level recommended by the department of health, for the maintenance of normal bones, teeth, muscle function, & immunity, easy-to-swallow, convenient, one-a-day formula from 5p a day for more information, please read our vitamin d faq//b 111//class=f-brand!importantsince vitamin d deficiencies are implicated in several health concerns, the government has identified five at-risk groups, for whom they recommend taking at least 400iu vitamin d 3 daily.although we include 400iu vitamin d 3 in most of our multivitamins, our nutrition advisors agree that a high-strength vitamin d 3 1000iu supplement remains a safe & effective insurance policy to safeguard health, especially for those who get very little sun exposure & the over 65s. our vitamin d 3 1000iu capsules provide vitamin d in the preferred, highly-bioavailable form of 'd 3'. we've chosen to suspend our vitamin d 3 in sunflower seed oil to aid absorption. capsules are better suited to oil-based materials, which is why we've decided to use them over tablets. unlike many other companies, we manufacture & package our high-performance vitamin d 3 1000iu in uk factories working to strict to good manufacturing practice (gmp) to ensure our quality standards are always met. since we use gelatine in our formula, this product isn't suitable for vegetarians or vegans. if you're looking for a plant-based alternative, we recommend our vegan vitamin d 3//p 502//class=f-brand!important. want to learn more about vitamin d 3? drop a line to one of our expert nutrition advisors//aadvice//class=f-brand!important, who are always happy to provide free, confidential advice. just click the 'nutrition advice' button located at the bottom right-hand of our website to start a live chat. find out more about the health implications of low vitamin d 3 levels here//b 777//class=f-brand!important. what does vitamin d 3 contribute to? vitamin d 3 contributes to the normal absorption & utilisation of calcium & phosphorus & the maintenance of normal bones, teeth, & muscle function. it also contributes to the normal function of the immune system, healthy inflammatory responses & normal cell division. //p 503