Vitamin D in Pakistan: Why the Sun Isn’t Reaching You, and a Fix
Twenty minutes. That’s roughly what an uncovered pair of forearms and shins needs under a high Pakistani sun for the skin to make a useful amount of vitamin D, three or four times a week. It sounds trivially easy in a country that’s sunny most days of the year, and yet vitamin D deficiency (vitamin D ki kami) is one of the commonest findings on any blood test in Lahore, Karachi or Peshawar. This Desi Remedies guide explains why the sun isn’t reaching people, what a realistic exposure routine looks like, what food can and can’t do, and why the test and the dose are a doctor’s decision rather than a pharmacy’s.
In brief
- Why it’s common here: full-cover clothing, indoor days, smog and dust, darker skin that needs longer, and sun at the wrong hours.
- The window: when your shadow is shorter than you are, roughly 10am to 3pm, arms and legs bare, no glass in between.
- Realistic dose of sun: about 15 to 20 minutes, 3 to 4 times a week, a little longer for darker skin and in winter or smog. This is guidance, not a prescription.
- Food: helps a little. Oily fish, egg yolk, fortified milk. Rarely enough on its own.
- Tests and tablets: a 25-hydroxy vitamin D blood test, and a dose set by a doctor. No self-prescribed injections, no monthly mega-doses “just in case”.
Prefer to listen? This post as a 5 min video
Why a sunny country is deficient
Vitamin D is made in the skin when a specific band of ultraviolet light (UVB) hits it, and that band is only strong enough when the sun is high in the sky, and it doesn’t pass through glass, cloth, thick smog or the sunscreen you’re supposed to wear on your face. Line those facts up against a normal Pakistani day. The mystery disappears.
Clothing covers most skin most of the time. A shalwar kameez with a dupatta, an abaya, a full-sleeved shirt and trousers, a hijab: all sensible, all leaving perhaps the hands and face exposed, and the face is the one part you should be protecting from sun anyway. Indoor life has become the norm: office, car, home, mosque, market under a canopy, and the sun met only through a windscreen, which blocks UVB entirely. The hours are wrong: the walk to the bus at 7am and the roof at 6pm feel like sun but make almost no vitamin D, because the sun is too low. Smog and dust in Punjab from November to February cut UVB sharply, in the very months people are most covered. And darker skin, which most of us have, contains more melanin, which is a natural sunscreen; the same 15 minutes that’s enough for pale skin gives brown skin a fraction of the vitamin D, so we need longer, not less.
Add pregnancy and breastfeeding (higher needs, more covering), older age (skin makes less), extra weight (vitamin D gets stored in fat and stays there), kidney and liver disease, and a few medicines, and the doctor’s first guess on a tired, achy patient is usually right.
A realistic sun routine
The aim is enough UVB on enough skin, often enough, without burning and without giving the face a tan or worsening pigmentation. Face and neck stay covered or sunscreened; arms and legs do the work.
- Pick the window. Stand outside and look at your shadow. Shorter than your height means the sun is high enough; that’s roughly 10am to 3pm across most of the year in Pakistan, narrower in December and January.
- Expose the right skin. Forearms to the elbow and lower legs to the knee, or the back if you have private space (a rooftop, a courtyard, a balcony). About a quarter of the body’s skin is a good target. Bare, not through a thin dupatta, and not through a window.
- Time it by skin tone and season. Fair to wheatish skin: 10 to 15 minutes in summer, 15 to 20 in winter. Brown to dark skin: 15 to 20 minutes in summer, 20 to 30 in winter or smog. In June, take those minutes at 10am or 3pm rather than at 1pm. Stop well before any pinkness; a tan or a burn isn’t the goal and adds nothing.
- Three or four times a week. Vitamin D is stored, so it doesn’t need to be daily. A rooftop chai at 11am on Tuesday, Thursday and Sunday, sleeves pushed up, is a plan.
- Protect the face regardless. Two finger-lengths of sunscreen for the face alone, more for the neck, or a dupatta and shade. If you have no pigmentation trouble, a few minutes of face and hands in the sun adds a little, but the face is a small area for vitamin D and the part most prone to melasma and tanning. Our two-finger rule guide has the method.
Modesty and vitamin D can coexist; a courtyard, a women-only rooftop hour, or a back garden at noon solves it for most households. For those who can’t manage any bare-skin sun, supplements chosen by a doctor are the honest answer.
Before you buy anything
Try 4 weeks of the routine above and note energy, aches and mood in a phone note each Friday. It costs nothing and it’s the same first step a sensible doctor would suggest for a mildly low result. If you’re still tired and achy after a month, or you’re in one of the higher-risk groups below, that’s when the blood test is worth the money.
What food can and can’t do
Very few foods carry much vitamin D. Oily fish is the real one: a 100 g portion of salmon, mackerel, sardines or the local machli like bam or surmai twice a week is a meaningful contribution. Egg yolk gives a little (2 eggs a day helps at the margin), and so do mushrooms that have seen sun. Milk in Pakistan is not routinely fortified; some packaged brands are, and the carton will say so on the panel, so check before assuming. Ghee, butter and desi murgh carry small amounts. Everything else, including green vegetables, daal, almonds and “vitamin D-rich” sharbats, contributes essentially nothing.
