Sleep Smarter: 21 Essential Strategies to Sleep Your Way to a Better Body, Better Health, and Bigger Success

by Shawn Stevenson

Tryptophan: This is a critical nutrient because it’s the precursor to your body’s serotonin production. Tryptophan is found in turkey, chicken, eggs, sweet potatoes, chia seeds, hemp seeds, bananas, pumpkin seeds, almonds, yogurt, and leafy greens.