Calcium and Vitamin D3: The Powerful Duo for Bone Health and Beyond

Whether you're following a specific diet or just trying to stay healthy, understanding the roles of calcium and vitamin D3 — and how to get enough of them — is key to long-term vitality.

Bone health is often top of mind when we think of calcium and vitamin D3, and for good reason. These nutrients work hand-in-hand: vitamin D3 helps your body absorb calcium, and calcium gives your bones the strength they need to stay resilient throughout life.

Unfortunately, many people don’t get enough of either nutrient. In fact, low calcium and vitamin D levels are among the most common nutrient deficiencies worldwide — especially in populations with limited sun exposure, dietary restrictions, or age-related absorption issues.

Recent research has shown that inadequate intake of these nutrients can lead to reduced bone mineral density (BMD), increasing the risk of conditions like osteopenia and osteoporosis. It’s a concern that’s relevant for everyone, not just vegans.

There are two main types of vitamin D: D2 and D3. While both can help raise vitamin D levels, studies show that vitamin D3 is more effective and longer-lasting.

Even more compelling, new research from the Universities of Surrey and Brighton shows that vitamin D3 plays an important role in the immune system. It activates the type I interferon signaling system, which is your body’s first line of defense against viruses and bacteria.

This means vitamin D3 isn’t just about bones — it’s a key player in keeping you healthy year-round.

We often associate calcium with milk, but it’s found in many foods — leafy greens, fortified plant milks, nuts, and tofu, to name a few. That said, meeting your daily needs through food alone can be tricky, especially if your diet is restricted in any way or you have higher needs due to age, activity level, or pregnancy.

That’s where supplements can help. Calcium carbonate, for example, is a well-researched form that provides a high level of elemental calcium — and when taken with food, it’s both effective and well-tolerated.

Why Combine Calcium and Vitamin D3?

These two nutrients aren’t just individually important — they work better together. Vitamin D3 improves calcium absorption in the intestines, helping your body actually use the calcium you consume. This combination helps support:

• Strong bones and teeth
  
  

• Balanced calcium metabolism
  
  

• Muscle function
  
  

• Nervous system regulation
  
  

• A healthy immune response
  
  

That’s why combined calcium and vitamin D3 supplements are often recommended as a smart, science-backed choice for everyday health.

To make things even easier, we’ve launched a new chewable supplement:
Calcium + Vitamin D3, with 400mg of calcium and 200 IU of vegan vitamin D3 per tablet.

Whether you're already supplementing or just getting started, this is a simple, tasty option that fits easily into your day — no swallowing required.

Calcium and vitamin D3 are essential for bone health — but that’s just the beginning. These nutrients play a role in everything from immunity to mood balance, heart health, and muscle function.

If you’re not sure whether you're getting enough, now is a great time to evaluate your intake and consider supplementation. Whether through diet, sunlight, or a high-quality supplement, keeping your levels in check is one of the smartest moves you can make for long-term wellbeing.

Strong bones, stronger body, better you — it all starts with calcium and vitamin D3.