166 Hz can have a positive effect on the endocrine system and help to improve melatonin production. Melatonin is an important hormone that is produced in the pineal gland and is responsible for the day and night rhythm. In general, it can be said that this frequency has a positive influence on the pineal gland, which is also often referred to as the third eye and is also often associated with spiritual experiences.
When listening to frequencies, you should always drink enough water! The frequencies can be listened with speakers as well as with earphones.
Important Disclaimer: Frequencies should not replace medical treatment!
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