Welcome to the UK's new "once a week" Vitamin D supplement. It's been designed by our pharmacists for convenience and strength, helping your body receive, store and release a weekly boost of essential Vitamin D. Everyone needs a Vitamin D supplement during the autumn and winter for healthy immunity and to keep bones, teeth and muscles healthy. Some people need to take vitamin D all year round, especially if you have limited exposure to the sun.Lack of Vitamin D can lead to: Bone and muscle problems Poor immunity Feeling tired and generally unwell.A pack of SynBio Weekly Vitamin D3 Boost contains 10 once a week capsules, giving you a 10 week supply of Vitamin D at the most important time of the year.Just pick a day that suits you and get a whole week’s worth of Vitamin D. SynBio Weekly Vitamin D3 Boost provides 7000IU of premium grade Vitamin D3 in a single weekly dose (providing an average 1000IU daily) The advantages of taking weekly Vitamin D: Convenient Cost effective Easy to remember Trust SynBio