Vitamin D3

What it does

Vitamin D3 is the form your body produces naturally from sunlight. It plays a critical role in calcium absorption, bone mineralisation, immune regulation, and mood stability. Most adults over 50 are deficient, especially in winter months or indoor lifestyles. D3 (cholecalciferol) is significantly more effective than D2 (ergocalciferol) at raising and maintaining blood levels.

Key benefits

• Bone density and calcium absorption
• Immune system support
• Mood regulation
• Muscle function

The evidence

Backed by the VITAL trial (25,871 participants) and multiple large RCTs. Strong evidence for bone health and immune function. Most Australians are deficient in winter.