Based on the reference provided, chlorophyll water reportedly tastes like a mountain.
While the provided snippet doesn't give a detailed flavor profile, it suggests a fresh and possibly earthy taste. The speaker in the video implies that their mother, who drinks it, is very energetic ("she's a beast"), suggesting a perceived health benefit associated with the drink. Without further context, the "mountain" comparison is subjective but evokes a natural, clean, and potentially slightly mineral-like flavor.
