The Importance of Vitamin D3

There are 5 types of Vitamin D (D1, D2, D3, D4 and D5). Vitamin D2 and D3 are both available in supplement form, however D3 is the preferred for humans, as D2 only works for some people.

Vitamin D3 deficiency is widespread in areas with low sun exposure. It is thought that up to 85% of the population in north Europe are affected to some degree. Optimum Vitamin D levels are important to help prevent the progression of:-

  • Osteopenia (low bone density)

  • Cardiovascular disease

  • Autoimmune disease

  • Rheumatoid arthritis

Vitamin D raises production of antimicrobial peptides, which help flight infections such as influenza. Vitamin D3 encourages the absorption and metabolism of calcium and phosphorous, reducing fracture rate. Particularly important for the elderly, who suffer from osteoporosis and osteopenia, or those on medications causing reduced bone density.

People exposed to recommended quantities of sunlight (needs vary between individuals, considering genetics and geographical location), do not need vitamin D supplements, because they produce sufficient vitamin D synthesis in the skin. However, daily exposure can vary, so consider your lifestyle rather than assuming. For instance if you live in a country lacking in all year round sunshine, wear a lot of sunblock, spend all day inside not exposing your skin to the sun, supplementation may be recommended.

Sunshine is important to activate Vitamin D, promoting absorption of calcium and phosphorous from food in the gut. It also allows reabsorption of calcium in the kidneys, which increases the flow in the bloodstream.

Many of our Cranbrook chiropractic patients work inside all year round lacking direct sun exposure to the skin. This can negatively effect mood and health, particularly during winter months. Have you noticed how you and others get a spring in their step, when daylight hours get longer and days get brighter, especially after a long dark winter in the UK? It’s often recommend people take a good quality Vitamin D3 supplement, between October and April to maintain their Vitamin D levels throughout the UK winter. Always take advice on this as dosages do vary.

Why is Vitamin D so important to us?

Essential for the normal mineralisation of bone, maintaining many organ systems and preventing a low calcium condition which can result in:-

  • Overactive neurological reflexes

  • Spasms of the hands and feet

  • Cramps and spasms of the voice box 

Sunlight and Vitamin D requirements

Exposing your unprotected skin for two sessions of 15minutes of sunlight each week, allows your body to naturally produce adequate Vitamin D. However, there are a number of factors which can affect Vitamin D synthesis:-

  • Distance from the equator

  • Cloud cover

  • Smog

  • Sunscreens

What if I am not exposed to the correct intensity of sun?

You should obtain Vitamin D from foods, however if you are deficient you should consider a good quality Vitamin D3 supplement. People with high risk of vitamin D deficiency must consuming the correct strength supplement daily, to ensure a good level of 25-hydroxyvitamin D in the bloodstream. Vitamin D3 should be taken during the day as it can occasionally disrupt sleep.

Elderly and dark skinned people should consume extra vitamin D for good health. Dark skin requires a higher dose because the melanin pigment acts as a natural sunscreen, blocking absorption of vitamin D from sunlight. Elderly people should also consider higher dosages due to poorer absorption in the gut. 

Who should be careful taking Vitamin D supplements?

Vitamin D must be precisely managed via your GP for those with a history of:-

  • High Calcium levels

  • Sarcoidosis

  • Kidney disease

  • Parathyroid complications

  • Cancer

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