So food is a support, not a fix. What food does do is supply the calcium that vitamin D exists to absorb, and a diet with dahi, milk, paneer, til, ragi, small fish eaten with their bones and leafy greens gives the vitamin something to work on. Vitamin D without calcium is a half-finished job.
Winter sunbathing was a household habit before it was a prescription. Charpais dragged into the courtyard at noon, babies oiled and laid in the December sun for a few minutes, elders shelling peas on the roof with their shins bare. Unani and Ayurvedic tradition both prize morning and winter sun as strengthening for bones and mood, described as tradition rather than proof, and the old timing (short, regular, midday in winter) happens to be the right one.
The test, the numbers, and the doctor’s call
The test is a blood level of 25-hydroxy vitamin D. Most labs and doctors call below 20 ng/mL (50 nmol/L) deficient, 20 to 30 ng/mL insufficient, and above 30 ng/mL adequate; some use 30 as the cut-off. Ask which unit your lab reports, because ng/mL and nmol/L differ by a factor of 2.5 and people have been treated for a “deficiency” that was a unit mix-up.
Who is worth testing rather than guessing: pregnant and breastfeeding women; anyone fully covered outdoors; older adults, especially with falls or bone pain; people with obesity, kidney or liver disease, gut conditions that affect absorption, or on anti-epileptic or steroid medicines; anyone with a low-trauma fracture or osteoporosis; and anyone with months of unexplained bone pain, muscle weakness or fatigue. Everyone else can reasonably start with the sun routine.
The dose is the doctor’s part, and here’s why it matters. The everyday reference amount for an adult is small, about 600 to 800 IU a day, and that’s what a maintenance tablet or a fortified food provides. Treating a real deficiency uses much higher amounts for a fixed number of weeks, then drops back to maintenance, and that plan depends on the blood level, your weight, your kidneys, your calcium and whether you’re pregnant. The Pakistani habit of a 600,000 IU injection every few months from the pharmacy, with no test before or after, is the opposite of a plan. Vitamin D is fat-soluble and builds up. Too much causes high calcium: nausea, thirst, passing urine constantly, constipation, confusion, kidney stones and, in the worst cases, kidney damage. Nobody has ever got there from the sun; people get there from injections and mega-dose sachets taken on a neighbour’s advice.
Myth: sunscreen is why everyone is deficient
The lab logic is right (sunscreen blocks UVB) but the real-world numbers aren’t. Most people apply far less sunscreen than the tested amount, miss patches, and don’t reapply, so plenty of UVB gets through; and the face, where sunscreen is used, is a small area. People who use sunscreen daily on the face and expose their arms and legs at midday make vitamin D perfectly well. The deficiency comes from the arms and legs never seeing the sun at all, not from the SPF on the cheeks. Keep the sunscreen. Roll up the sleeves.
Don’t self-prescribe high-dose vitamin D tablets, sachets or injections; the treatment dose depends on a blood test, weight, kidney function and calcium, and repeated 200,000 or 600,000 IU injections without testing can push calcium dangerously high. Pregnant and breastfeeding women should have their vitamin D and calcium plan set by their doctor, not the pharmacy. Anyone with kidney disease, kidney stones, sarcoidosis, high calcium, or on digoxin or thiazide water tablets needs a doctor before any vitamin D supplement. Nausea, constant thirst, frequent urination or confusion while taking vitamin D means stop and get a calcium test. Never let a baby or child sunbathe for long or burn; infant vitamin D drops are a paediatrician’s call at a fixed daily dose. Sun exposure must stop before the skin turns pink; a burn is skin damage, not a vitamin dose. People with a history of skin cancer, or on medicines that make skin sun-sensitive, should ask before deliberate sun and rely on supplements instead.
Questions people ask
Does morning sun at 7am give vitamin D?
Almost none. The sun is too low and the UVB is filtered out by the atmosphere. Morning light is good for sleep and mood; for vitamin D you need the 10am to 3pm window when your shadow is shorter than you.
Can I get vitamin D through a window or in the car?
No. Ordinary glass blocks UVB. An office window and a car commute add up to zero.
Is vitamin D deficiency why my back and legs ache?
It can be; bone and muscle aches, weakness and tiredness are the classic symptoms, but they’re also symptoms of a dozen other things. That’s the case for a test rather than a guess, especially if you’re covered outdoors or indoors all day.
What about vitamin D for children?
Breastfed babies and children who are kept indoors or covered are at real risk, and rickets still turns up in Pakistani clinics. Infant drops and childhood doses are set by a paediatrician; short, regular, gentle sun on arms and legs for older children is safe and useful.
Is the 600,000 IU injection dangerous?
It’s a treatment for proven, significant deficiency, given under a doctor with a plan and follow-up. As a routine “boost” every season without a test, it risks high calcium and kidney harm. One injection prescribed after a test is medicine; a habit of them is not.
Does winter joint stiffness mean I’m low on vitamin D?
Not necessarily; cold, less movement and arthritis all stiffen joints in winter. Our winter joint stiffness guide covers the everyday causes, and a test settles the vitamin D question if the aches are new or unusual.