Alleviates Anxiety and Stress. Tea contains an amino acid called L-theanine, which alleviates anxiety and stress, helping you relax. ... Helps Protect Against Cognitive Decline. ... Helps Support Bone Health. ... Improves Longevity. ... Lowers Cholesterol. ... May Enhance Memory. ... May Manage and Prevent Type 2 Diabetes. ... Might Lower Stroke Risk.