same. This means that some products may not be suitable for you if you have dietary restrictions. For example, some capsules contain animal products (gelatin), some of which may not be halal or kosher. Other products may contain gluten or dairy.

Invita D3 is thought to be halal and kosher but has yet to be certified. If you’re not sure, speak with your prescribing clinician or check the ingredients of the product, which can be found on the product packaging or information leaflet that comes with your treatment.

Invita D3 or sunshine?

Why take vitamin D3 and not D2?

Is food a reliable source of vitamin D?


Always read the patient information leaflet that can be found inside your medication’s packaging.

When to avoid taking Invita D3

Invita D3, as with all vitamin D products, is extremely safe for the vast majority of people that use it. The risks involved usually only occur when taken in far too high a dosage against the instructions of the prescriber.

It should be noted that there are some medical conditions and treatments with which it should not be mixed.

Health conditions can always cause issues when taking other medications and supplements, no matter how safe these products usually are. You should therefore tell your prescribing clinician about any health condition you have or are prone to. These include: sarcoidosis, kidney disease, kidney stones, allergies to any of its ingredients, hypercalciuria and hypercalcaemia.

Taking Invita D3 with other medications


[1] Naeem, Z. 2010. vitamin D Deficiency- An Ignored Epidemic. International Journal of Health Sciences. U.S.A. PMC. [Accessed May 15th 2021]

[2] Penckofer, S, Et al. 2010. vitamin D and Depression: Where is all the Sunshine? HHS Public Access. USA. PMC. [Accessed May 16th 2021].