The preliminary study investigates the impact of extracts from the blue-green algae Aphanizomenon flos-aquae (AFA) on human stem cell proliferation. The researchers found that while AFA extracts alone had moderate effects, combining an ethanol extract of AFA cellular concentrate with the nutraceutical formulation NT-020 significantly enhanced the proliferation of human bone marrow and CD34+ hematopoietic stem cells in culture.