Please see below our frequently asked questions .
In the UK, sunlight doesn’t contain enough UVB radiation in winter (October to early March) for our skin to be able to make vitamin D.
During these months, we rely on getting our vitamin D from food sources (including fortified foods) and supplement.
It’s not known exactly how much time is needed in the sun to make enough vitamin D to meet the body’s requirements.
This is because there are a number of factors that can affect how vitamin D is made, such as your skin colour or how much skin you have exposed.
But you should be careful not to burn in the sun, so take care to cover up or protect your skin with sunscreen before your skin starts to turn red or burn.
People with dark skin, such as those of African, African-Caribbean or south Asian origin, will need to spend longer in the sun to produce the same amount of vitamin D as someone with lighter skin.
Vitamin D is the most common nutritional deficiency worldwide. Around one-quarter of the UK population is deficient in vitamin, rising to around one-third in the winter months.
Your Personalised Vitamins (YPV Vitamin D Home Test Kit®) is a test system for the quantitative determination of 25(OH)Vitamin D in finger prick blood samples. The test system is an in-vitro diagnostic device (IVD) intended for home use.
Experts agree that measuring serum 25-hydroxyvitamin D (25[OH]D) is the best indicator of vitamin D status. This is because it reflects cutaneous and dietary sources of vitamin D, has a fairly long half-life (2–3 weeks), and is not subject to tight homeostatic control. As a result, it gives an indication of vitamin D availability over recent weeks
[NICE, 2014; National Osteoporosis Society, 2013; BMJ, 2016; SACN, 2016]. Source: nice.org
Our unique programme offers you the ability to maintain your vitamin D at optimal levels throughout the year, by providing you with two home test kits a year and a complete year’s vitamin D supply that is tailored to your personal requirement based on your test results.
Our test kit is the world’s first medical device approved for home use that gives you a quantitative result of your vitamin D levels. It is easy to use, understand and enables you to take more control of your health.
Each time you log your results on your secure personal account at YPV, our unique programme determines your required vitamin dosage level for the following 6 month period. Our systems are designed to identify any unusual trends in your results. If such a trend is highlighted, one of our trained customer care team will contact you to discuss your options.
Your test results show your vitamin D levels and determines your supplement regime.
Gupta AK, Jamwal V, Sakul & Malhotra P (2014) Hypervitaminosis D and systemic manifestations: A comprehensive review. J.Int.Med.Sci.Acad. 27:236-237
Kimball SM, Mirhosseini N & Horlick MF (2017) Evaluation of vitamin D3 intakes up tp 15,000 international units/day and serum 25-hydroxyvitamin D concentrations up to 300 nmol/L on calcium metabolism in a community setting. Dermatoendocrinol. 9:e1300213
Bischoff-Ferrari HA (2014) Optimal serum 25-hydroxyvitamin D levels for multiple health outcomes. In Sunlight, Vitamin D and Skin Cancer (Advances in experimental medicine and biologhy), Reichrath J (ed) pp 500-25. New York: Springer-Verlag
The test is calibrated against laboratory methods of analysis, so can be relied upon to provide accurate results. Results are stored in the app, enabling you to monitor your results over time and enable us to calibrate your supplementation at the time of the test.
Vitamin D is important for your overall health in several ways. But excess of this vitamin can contribute to several side effects. Source