You are eating the same calories you always have. You are exercising the same amount. But your body composition has changed — you are carrying more fat, particularly around the midsection, and you are having to work harder to maintain the same weight you maintained effortlessly five years ago. The a

Why Calorie Counting Is Not Working for You

You are eating the same calories you always have. You are exercising the same amount. But your body composition has changed — you are carrying more fat, particularly around the midsection, and you are having to work harder to maintain the same weight you maintained effortlessly five years ago. The assumption is that you are somehow less disciplined than you used to be. The more likely explanation is that your cortisol levels are elevated, and chronically elevated cortisol is one of the most powerful drivers of fat accumulation, particularly visceral abdominal fat, that exists in human physiology.

What Cortisol Does

Cortisol is a glucocorticoid hormone produced by the adrenal glands in response to stress — physical stress (illness, injury, overtraining), psychological stress (work pressure, relationship problems, financial anxiety), and metabolic stress (poor sleep, blood sugar dysregulation, gut inflammation). In the short term, cortisol is adaptive — it mobilises energy, increases alertness, modulates inflammation, and helps the body respond to demands. In the modern world, however, cortisol is chronically elevated in a way that has no evolutionary precedent, and the long-term consequences are significant and underrecognised.

Chronically elevated cortisol drives fat accumulation through several mechanisms. It increases appetite, particularly for energy-dense carbohydrate-rich foods — this is the cortisol-mediated link between stress and overeating. It promotes the deposition of fat preferentially in visceral adipose tissue (the fat around the organs in the abdominal cavity), which is more metabolically active and inflammatory than subcutaneous fat. It breaks down muscle tissue through proteolysis, reducing the body’s basal metabolic rate — meaning you burn fewer calories at rest. And it interferes with thyroid hormone function, further slowing metabolism.

The Vicious Cycle

Cortisol and insulin interact in a way that is particularly damaging for body composition. Insulin tells cells to store energy; cortisol tells the body to mobilise energy. When both are elevated simultaneously — which happens when you eat carbohydrates while under stress — the insulin signal overrides the cortisol signal, and the energy mobilised by cortisol gets stored as fat rather than used for energy. This is why stress and high-carbohydrate diets together are so much more damaging for body composition than either factor alone.

What Interrupts This Cycle

The most powerful interventions for reducing chronic cortisol are also the most straightforward: sleep is non-negotiable — seven to nine hours of consistent, good-quality sleep reduces cortisol more reliably than any supplement or intervention. Resistance training — particularly heavy compound lifts — is potently stress-reducing and also builds the muscle mass that maintains metabolic rate. Mindfulness meditation has decades of evidence for cortisol reduction; even 10 minutes per day produces measurable effects. Blood sugar stability — eating protein and fat with carbohydrates, avoiding between-meal snacking — reduces the insulin-cortisol interaction that drives fat storage.

This article is for informational purposes only. If you suspect cortisol dysregulation, consult your GP.

Adrenal Fatigue: Real or Misleading?

The term adrenal fatigue has become popular in alternative and functional medicine circles to describe the constellation of symptoms — fatigue, weight gain, difficulty losing weight, sleep disturbance, brain fog — that people experience in association with chronic stress and elevated cortisol. Conventional medicine disputes this term because it does not refer to a condition where the adrenal glands themselves are damaged or unable to produce cortisol. Most people with chronic stress have normal or even elevated cortisol levels and normal responses to standard stimulation tests.

What the stress response system actually does in chronic stress is more nuanced than adrenal fatigue suggests. The hypothalamic-pituitary-adrenal (HPA) axis — the system that regulates cortisol production — adapts to chronic stress in ways that can produce symptoms even when cortisol levels appear normal in standard testing. This includes flattening of the cortisol curve (loss of the morning cortisol peak that provides energy and alertness), delayed cortisol onset in response to stress, and impaired cortisol recovery after stress. These patterns are associated with the same symptoms that characterise adrenal fatigue and are more accurately described as HPA axis dysregulation.

The testing for HPA axis function — which requires multiple salivary cortisol samples throughout the day, or a cortisone awakening response test — is more informative than single-point serum cortisol measurements for understanding stress-related symptoms. Treatment focuses on the upstream causes of HPA axis dysregulation: sleep quality, dietary patterns, psychological stress management, and exercise prescription, rather than supplementation with adrenal glandular extracts or cortisol-like compounds, which are both ineffective and potentially harmful.

Why Spot Reduction Does Not Work (But Visceral Fat Is Different)

You cannot reduce fat from a specific area through targeted exercise — doing hundreds of crunches will strengthen your abdominal muscles but will not specifically reduce belly fat. This is well-established in the exercise physiology literature and is the source of considerable frustration for people who are trying to improve their body composition. What is less well-understood is that different fat depots in the body respond to different hormonal signals, and the hormonal environment that characterises chronic stress specifically drives the accumulation of visceral fat, even in people who are not significantly overweight.

Visceral adiposity — fat stored around the organs in the abdominal cavity — is metabolically distinct from subcutaneous fat stored under the skin. Visceral fat is more inflammatory, more metabolically active, and more resistant to mobilisation than subcutaneous fat. It is also more responsive to cortisol and insulin than subcutaneous fat, which means that in an environment of high cortisol and high insulin (which characterises chronic stress combined with a high-carbohydrate diet), visceral fat accumulates preferentially. This is why stress reduction and blood sugar management together are more effective for reducing visceral fat than either intervention alone — they address both of the primary hormonal drivers of visceral fat accumulation.

The practical implication is that people who are stressed and carrying excess visceral fat — the classic android (apple-shaped) body fat distribution — should prioritise stress management and blood sugar control over additional cardiovascular exercise, which alone will not meaningfully reduce the visceral fat depot if the hormonal environment is not addressed. This is not an excuse to skip exercise — resistance training and cardiovascular exercise both have stress-reducing and insulin-sensitising effects that indirectly support visceral fat loss. But the primary targets for intervention are cortisol through stress management and insulin through dietary modification.