Ayahuasca Lyophilization (Freeze-drying) Protocol with Pre- and Post-procedure Alkaloids Quantification.

Ayahuasca is a psychoactive brew from the decoction of different Amazonian plants, traditionally used in several cultures, religions, and rituals. Scientific studies with ayahuasca are rapidly increasing due to its subjective effects and therapeutic potential. Although ayahuasca is traditionally used in its liquid presentation, lyophilized (freeze-dried) ayahuasca is often used in scientific experimentation settings. However, there is no standard process or guideline to freeze-dry ayahuasca nor comparison of the chemical profile between the liquid and freeze-dried presentations. Therefore, we describe a reproducible five-day protocol for ayahuasca lyophilization with alkaloids quantification by liquid chromatography coupled to tandem mass spectrometry of both the liquid and the final freeze-dried ayahuasca. By the end of the protocol, approximately 295 g of freeze-dried extract with similar alkaloids concentration were obtained from two liters of ayahuasca (dry matter: 14.75 %). The final extract was stored for three years inside a vacuum desiccator (approximately 6°C) with its texture quality preserved. Further studies should address the impact of different storage conditions and the lyophilization on the alkaloids' quantity of the freeze-dried ayahuasca, especially the use of heat in regards to the β-carbolines.