Our increasingly internal lifestyle and sun protection has led to the World Health Organisation estimate that at least 1 in 5 adults have insufficient levels of vitamin D, meaning that its highly likely that you, or someone you know, maybe displaying some of the common symptoms of deficiency without even realising. 

My muscles ache all the time, if you are having lots of general muscle aches, this is often the first tell-tale sign of a deficiency. Vitamin D supports muscle function as receptors for it are located all over the body, including in the muscles. Vitamin D enters muscle cells when it is metabolised, enhancing muscle contractions, which is vital for preventing falls and for building muscle strength and bones through exercise. 

I get frequent infections, Vitamin D is vital to the health of the immune system. Without sufficient amounts, our immune cells are unable to react appropriately leaving us more susceptible to infection. 

I feel really down, Vitamin D is understood to play a key role in maintaining healthy levels of serotonin in the brain. Research published in the journal Medical Hypotheses found a specific link between vitamin D deficiency and Seasonal Affective Disorder, which happens when people experience low mood during the winter months, due to a lack of light and sunshine. 

I'm always tired, Vitamin D is essential for converting food into energy. If you regularly feel tired, a lack of vitamin D could mean you're not assimilating nutrients from your food and your body's cellular ability to make energy from what you eat is compromised. A clinical trial published in the journal Medicine found that vitamin D supplementation significantly improved fatigue levels. 

I've got achy joints and bones, Vitamin D is essential to help regulate calcium and phosphate levels in the body, giving it a key role in the functioning of joints and teeth with adequate levels helping to ward off osteomalacia (soft bones) and osteoporosis (loss of bone density) in later life. One study predicted that adults with a vitamin D deficiency, who are older than 50, are more likely to develop pain in their hip and knee joints and noted that the pain is more likely to get worse if the deficiency isn't treated with supplementation. 

Supplementing effectively BetterYou's innovative range of DLux Vitamin D Oral Sprays are specially formulated to deliver vitamin D directly into the bloodstream for optimal absorption. The tiny droplets absorb quickly in your mouth providing fast nutrient uptake. Easy to use on the go and not dependant on food or water, they are fast, effective way to supplement vitamin D and are suitable for the whole family. 

Alternatively, there is also a range of different vitamin D tablets available which can also help to boost your vitamin D levels, including vitamin D3 4000iu and vitamin D3 1000iu (240 tablets).