"I have too much stress" — one of the most common phrases of our time. But what does it really mean for your body? What is cortisol, the hormone people keep talking about? And why does chronic stress affect not only mood, but also sleep quality, hair health, digestion and weight? In this article — an educational guide on how stress affects the body on a biological level and what you can really do in everyday life. This article is informational and does not replace a consultation with a doctor.
What stress is from a biological point of view
Stress is not a psychological problem but a biological reaction that evolved to help us stay alive. When our ancestors met a predator, the body would instantly trigger the "fight or flight" response:
- Heart rate sped up
- Blood flow was redirected to the muscles
- Breathing sped up
- Sugar was released into the blood for energy
- Digestion was paused (energy is needed for the fight, not for food)
- The immune system was temporarily suppressed
The modern problem: the body responds the same way to modern "threats" — deadlines, financial issues, family conflicts, traffic jams. But these "threats" don't last for minutes like a predator — they last for months or years.
Cortisol — the main stress hormone
Cortisol is a steroid hormone produced by the adrenal glands (small glands above the kidneys). It is one of the most important hormones in your body — without it you wouldn't survive. But its balance is delicate.
The normal cortisol rhythm
In a healthy body, cortisol has a very clear circadian rhythm:
- 6-8 a.m. — the highest level (called the "cortisol awakening response"). This is your body's "natural alarm clock"
- 9-12 a.m. — gradually decreasing, but still high (energy for the day)
- 1-5 p.m. — continues to fall
- In the evening — a low level, allowing melatonin to "rise" and prepare you for sleep
- At night — at its lowest, allowing tissue repair
When this rhythm is disrupted, problems appear in every area.
The functions of cortisol in the body
- Energy regulation — controls glucose production from reserves
- Anti-inflammatory action — controls the immune system's response
- Maintaining blood pressure
- Memory formation — especially of emotional memories
- Regulating gut function
What happens when cortisol is too high (chronic stress)
Chronic stress is when the body stays in "fight or flight" mode for months or years. The consequences are systemic:
Disrupted sleep quality
High cortisol in the evening blocks melatonin, making it hard to fall asleep or causing shallow sleep. More on sleep — in the article on sleep quality.
Weight changes
Cortisol drives sugar cravings (quick-access energy) and fat storage (especially around the belly). Many people notice they gain weight during stressful periods.
Hair issues
Cortisol damages hair follicles — temporarily halting hair growth. Two to four months after a stressful period, telogen effluvium (temporary hair shedding) often begins. More — in the article on hair loss.
Digestive problems
Cortisol reduces blood flow to the digestive organs. Under chronic stress — constipation, IBS symptoms, reflux.
Suppressed immune system
People under stress get more colds and slower-healing wounds.
Cognitive function
Memory worsens, focus becomes harder, the "brain fog" feeling sets in.
Hormonal imbalance
Cortisol competes with other steroid hormones (oestrogen, testosterone, progesterone). Chronic stress is one of the most common causes of menstrual disturbances and libido problems.
Scalp issues
Increased sebum production, acne, dandruff. More — in the article on scalp health.
Signs you have too much stress
A practical checklist — mark the ones that apply to you:
- Hard to fall asleep in the evening, even when tired
- Waking up at 2-4 a.m. and unable to fall back asleep
- Feeling tired in the morning even after 8 hours of sleep
- A need for sugar or coffee to "recover" during the day
- Easily irritated by small things
- More colds and infections than before
- Hair starting to shed more
- Menstrual irregularities (in women)
- Reduced libido
- Digestive problems
- Headaches at the end of the day
- Weight gain around the abdomen
- Difficulty focusing
Three or more from this list — it's worth reviewing your lifestyle.
Daily solutions (lifestyle)
Stress management starts with simple things that require consistency:
1. Sleep hygiene
- The same time to go to bed and to get up every day
- A dark bedroom
- A cool temperature (16-19 °C)
- Avoiding screens 1 h before bed
- Avoiding caffeine after 2 p.m.
