Maca comes from high in the Andes mountains of South America. It is, in fact, eh highest altitude crop in the entire world. The phytochemistry of the root is well understood and has many uses medicinally.
Ayahuasca is a blend of 2 Amazonian plants, brewed to produce one of the most psychoactive substances in the world. It's commonly used in the treatment of drug addiction, chronic depression, and anxiety disorders but has also seen a surge in global interest for non-medical reasons.
Heart palpitations can be very uncomfortable. Effective treatments are hard to find and often involve harsh pharmaceuticals (like beta-blockers) or surgically cauterizing the heart. There are, however, a few excellent herbal options you can employ for managing heart palpitations.