Effects of onion extract containing concentrated cysteine sulfoxides on sleep quality: a randomized, double-blind,...

Area of Science:

• Nutritional Science
• Sleep Medicine
• Biochemistry

Background:

• Sleep disturbances affect overall health and well-being.
• Cysteine sulfoxides are sulfur-containing compounds found in onions.
• Stress is a known contributor to poor sleep quality.

Purpose of the Study:

• To investigate the impact of onion extract with concentrated cysteine sulfoxides on sleep quality.
• To assess the effects of onion extract on sleep parameters and stress indicators.

Main Methods:

• A randomized, double-blind, placebo-controlled, crossover study design.
• Inclusion of 30 healthy adults experiencing sleep dissatisfaction.
• Administration of onion extract tablets or placebo for 5 days.

Main Results:

• Significant increases in delta power during non-rapid eye movement sleep and the first sleep cycle.
• Observed significant reduction in sleep latency.
• Demonstrated a significant decrease in salivary alpha-amylase levels, indicating reduced stress.

Conclusions:

• Onion extract containing concentrated cysteine sulfoxides effectively improves sleep quality.
• The extract demonstrates stress-alleviating properties, contributing to better sleep.
• It promotes a smoother transition into sleep, beneficial for individuals with sleep issues.