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The sunshine vitamin

Vitamin D and depression

One of the most consistent nutrient links to low mood — and one of the easiest to check.

Low vitamin D is one of the most consistent nutritional associations with depression, and deficiency is very common — especially in winter, at higher latitudes, and postpartum. Vitamin D receptors sit throughout the brain, including mood-regulating regions. You can raise levels through safe sun exposure, fatty fish, egg yolks and fortified foods, and — if you're deficient — supplements guided by a blood test. It's a simple thing to check if your mood isn't right.

People with depression are more likely to have low vitamin D, and vitamin D receptors are found in brain regions involved in mood. While supplementation isn't a guaranteed antidepressant, correcting a deficiency often helps overall wellbeing and energy.

Why so many people are low

We make vitamin D from sunlight on skin, but indoor lifestyles, sunscreen, darker skin, higher latitudes and winter all reduce production. New mothers — often indoors, exhausted and depleted — are especially prone to deficiency, which can compound postpartum low mood.

How to get more vitamin D

  • Safe sun: short, regular daylight exposure (with sensible skin protection)
  • Food: fatty fish (salmon, sardines), egg yolks, fortified milk and cereals, some mushrooms
  • Supplements: often needed to correct a true deficiency — dose guided by your provider

Get your level checked

A simple blood test tells you where you stand. If your mood or energy is low — particularly after birth or through winter — ask your provider to check vitamin D (and iron). It's an easy, high-value step.

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Common questions

Frequently asked

Can low vitamin D cause depression?

Low vitamin D is consistently associated with depression, and correcting a deficiency often improves energy and wellbeing. It's not a standalone cure, but testing and correcting low levels is a worthwhile, easy step.

How can I raise my vitamin D naturally?

Safe, regular sun exposure, fatty fish, egg yolks, fortified foods and mushrooms all help. If you're truly deficient, a supplement guided by a blood test is often needed.

Emily Montague, The Postpartum Chef
Written & reviewed by

Emily Montague, The Postpartum Chef

Emily is a chef, mother of five and postpartum-recovery educator who revives the 2,000-year-old zuo yuezi ("sitting month") tradition for modern mothers. Her signature, food-first method helps women rebuild after birth and ease postpartum depression — and she now certifies doulas and midwives to cook it for their own clients.

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