Why Do We Need Calcium & Vitamin D3 Daily?

Why Do We Need Calcium & Vitamin D3 Daily?

Calcium & Vitamin D3 are two fundamental nutrients which work together to protect the body in a vast number of ways. Both are essential for life, and have similar functions, but are completely dependent on each other. Without vitamin D, calcium cannot be absorbed, utilised or ultimately used by the body at all. Inadequate intake of both calcium and vitamin D has been linked to osteoporosis, bone fractures and cardiac signalling problems. Similarly, a nasty condition known as rickets, characterised by a curvature of the skin and weak bones.


The lack of sunlight in the UK, as well as difficulty of consuming it through our diets, has put us all at risk of vitamin D deficiency and now 1 in 5 people in the UK are currently deficient in vitamin D, and subsequently, calcium too.

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To prevent becoming deficient, you can increase your intake of calcium through eating dairy foods such as cheese, milk and yoghurt; however, these often come with excess calories and are not the most effective way to increase your vitamin D intake.

Let’s look into more detail about what both calcium and vitamin D do, and why we need them…

What is Calcium?

Calcium is perhaps the most essential mineral the body needs for strong healthy bone and teeth formation, along with muscle function and cardiac signalling (keeping the heartbeat regular). Each year, 20% of the calcium in adult bones is completely replaced, essentially meaning new bone cells are formed and old ones are broken down. Each day, we lose calcium to bones, nails, and through urine and sweat. It is therefore essential that we ingest it daily either through the diet or supplementation. Fall short and you could put yourself at risk of rickets, brittle bones, or osteoporosis.

Benefits of Calcium

• Helps maintain healthy strong bones
• Decreases the risk of bone fractures
• Keeps the heart beating regularly
• Helps the body metabolise iron
• Aids nervous system functioning.

In order for calcium to be absorbed, the body must have a sufficient supply of vitamin D.

What is Vitamin D?

Also known as the sunshine vitamin, vitamin D is a fat soluble vitamin which plays a number of essential roles in the body. Vitamin D is firstly responsible for supporting a healthy immune system; in fact, recent studies have found daily vitamin D supplementation could reduce the risk of cold and flu by up to 50%. The other important role vitamin D plays is in maintaining mineral balance in the body. It assists the absorption and utilisation of calcium and together they support healthy bones and teeth. Vitamin D comes in two forms with D3 being the most important, as it is the preferred form by the body.

Recommended daily amount: UK & US – 10ug/day.

Benefits of Vitamin D

• Essential for healthy teeth and bones
• Boosts immune system function
• Reduces the risk of osteoporosis
• Improves muscle strength
• Essential for calcium and phosphorus absorption

Why consume Calcium and Vitamin D3?

Combined, calcium and D3 make the most perfect blend of two of the most essential nutrients to support bone health. Without vitamin D, calcium wouldn’t be able to be absorbed and you’d be at severe risk of osteoporosis.

Benefits of Calcium and D3

  • 100% RDA Vitamin D
  • 100% RDA Calcium
  • Maintains healthy strong bones
  • Prevents the risk of Osteoporosis
  • Contributes to healthy teeth
  • Supports a healthy immune system

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Adam Barrett

Adam Barrett

Resident Health and Fitness Expert