As winter fades and the first signs of spring begin to appear across the UK, many people are starting to spend more time outdoors and enjoy longer daylight hours. But after months of limited sunlight, this is actually the time when vitamin D levels are often at their lowest.
Known as the “sunshine vitamin,” vitamin D is produced in the skin when it’s exposed to sunlight. During the darker winter months in the UK, our bodies typically produce very little of it — meaning many people enter spring with depleted levels.
Why Vitamin D Levels Are Lowest After Winter
Although we often associate vitamin D deficiency with winter itself, research shows that levels tend to be lowest at the end of winter and early spring.
This happens because:
-
The UK receives very little UVB sunlight between October and March
-
Most people spend more time indoors during colder months
-
Diet alone usually doesn’t provide enough vitamin D
By the time spring arrives, many people have gone several months without producing meaningful vitamin D from sunlight.
Signs You May Be Low in Vitamin D
Low vitamin D levels can affect people in different ways, but common signs include:
-
Persistent tiredness or fatigue
-
Low mood
-
Frequent colds or infections
-
Muscle aches or weakness
-
Bone discomfort
Because these symptoms can be subtle, many people don’t realise their vitamin D levels may be low.
Why Spring Is a Good Time to Test
Spring offers a useful moment to check your levels and understand where your health stands after the winter months.
Testing can help people:
-
Understand whether their vitamin D levels are low
-
Decide whether lifestyle or dietary changes might help
-
Monitor overall wellbeing as the seasons change
The Convenience of At-Home Testing
At-home health testing makes it possible to check vitamin levels without needing to arrange a GP appointment or clinic visit. Services such as U-Test’s Vitamin D test allow individuals to collect a sample from home and receive results quickly.
With brighter days ahead, spring is often seen as a time for resetting routines and focusing on wellbeing. Checking vitamin D levels can be a simple step toward understanding how the body has been affected by the darker months of winter.
