Amid a flood of quick-fix tips and “miracle” supplements, claims about cortisol, the well-known stress hormone, have surged across social media platforms. Some self-proclaimed experts claim they can regulate cortisol levels, improve sleep, aid weight loss, and even reduce chronic stress. But the scientific reality is far from these bold assertions.
🧪 Cortisol: A Natural Function, Not a Disease Indicator
According to Professor Guillaume Assié, an endocrinologist at Cochin Hospital in Paris, cortisol, produced by the adrenal glands, plays a natural role in managing stress, metabolism, and the immune system.
The body releases cortisol following a regular daily rhythm—peaking in the morning and gradually decreasing throughout the day. Significant deviations, whether high or low, are extremely rare and usually occur only in specific medical conditions like Cushing’s syndrome or Addison’s disease.
💰 Myths Driven by Profit
Some self-styled “nutrition coaches” exploit these concepts to sell programs, diets, and supplements that claim to reduce cortisol and produce “magical” results. They often promote the idea of “adrenal fatigue,” alleging that millions suffer from weak adrenal glands due to chronic stress.
However, the French Endocrine Society confirms that this concept has no scientific basis, and reviews of multiple studies have deemed it a mere myth.
Even biological and at-home cortisol tests sold online—ranging from €300 to €1,500—are unreliable, potentially leading to financial loss, health confusion, and a drift away from proper medical care.
✅ The Bottom Line: No Need to Panic
Experts emphasize that, outside of recognized medical conditions, there is no reason to worry about daily cortisol levels. All social media claims are primarily profit-driven, rather than scientifically valid health advice.