2. Physical activity
- 30 min of moderate-intensity activity per day
- Walking, swimming, yoga, cycling — all fit
- Morning or daytime — better; evening can disrupt sleep
- NOT too intense — that can raise cortisol
3. Nutrition
- Balanced proteins, fats, carbohydrates
- Smaller sugar swings (less processed foods, less refined sugar)
- Omega-3 (fish, flax seeds)
- Magnesium (seeds, leafy greens, dark chocolate)
- B-group vitamins
- Enough water
4. Breathing practices
Slow, deep breathing directly activates the parasympathetic nervous system ("rest mode"):
- 4-7-8 method: inhale for 4 sec, hold for 7 sec, exhale for 8 sec
- Box breathing: 4 sec inhale, 4 sec hold, 4 sec exhale, 4 sec hold
- 5-10 minutes a day — enough to start
5. Morning sunlight
10-15 minutes of morning sunlight helps set your cortisol rhythm and stimulates melatonin production in the evening.
6. Social support
Regular contact with loved ones and friends biologically lowers cortisol.
7. Hobbies and rest
Regular time for things that are simply enjoyable — without an achievement goal.
Adaptogens — natural support for managing stress
Adaptogens are a group of plants traditionally used for "helping the body adapt to stress". Scientific research on these plants is expanding, but many effects are still being studied.
The most popular adaptogens:
- Ashwagandha — a traditional Ayurvedic plant. More — in the article on ashwagandha
- Rhodiola rosea — used in Scandinavian traditional medicine
- Holy basil (tulsi) — an Ayurvedic plant
- Eleutherococcus (Siberian ginseng)
- Reishi mushroom — traditional in Asian medicine
More about adaptogens — in a separate article.
When to see a specialist
Stress that strongly affects daily functioning calls for professional help:
- The level of stress remains high even after lifestyle changes
- Symptoms of anxiety or depression appear
- You can't carry out work or family duties
- Physical symptoms appear (headaches, digestion, chest pain)
- You use alcohol or other substances to manage stress
- Thoughts of self-harm
Specialists who can help:
- Family doctor
- Psychologist or psychotherapist
- Psychiatrist (if medication is needed)
- Endocrinologist (if you suspect a hormonal imbalance)
Food supplements in the context of stress management
Food supplements are NOT a replacement for treatment or lifestyle changes — but they can be a supportive measure if other factors are being addressed.
From our range — the Stress Shield complex is designed in the context of supporting stress and cortisol. Its formulation contains adaptogens and vitamins/minerals that are traditionally used in this context. Like any other food supplement, it does not diagnose, treat or replace a doctor's consultation. Before starting — consult your doctor, especially if you:
- Take medications
- Are pregnant or breastfeeding
- Have health conditions
- Are under 18
Frequently asked questions
Can cortisol levels be measured?
Yes. There are three types of tests: blood (single point), saliva (several times during the day, showing the rhythm), urine (24 h). The saliva test is best for assessing the cortisol rhythm. Talk to your doctor.
How long does it take for cortisol to normalise?
With consistent lifestyle changes — visible changes in 4-12 weeks. Full balance restoration — 3-6 months. In severely neglected cases — even up to 12 months.
Does coffee raise cortisol?
Yes, caffeine raises cortisol, especially if you drink it in the morning (when cortisol is naturally high). It's better to switch to 1-2 cups a day and avoid it after 2 p.m. Green tea is a gentler alternative thanks to L-theanine.
My stress isn't from work. Is it still worth trying these solutions?
Yes. The body's stress response is the same regardless of the source (work, family, finances, health). Lifestyle rules work for all types.
Does magnesium really help with stress management?
Magnesium is one of the minerals whose deficiency is often linked with stress symptoms. In Lithuania many people have a magnesium deficiency due to diet and water softening. Food (seeds, nuts, leafy greens) is the first choice. Supplements — talk to your doctor.
Summary
Stress is a biological reaction that's helpful for short-term survival but becomes a serious health problem when it's chronic. A cortisol imbalance affects the whole body — from sleep to hair to digestion. The main solutions are lifestyle: sleep hygiene, physical activity, balanced nutrition, breathing practices, sunlight, social ties. Adaptogens and food supplements can be a supporting tool, but not the main solution. If stress strongly affects life — see a specialist. More about specific adaptogens — in the article on adaptogens.
This information is educational and does not replace a professional medical consultation. Before making significant lifestyle changes or starting food supplements — consult your doctor.
