Aspidosperma is a category of flowering plants native to South America, Central America, southern Mexico, and the West Indies. “Aspidosperma q” stands for Aspidosperma quebracho-blanco, also known as kebrako or white quebracho, which is a specific type of aspidosperma plant species native to Brazil, North Argentina, Bolivia, Uruguay, and Paraguay. 

The bark and leaves of the Aspidosperma quebracho-blanco are sometimes used as medicine, particularly in homeopathic medicine. The 20 refers to the size of the 20 milliliter bottle that aspidosperma quebracho-blanco extract is sometimes sold in. There is not sufficient evidence to suggest that Aspidosperma quebracho-blanco is effective at treating any medical condition, including improving oxygen levels.

The bark and leaves of the Aspidosperma quebracho-blanco have been said to have properties that help with a range of health conditions, namely inflammation, respiratory problems, and erectile dysfunction. Aspidosperma quebracho-blanco is primarily used in homeopathic medicine, which believes that the body can cure itself using small amounts of natural substances like plants to stimulate the healing process.

However, science conducted on the medical benefits of Aspidosperma quebracho-blanco are limited, and the literature that does exist not does not suggest that Aspidosperma quebracho-blanco is an effective treatment for any medical condition. There are a very small number of studies in which Aspidosperma quebracho-blanco shows potential for medicinal purposes; for instance, one study found Aspidosperma quebracho-blanco leaves to exhibit mild analgesic (pain-killing) activity in mice. However, there are very few of these studies, and most of them have not been followed up on. 

Aspidosperma quebracho-blanco should not be seen as a treatment for abnormal oxygen levels, COVID-19, or any other medical condition.