Suntheanine L-Theanine gives a calm, focused clarity through the patented Suntheanine form, helping you unwind while staying alert even on busy days. The key active ingredient Suntheanine helps relaxation without heaviness, and Doctor's Best backs this with science-based nutrition and a pledge to clear ingredient quality. That means steady everyday support for focus and calm.

Available Sizes & Variants:

90 capsules L-Theanine supplement - everyday daily supply for ongoing support

Benefits & Features:

• Promotes relaxed focus without feeling drowsy.
• Supports calm alertness during demanding tasks by helping balance mood and tension, so you can stay productive without the jitters that come with stress.
• Key active ingredient Suntheanine provides a purified, branded form of L-theanine.
• Manufactured as non-GMO, vegan, gluten-free and soy-free to suit most diets.
• Simple daily capsule fits easily into a busy routine without heavy effects.

Doctor’s Best champions Science-Based Nutrition, delivering quality you can feel. Suntheanine is the premier, patented form of L-theanine, produced by a trusted fermentation process that mirrors the natural compound in green tea. The result is a pure, predictable relaxation that supports calm focus without heaviness. Research suggests L-theanine can help ease everyday stress and sharpen attention, with alpha brain waves rising as a sign of relaxed alertness. The brand’s transparency and vegan, non-GMO approach underline a level of quality that stands out in l theanine supplements.