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A government diet and nutrition survey cited by Glamour UK found nearly one in five UK adults aged 19 to 64 had vitamin D deficiency, rising to nearly one in three during winter. Fatigue, bone pain, muscle weakness, frequent illness and low mood may be associated with low vitamin D, but none can confirm a deficiency on its own.
A Glamour UK report published in 2026 has outlined five symptoms that may be associated with low vitamin D, against a backdrop of survey findings that nearly one in five UK adults aged 19 to 64 have a deficiency, rising to nearly one in three in winter. The symptoms—frequent illness, fatigue, bone pain, muscle weakness and depression or low mood—are not specific to vitamin D deficiency, and the report does not present them as a way to diagnose it.
The figures come from the most recent government diet and nutrition survey cited by Glamour UK. The report gives the proportion of adults aged 19 to 64 with vitamin D deficiency as nearly one in five overall and nearly one in three during winter. It does not specify the survey period or provide further details about how deficiency was measured in the material supplied.
The five signs discussed are frequent illness, fatigue, bone pain, muscle weakness and low mood or depression. The report draws on interviews with nutritionists, dietitians and general practitioners, as well as studies linking low vitamin D with some of these outcomes. These links do not establish that low vitamin D is the cause of symptoms in any individual; fatigue and low mood, for example, can have many explanations.
Vitamin D helps regulate calcium and phosphate, nutrients involved in bone, teeth and muscle health, according to the NHS guidance quoted in the report. The body produces vitamin D in response to sunlight, and some foods—including fatty fish and eggs—also contain it. The article says limited sunlight and an unbalanced diet can contribute to deficiency, but it does not give a personalised dose or treatment plan.
Why Symptoms Need Checking
The survey figures suggest that low vitamin D is common among UK adults, with the reported share higher during winter. That makes awareness relevant, particularly for readers with limited sunlight exposure or other risk factors. But a symptom list cannot establish deficiency, and treating symptoms as proof could mean overlooking other causes.
The report’s findings are best understood as a prompt to seek appropriate advice, not as a self-diagnosis checklist. A clinician can assess symptoms and decide whether testing or supplementation is suitable. This distinction matters because the signs named in the article—including tiredness, muscle weakness and low mood—are broad and may be associated with many health conditions.
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Sunlight, Seasons and Vitamin D
Vitamin D is a fat-soluble vitamin that the body makes when skin is exposed to UVB rays. The NHS information quoted by Glamour UK says it helps regulate calcium and phosphate, which support healthy bones, teeth and muscles. The report’s interviewees identify low sun exposure and limited dietary sources as possible contributors to deficiency.
In the UK, the report says sunlight is generally strong enough to support vitamin D production from April through October, while winter conditions can make sun-derived production more difficult. It also identifies spending substantial time indoors and living in a place with limited sunlight as possible risk factors. These are general observations, not a measure of an individual’s vitamin D status.
The article names fatty fish and eggs as dietary sources and discusses supplements as another way people may address intake. Its experts differ in how broadly they describe who should supplement: GP Ahmed El Muntasar says everyone in the UK needs vitamin D, while the supplied material does not include a full official dosing recommendation. Readers should check current NHS guidance or ask a health professional about their circumstances.
“Vitamin D is often called the ‘sunshine vitamin’ because our bodies produce it in response to sunlight.”
— Jessica Sepel, nutritionist and founder of JSHealth Vitamins, as quoted by Glamour UK
Symptoms Cannot Confirm Deficiency
The report describes associations between vitamin D deficiency and several symptoms, drawing on studies that vary in population and focus. It also says research on vitamin D and mental health is still developing. The cited findings do not show that low vitamin D causes depression in every case, nor that supplementation will resolve low mood.
The supplied source does not include the survey’s fieldwork dates, the exact test threshold used to define deficiency, or a full account of the studies’ limitations. It also does not provide enough information to determine whether a particular reader’s fatigue, pain, weakness or repeated infections are related to vitamin D. Symptoms alone cannot establish a deficiency; a health professional can advise on assessment and whether a blood test is appropriate.
Discuss Testing and Supplements
Readers concerned about persistent symptoms or their risk of deficiency can discuss them with a GP or another qualified health professional. The next step may depend on individual factors, including diet, sun exposure, health history and any medicines being taken. The report does not set out a single testing or treatment pathway.
Before starting a supplement, check current NHS advice or seek professional guidance, especially if you have a health condition, are pregnant, or already take medicines or supplements. Follow product directions and avoid assuming that more vitamin D is better. For sun exposure, consider skin protection and avoid treating a fixed number of minutes as safe or sufficient for everyone.
Key Questions
What are the five signs discussed in the report?
The report lists frequent illness, fatigue, bone pain, muscle weakness and depression or low mood as possible signs associated with low vitamin D. None confirms a deficiency on its own.
How common is vitamin D deficiency in the figures cited?
The government survey figures cited by Glamour UK put deficiency at nearly one in five UK adults aged 19 to 64, rising to nearly one in three during winter. The supplied report does not state the survey period or measurement threshold.
Can these symptoms tell me whether I have low vitamin D?
No. Symptoms such as tiredness, pain and low mood have many possible causes. A clinician can assess your situation and advise whether testing is appropriate.
What are possible sources of vitamin D?
The report describes production through sunlight exposure and names foods including fatty fish and eggs. It also discusses supplements; ask a health professional or consult current NHS guidance about whether one is suitable for you.
Source: rss
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