PUREXA JOURNAL

The botanical world,
in focus.

Research worth reading. Developments worth understanding. Stories that bring botanical tea into focus.

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FEATURED RESEARCH

Soursop, seen
in finer detail.

Researchers compared three Annona species, including soursop. Their findings show why the plant part and preparation matter.

Read the story

Research summary

Source study: February 2026 issue; first online 10 December 2025.

IN BRIEF / QUALITY & STANDARDS

SOURCE CHECKED

Organic standards:
what is on the agenda?

The USDA National Organic Standards Board is scheduled to meet virtually on 27-29 October 2026. The published fall proposals include a review of residue-testing rules.

A proposal is a discussion point, not a new rule.

View the USDA proposal materialsSee the meeting details

FROM THE ARCHIVE

Stay curious.

The colour of butterfly pea

Explore the chemistry behind a colour-changing cup.

Read the guide
Browse Botanical Insights