The amount of deep sleep needed can vary depending on individual factors such as age, overall health, and lifestyle. However, for adults, it's generally recommended to aim for around 1.5 to 2 hours of deep sleep per night. Deep sleep is crucial for physical and mental restoration, as it plays a vital role in memory consolidation, hormone regulation, and overall rejuvenation. Keep in mind that this is a general guideline, and individual sleep needs may vary. It's essential to focus on overall sleep quality and ensure you're getting enough restorative sleep each night. If you're consistently feeling tired or experiencing sleep disturbances, it may be helpful to consult with a healthcare professional.