Doctor’s Best L-Theanine with Suntheanine delivers 150 mg of pure L-Theanine per veggie capsule, using the clinically researched Suntheanine® form — a patented, high-purity L-Theanine produced through a proprietary enzymatic fermentation process that mirrors the natural process found in green tea leaves. Suntheanine® is one of the most thoroughly studied forms of L-Theanine available, making it a trusted choice for those seeking a premium-quality amino acid supplement.

L-Theanine is a naturally occurring amino acid found predominantly in tea leaves. Doctor’s Best has formulated this product with a clean, minimalist approach — free from GMOs, gluten, soy and animal-derived ingredients — making it suitable for vegans and vegetarians alike. Each capsule is made with a hypromellose (vegetarian) shell, ensuring the product is entirely plant-based from the inside out.

With 90 servings per container, Doctor’s Best L-Theanine with Suntheanine® offers a convenient, once-daily capsule format that fits easily into any lifestyle. As with all Doctor’s Best products, this supplement is produced to strict quality standards, providing a straightforward and reliable way to incorporate L-Theanine into your daily routine.