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Chronic fatigue? Your indoor routine could be the cause of Vitamin D deficiency

Vitamin D, often called the sunshine vitamin, plays a huge part in keeping your bones strong, your immunity sharp, and your mood steady. But with so much time spent indoors, between remote work, endless screens, and home routines, many of us are running low on it, often without even knowing. Here’s how to recognise the subtle warning signs, why your indoor life could be partly to blame, and a few simple ways to sort it out.

July 09, 2025 / 13:31 IST
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Diet tips to avoid Vitamin D deficiency: Simple swaps like adding oily fish (salmon or mackerel), egg yolks, or fortified cereals can gently boost your vitamin D through your meals (Image: Canva)

I honestly can’t remember the last time I soaked up proper sunlight. With hectic workdays, work calls, and evenings spent curled up indoors, I almost lost track. It wasn’t until a routine blood test flagged up low vitamin D that I realised something was off. My doctor explained that sunlight helps our bodies make this essential vitamin naturally, but without enough of it, your bones, your mood, even your energy levels can all suffer. It’s surprising how many of us are missing out on this free, everyday nutrient.

According to the National Institutes of Health (NIH), sunlight is the body’s main source of vitamin D. But thanks to our modern, mostly indoor lives, along with limited sun in some areas, deficiency is becoming increasingly common. If you’ve been feeling unusually drained, it might not just be stress or lack of sleep. Low vitamin D often shows up as a deep tiredness. You could be spending plenty of hours in bed, but still feel lethargic.

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Also read | Best ways to boost your vitamin D naturally: Sunlight, foods, and supplements

It doesn’t stop at physical fatigue, low vitamin D levels have been linked to feelings of low mood, anxiety, and sudden mood swings. If you’ve been feeling more down, snappy, or unsettled than usual, your indoor habits may well be playing a part.