Cortisol, often called the "stress hormone," plays an important role in regulating your body’s response to stress. However, consistently high levels of cortisol can lead to problems such as anxiety, fatigue, weight gain, and trouble sleeping. While lifestyle changes like meditation, exercise, and proper sleep are essential, certain supplements can also help naturally lower cortisol levels. Amazon offers a wide range of options, but to make things easier, we’ve rounded up the 5 best supplements to lower cortisol based on popularity, effectiveness, and customer reviews.
1. Ashwagandha (KSM-66)
Ashwagandha is one of the most well-known adaptogens for stress relief. Research shows it can reduce cortisol levels, improve sleep, and promote a calm state of mind. The KSM-66 extract, in particular, is highly concentrated and clinically studied for effectiveness.
On Amazon, you’ll find ashwagandha in capsules, powders, or gummies. Many users report better stress management, reduced fatigue, and improved focus after consistent use. It’s also known to support energy levels without overstimulation, making it a natural choice for both daytime use and nighttime relaxation.
If you’re looking for a trusted herbal supplement to support your adrenal health and lower cortisol, Ashwagandha is one of the best starting points.
2. Rhodiola Rosea
Another powerful adaptogen, Rhodiola Rosea has been used for centuries to combat fatigue and improve resilience to stress. It helps regulate cortisol levels while boosting mental performance, focus, and endurance—making it especially popular among students and professionals.
Amazon offers a variety of Rhodiola supplements, typically standardized to rosavins and salidroside, the active compounds. Users often notice improvements in mood and reduced burnout after regular use. It’s particularly helpful for those who feel mentally drained or physically exhausted from high-stress lifestyles.
Unlike caffeine, Rhodiola provides natural energy without jitters or crashes. For anyone looking to balance stress hormones while maintaining productivity, this supplement is a strong choice.
3. L-Theanine
L-Theanine, an amino acid commonly found in green tea, is well-known for its calming effects. It promotes relaxation without drowsiness, making it a great supplement for reducing stress-related cortisol spikes. When paired with caffeine (like in tea), it enhances focus while keeping anxiety in check.
On Amazon, L-Theanine supplements are available in standalone capsules or blends with other calming ingredients. Many users take it to help with stress, sleep quality, and even meditation. Studies show it can reduce cortisol responses to stressful situations, helping the body maintain balance.
If you prefer a gentle, non-habit-forming option to calm your mind and lower stress hormones, L-Theanine is an excellent supplement to consider.
4. Magnesium Glycinate
Magnesium is a crucial mineral for overall health, and deficiencies are linked to higher cortisol levels and poor stress management. Magnesium Glycinate is one of the most absorbable and gentle forms, making it ideal for relaxation and sleep support.
Taking magnesium can help regulate the nervous system, reduce anxiety, and promote deeper sleep—all of which contribute to lower cortisol levels. Many users on Amazon report that it helps them unwind at night and wake up feeling more refreshed.
It’s also beneficial for muscle relaxation, which makes it a great choice for people dealing with stress-related tension or fatigue. If you want a mineral-based supplement that supports both mind and body, magnesium glycinate is a top pick.
5. Phosphatidylserine
Phosphatidylserine is a natural phospholipid that plays a key role in brain function and hormone regulation. Studies suggest it can lower cortisol, especially in people under chronic stress or after intense exercise. It’s often used by athletes to speed recovery and by professionals to improve focus under pressure.
On Amazon, phosphatidylserine is typically sold in capsules. Users appreciate its cognitive benefits, including sharper memory, improved concentration, and better mood stability. By reducing cortisol, it helps the body maintain balance during stressful times.
If you’re looking for a science-backed supplement that supports both brain health and stress reduction, phosphatidylserine is a great choice.
Final Thoughts
Managing cortisol levels is key to reducing stress, improving sleep, and supporting long-term health. From herbal adaptogens like Ashwagandha and Rhodiola Rosea to calming compounds like L-Theanine, mineral support from Magnesium Glycinate, and brain-boosting Phosphatidylserine, these supplements from Amazon offer natural solutions to keep cortisol in check