Andrographolide converts to a breakdown product as it ages, so laboratories measure the ratio of the two to judge a batch's true age.
From the full film, The Andrographis Paradox: Deconstructing a Botanical Ban: https://www.australian-pharmacognosy.org/videos/the-andrographis-paradox-deconstructing-a-botanical-ban/
Andrographis and the TGA review, in the Journal: https://www.australian-pharmacognosy.org/blog/andrographis-paniculata-anaphylaxis-tga-review/
If you want to use a herb, consult a degree-qualified herbalist with competencies and adequate training in pharmacognosy.
Prepared by the Department of Community Outreach, Australian Institute of Pharmacognosy, Cardwell, Queensland. Moment selection and copy: Jesse Kirby. Titling and channel fit: Zoe Bennett. Vertical layout and captions: Theo Karras.