Fifteen years ago, it was not thought that Vitamin D supplements were necessary as your body is able produce Vitamin D itself when your skin is exposed to sunlight. Vitamin D can also be absorbed from foods such as liver, oily fish, and mushrooms.However, in recent years, it has become clear that many people do not get enough sunlight on their skin to maintain healthy Vitamin D levels.There are many reasons for this, including the amount of time spent indoors, the use of SPF or sunblock, and particularly in the UK, the sun is not strong enough to provide the exposure we need for Vitamin D manufacture for 4 months of the year. Vitamin D plays many roles in the body. It is most well-known for its part in supporting healthy bones and the absorption of calcium.Vitamin D also supports healthy teeth and normal muscle function, as well as playing a part in supporting a healthy immune system. This is why Public Health England advises that people in the UK consider a daily food supplement providing 10 micrograms of Vitamin D to support healthy bones teeth and muscles. Natures Aid Vitamin D 1000iu has been carefully formulated by our experts to provide 1000iu of Vitamin D in each tablet. Many Vitamin D products are sourced from lanolin (sheep wool), so are not suitable for vegans, however our lichen sourced Vitamin D3 is vegan friendly.You can also rest assured that our Vitamin D is free from gluten, yeast, dairy, soya, and nuts, making it ideal for anyone who may have dietary restrictions.