we harvest some wild and also order turkey tail from trusted vendors wild harvested in the United States. The vegetable glycerin tinctures are an alcohol free, and have a sweet earthy mushroom taste. They are easy to consume straight or can be mixed into drinks or added to food. we use ultrasonic extraction to process the mushrooms and we make them very potent at a 1 to 4 ratio mushrooms to vegetable glycerin 25mg per ml.