Guayusa is a tea from Ecuador that's a sweeter tasting tea. It increases GLP-1 and fat oxidation. Huberman sometimes mixes it with Yerba Mate.
Some people who don't like mate might prefer something like guayusa, which is spelled G-U-A-Y-U-S-A. G-U-A-Y-U-S-A, guayusawhich is from Ecuador, despite the USA ending to it. It's from Ecuador. And it's a sweeter tasting tea.
""Huberman recommends guayusa as an alternative to yerba mate for increasing GLP-1 and fat oxidation, particularly for those who prefer a sweeter taste."