What Grief Does to Your Body — A Holistic Nutritionist Explains

What Grief Does to Your Body — A Holistic Nutritionist Explains

There is a particular kind of exhaustion that comes with grief that no amount of sleep seems to touch. A heaviness in the limbs that makes ordinary tasks feel monumental. A stomach that refuses to cooperate. A mind that goes blank in the middle of sentences.

For a long time, I thought this was just what grief looked like. After I lost my son Dylan, I moved through my days feeling like I was wading through water. I was a Registered Holistic Nutritionist — I understood the body — and still I was caught completely off guard by how physical grief was. How loud it was in my body.

What I eventually came to understand — and what I want every grieving woman to know — is that what she's experiencing in her body is not weakness. It's not falling apart. It's physiology.

The Stress Response: Why Grief Activates Your Survival System

When we lose someone we love, the brain does not register it as an emotional event alone. It registers it as a threat to survival. The HPA axis — the hypothalamic-pituitary-adrenal axis, which is the body's primary stress communication system — activates in much the same way it would if you were in physical danger.

Cortisol floods the system. Adrenaline rises. Heart rate increases. Digestion slows or stops entirely. The immune system redirects its resources.

The problem is that unlike an acute physical threat, grief doesn't resolve in minutes or hours. The loss is ongoing. The nervous system remains in alert. And so this stress response — which is meant to be temporary — can sustain itself for months, even years.

This is the physiological foundation of grief's exhaustion. You are not lazy. You are not weak. Your body is running a marathon it did not choose, with no visible finish line.

What Chronic Cortisol Does to a Grieving Woman's Body

Sustained elevated cortisol has cascading effects throughout the body and understanding them can help make sense of symptoms that might otherwise feel mysterious or frightening.

Sleep disruption is one of the most common. Cortisol follows a natural rhythm — highest in the morning, lowest at night. Chronic stress disrupts this rhythm, which is why many grieving women find themselves wide awake at 3am or unable to wake in the morning. REM sleep — the restorative stage — is particularly vulnerable.

Digestive changes are also extremely common. The gut-brain axis means that what happens in the nervous system is felt immediately in the gut. Grief can cause nausea, appetite loss, irritable bowel symptoms, bloating, and constipation. This is not psychosomatic. It is neurological.

Hormonal disruption is less talked about but significant. Cortisol is made from the same precursor as progesterone. When the body is under sustained stress, it prioritizes cortisol production — which can reduce progesterone and destabilase the menstrual cycle. Thyroid function can also be affected.

Immune suppression means grieving people get sick more easily and recover more slowly. Research has shown changes in natural killer cell activity and inflammatory markers following significant loss.

The Nervous System at the Heart of It All

Deb Dana, who has done groundbreaking work on polyvagal theory, describes the nervous system as a state of constant surveillance — asking the body whether it is safe. Grief tells the nervous system, repeatedly, that something is wrong.

The vagus nerve — the long, wandering nerve that connects the brain to the heart, lungs, and gut — plays a central role here. When the nervous system is in threat mode, vagal tone decreases. The heart rate becomes less variable. Digestion slows. The capacity for social connection, rest, and restoration diminishes.

Supporting vagal tone through breathwork, gentle movement, warmth, and safe social connection is not luxury. For a grieving body, it is medicine.

What Healing the Body Through Grief Actually Looks Like

None of this means grief is a medical problem to be solved. Grief is a natural, necessary human experience. But it does mean that the body deserves support — not instead of emotional processing, but alongside it.

As an R.H.N., here is what I return to again and again with grieving women:

Eat, even when you can't. Appetite loss is normal, but the body still needs fuel. Small, nourishing, easy foods — broth, fruit, eggs, cooked grains — keep blood sugar stable and give the nervous system something to work with.

Prioritize anti-inflammatory foods. Grief drives inflammation. Omega-3 rich foods (salmon, flaxseed, walnuts), colourful vegetables, and herbs like turmeric and ginger all support the body's inflammatory response.

Support the nervous system directly. Magnesium — found in leafy greens, seeds, and dark chocolate — is depleted by chronic stress and supports both sleep and nervous system function. Adaptogenic herbs like ashwagandha and holy basil can help modulate the cortisol response.

Create physical safety. Warm baths, weighted blankets, gentle stretching, slow walks in nature — these are not indulgences. They are signals to the nervous system that the body is safe.

A Note from My Own Grief

I built Pure Heavenly 27 on the belief that grieving women deserve more than time. They deserve real, body-based support — grounded in science, delivered with compassion.

Dylan's name lives in this brand. The number 27 lives in everything I make. And the women who find their way here remind me, every day, that this work matters.

If you've been wondering why your body feels so different since your loss — this is why. And there is so much that can help.

The Grief–Body Connection A Guide for Women Navigating Loss

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Amanda is a Registered Holistic Nutritionist (R.H.N.) and founder of Pure Heavenly 27, a grief

wellness brand for women. Subscribe to her newsletter for weekly support at the intersection of science and soul