25/05/2026
Vitamin D 3
Why Vitamin D3 matters and especially more in Winter !
Shorter days, weaker UVB rays and more time indoors mean your skin produces far less vitamin D3. This seasonal drop influences several key systems:
• Immune defense — Vitamin D supports immune regulation and helps the body respond to infections. Low levels are linked to more frequent colds and flu. (Research even stated that good vit D levels are better in preventing a cold and flu that even flu vaccines!!!)
• Mood and mental health — Reduced vitamin D is associated with low mood and seasonal affective disorder (SAD), partly due to its role in serotonin regulation.
• Bone and muscle strength — Vitamin D3 helps absorb calcium and phosphorus. Deficiency can contribute to bone pain, muscle weakness and long term bone density loss.
• Energy levels — Persistent fatigue is a common sign of low vitamin D, especially when sunlight exposure drops.
Why Winter Causes Deficiency
• UVB rays are too weak in many regions during winter months for the skin to produce adequate vitamin D.
• More clothing and indoor time reduce skin exposure even further.
• Higher latitudes (including southern Australia in winter) experience a sharper decline in UVB intensity.
How to Maintain Healthy Levels in Winter
Most people can benefit from a winter strategy that combines sunlight, food, and possibly supplements:
• Midday sunlight when possible — Even 10–30 minutes outdoors helps, though UVB may still be limited depending on latitude.
• Vitamin D–rich foods — Fatty fish, egg yolks, fortified milk, cereals and mushrooms exposed to sunlight.
• Supplements — Many adults need additional vitamin D3 in winter, but the only way to know your needs is through a blood test.
• Light therapy lamps — Helpful for mood and may support vitamin D indirectly.
The best D3 supplement is calcifediol monohydrate, ordinary vit D 3 takes a long time to reach adequate levels in the blood and it can take up to 3 month before these blood levels are reached, where as monohydrate can do it in 1 month. So avoid the flu and improve your mood, take vitamin D3. Our clinic stocks the better form of D3, just pop in and we will advise you on how to take it.