How to Lower Cortisol: What Actually Works

By the Nova Pharma team · Published April 22, 2023 · Updated November 13, 2026

The best-documented way to keep cortisol in check is good sleep: after a single short night, evening cortisol was 37 to 45% higher in a 1997 study. Meditation, moderate physical activity and some supplements, such as ashwagandha, may also help.

What is cortisol?

Cortisol is a hormone made by the adrenal glands that helps the body respond to stress. According to the StatPearls medical reference, it is involved in:

carbohydrate, fat and protein metabolism;
blood sugar regulation;
the inflammatory and immune response;
blood pressure;
the sleep-wake cycle: it is naturally higher in the morning and lower in the evening.

So cortisol is not "bad." The problem starts when stress lasts and the natural curve gets out of rhythm.

What are the signs of high cortisol?

Ongoing stress often shows up as fatigue, poor sleep, irritability and cravings. These signs are very common, however, and do not prove a cortisol problem on their own.

Large, prolonged cortisol excess, as in Cushing's syndrome, is a disease. Its signs are more pronounced: weight gain in the face and abdomen, high blood pressure, fragile skin and muscle weakness, according to the NIDDK. Only a doctor can diagnose it, using blood, urine or saliva tests. If you recognize these signs, see a doctor.

Which strategies actually help manage cortisol?

Sleep and stress management come first; supplements come after. Here is a summary of the evidence:

Strategy	What studies say	Limits	Source
Sleep	One short night raises cortisol the next evening	Small study (10 men)	Leproult, 1997
Mindfulness	Lower cortisol and blood pressure	Modest effects, varied studies	Pascoe, 2017
Exercise	Low intensity: decrease; high intensity: temporary rise	Acute effect, not long term	Hill, 2008
Ashwagandha	Lower morning cortisol than placebo after 8 weeks	Small trials (60 adults)	Lopresti, 2019
Magnesium	Possible effect on mild anxiety	Low-quality evidence	Boyle, 2017

Why is sleep the priority?

Because lack of sleep directly disrupts the cortisol curve. In the Leproult study, a single night of reduced sleep was enough to raise cortisol the following evening, when it should be falling. The Canadian guidelines recommend 7 to 9 hours of sleep a night for adults, at regular times. Read our tips to restore a stable sleep cycle.

Does meditation lower cortisol?

Yes, modestly. A 2017 meta-analysis on mindfulness found lower cortisol and blood pressure compared with control groups. Another, published in 2014 and covering 47 trials and 3,515 participants, found small to moderate effects on anxiety and perceived stress. Five to ten minutes a day, at a set time, is enough to start.

What type of exercise should you choose?

Regular, moderate activity is your best ally. A 2008 study showed that low-intensity exercise (40% of capacity) lowers cortisol, while efforts of 60% and above raise it temporarily. That rise is normal after exercise. But if you are already very stressed and sleeping poorly, alternate intense sessions with walking, easy cycling or yoga.

Which supplements may help?

Ashwagandha is the most studied ingredient, but supplements add to good habits rather than replace them.

Ashwagandha

Studies on ashwagandha suggest an effect on stress and cortisol. In a 2019 trial, 60 stressed adults took 240 mg of extract or a placebo for 60 days: morning cortisol dropped more in the ashwagandha group. Another 2019 trial points the same way. These studies are still small. Read our article what is ashwagandha and what does it do.

Zen gummies provide 130 mg of ashwagandha extract per gummy. Used in herbal medicine as an adaptogen, ashwagandha helps increase energy and resistance to stress.

Magnesium

Magnesium supports nervous system function, but the evidence on stress is weak. A 2017 systematic review noted a possible effect on mild anxiety, from studies of limited quality. Mg Pro, our Magnesium Complex, combines magnesium bisglycinate, taurine and vitamin B6.

Cortixia

Cortixia combines GABA, magnesium, melatonin, L-theanine, vitamin C and ashwagandha in a formula taken at bedtime. These ingredients help improve sleep quality, the first lever against the effects of stress. For a complete routine, also discover the Synergy Trio.

What precautions should you take?

Ashwagandha: not recommended during pregnancy or breastfeeding, before surgery, or with an autoimmune disease or thyroid disorder, according to the NCCIH. Interactions with some medications are possible.
Melatonin (in Cortixia): may cause drowsiness; avoid driving after taking it.
All products: follow the label directions and add one product at a time.

Frequently asked questions

How long does it take to lower cortisol?

Sleep works within days. In ashwagandha studies, effects were measured after 8 weeks.

Does coffee raise cortisol?

Caffeine can raise cortisol temporarily, especially in people who rarely drink it. If you sleep poorly, avoid it in the afternoon.

Does cortisol cause belly fat?

Large, prolonged excess, as in Cushing's syndrome, promotes abdominal fat. For everyday stress, the link runs mainly through sleep and diet. Read our article on sustainable weight loss.

Can you measure your cortisol?

Yes, with a blood, urine or saliva test ordered by a doctor. Levels vary a lot depending on the time of day.

Can you take Zen and Cortixia together?

Both contain ashwagandha. Ask a pharmacist or health care professional before combining them.