Life in Hong Kong is fast-paced and stressful, making "not getting enough sleep" a common reality for most office workers and students. Many people suffer from insomnia, tossing and turning in bed each night. Gastroenterologist Dr. Siu Wai-shing points out that sometimes poor sleep quality isn't about needing sleeping pills, but about a specific nutrient your body is missing after dinner. A moderate supplement of natural sleep-promoting foods after your evening meal can effectively help your brain "shut down" peacefully.