High dose: 500 mg plant-based L-tryptophan / capsule Naturally extracted from fermented corn seeds Precursor of melatonin, used to regulate the sleep-wake cycle Precursor of the happiness hormone serotonin Made in Germany without additives 100% vegan Our Valeo Vita tryptophan capsules are produced following the model of natural plant biosynthesis. We use corn seeds that are cultivated with sugar and minerals, then fermented and crystallized. The seed cells are then washed, freeze-crystallized, and dried. The resulting L-tryptophan is characterized not only by high bioavailability but also by its high purity and naturalness. Our Valeo Vita capsules are vegan and GMO-free.