Our farm · Sourcing
We chose the cultivar, then grew it ourselves.
Every product on this store starts with one selected line of White Kwao Krua, bred for high isoflavone content and grown on St.Herb’s own plantation using organic farming methods.
The cultivar
Years of selection for one thing: isoflavones
Pueraria mirifica varies a lot from plant to plant. Wild roots can differ widely in their phytoestrogen content, which makes a consistent product hard to build.
So St.Herb spent many years selecting a cultivar richest in isoflavones, the phytoestrogens researchers find most interesting in this plant. That single line is what we plant, harvest and extract.
Growing our own raw material on a large site means we don’t depend on whatever root is available on the market that season.
Our plantation philosophy
The 5G standard, from soil to finished product
Our selected cultivar is processed under five “Good Practice” principles. Each one covers a stage where quality is usually lost.
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Good Agricultural Practice
GAP · Growing
Our own large plantation supplies our raw material, farmed on organic principles.
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Good Harvesting Practice
GHP · Harvest
Roots are lifted only at the right time, so the raw material is at its best.
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Good Laboratory Practice
GLP · Testing
Raw material and finished products are analysed against a standard before release.
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Good Clinical Practice
GCP · Research
Products are clinically tested on an ongoing basis, with medical research partners abroad.
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Good Manufacturing Practice
GMP · Production
Every product is made in GMP-certified factories.
Why the farm matters
What the root is studied for
Phytoestrogens, especially isoflavones, are the reason people take Pueraria mirifica. Taken at the right dose, they are researched for support in these areas.
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Female characteristics
Especially for women with low natural estrogen, including during menopause.
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Breast and skin appearance
The main reason most people choose our serums, creams and capsules.
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Bone structure
Studied alongside estrogen’s role in bone density.
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Cardiovascular health
Part of the wider research on phytoestrogens.
These statements have not been evaluated as medical claims. Read routine & safety before starting, and speak to your doctor if you are pregnant, breastfeeding or have a hormone-sensitive condition.
From one farm
Made into our full range, shipped worldwide
Some of the markets we ship to:
- Thailand
- Japan
- China
- Europe
- USA
- and more
Every product starts on this farm
Browse products made from our own cultivar, or ask a specialist about sourcing and lab results.