The Science

Leading the way scientifically...

With the introduction of SunVit-D3, D3 Vitamin LLP has set a new scientific standard for preparations sold as health supplements.

Unrivalled bioavailability

SunVit-D3 has unrivalled bioavailability in the oral supplement sector; the unique composition and quality of vitamin D preparations has, in recent studies, been shown to be essential for the bioavailability of the compounds.⁽²⁾

SunVit-D3 has been demonstrated to have an excellent bioavailability with no observed non-responders in 131 treated subjects.⁽¹⁾

Safe and efficient treatment

SunVit-D3 is currently the only 1000IU vitamin D supplement with substantial scientific evidence on both efficacy and safety.⁽³⁾

With the introduction of SunVit-D3, D3 Vitamin LLP can provide healthcare professionals with one of the most superior products available to prevent and treat vitamin D deficiency. Physicians can rest assured that with the use of SunVit-D3 their patients will increase their 25-Hydroxyvitamin D concentrations both efficiently and safely ⁽¹⁾.

Treating Deficiency

Vitamin D deficiency is very common, not only in the UK population but worldwide and it affects all age groups. ^{(1, 5-8)}. Consequently, the daily dosage of vitamin D3 needs to be at least 25 - 50 g (1000 -2000 IU) in order to increase 25-Hydroxyvitamin D levels to above 80 nmol/L ⁽⁴⁾.

During wintertime people living in the Northern hemisphere may require a daily supplement of vitamin D3 of 50 µg (2000 IU) which is equal to the approved upper tolerance level in the EU and in North America. This limit is, in the opinion of a leading expert, actually regarded as a minimum daily requirement in humans ⁽¹¹⁾.

What is a healthy level of Vitamin D3?

Nutritional adequacy for vitamin D is based upon the measurement of the metabolite 25-Hydroxyvitamin D. Leading experts recommend that 25-Hydroxyvitamin D concentrations should be at least 75-80 nmol/L (30-32 ng/mL) ^(3,12,13).

Dosage Guidelines

The new recommended levels of 25-hydroxyvitamin D can only be achieved with the administration of daily doses of vitamin D3 that are substantially higher than those found in common multivitamins and calcium supplements.

In light of trials and research, it is recommended that in order to maintain the correct levels of 25-Hydroxyvitamin D, one SunVit-D3 tablet of 1000IU is taken per day. Once the body has the correct levels of 25-Hydroxyvitamin D, it will flush out any that is not needed.

Fatty fish, vitamin supplements and calcium supplements containing vitamin D can all be taken along with SunVit-D3, without any risk of vitamin D overdose ⁽⁹⁾.
The safety of daily doses ranging from 25 to 200 µg (1000-8000 IU) has also been documented ⁽¹⁾.

If you wish to know more about the scientific support for the efficacy of SunVit-D3
visit our references page.