Common signs of low vitamin D
Low vitamin D can affect energy, mood, immunity, and bone health.
- Fatigue
- Bone pain
- Muscle weakness
- Low mood or irritability
Get checked if you have low sunlight exposure, limited dairy intake, or ongoing fatigue.
- Ongoing tiredness and low energy
- Bone pain, especially in the lower back, hips, or legs
- Muscle weakness, aches, or cramps
- Getting sick more often, since vitamin D supports immune function
- Low mood or depression
- Slow healing of wounds
- Hair loss in some cases
Severe or long-term deficiency
- Adults: osteomalacia, where bones soften and become painful, with a higher risk of fractures and osteoporosis.
- Children: rickets, which causes bowed legs, delayed growth, soft bones, and delayed walking.
Who is at higher risk
- People with little sun exposure, such as those who work indoors, cover most of their skin, or use sunscreen heavily
- People with darker skin, since melanin reduces vitamin D production
- Adults over 65
- People who are overweight or obese
- People with celiac disease, Crohn's disease, kidney or liver disease, or who have had gastric bypass
- Exclusively breastfed infants who aren't given supplements
Vitamin D deficiency is very common in South Asia, including Pakistan, despite the sunny climate. Indoor lifestyles, clothing, and air pollution all reduce how much vitamin D the skin makes.
What to do
A blood test for 25-hydroxyvitamin D confirms the level. Treatment usually means vitamin D3 supplements, with the dose depending on how low your level is, plus sensible sun exposure and foods like oily fish, egg yolks, and fortified milk. Don't start high-dose supplements without medical advice, because too much vitamin D can raise blood calcium to harmful levels.
Many of these symptoms overlap with other conditions, so testing is the only reliable way to know.
