Bitter Principle Standardization & Grades
Phyllanthus amarus Schumach. & Thonn. is a member of the leaf-flower family, and its bitterness comes from a mixed group of constituents: the lignans phyllanthin and hypophyllanthin, hydrolyzable tannins such as corilagin and geraniin, and flavonoids including rutin and quercetin glycosides. No single compound represents the whole bitter fraction, so the extract is standardized to bitter principles as a group, a figure that tells buyers how concentrated the extract is in the bitter-tasting material of the herb.
The grade is a single 3% level, so each lot is measured against the same target and the same procedure. A modest group figure suits a herb in which a wide range of polar and mid-polar compounds are extracted together, and it avoids implying a concentrated marker ingredient. The herb is also supplied as a 10:1 ratio extract without a marker figure, the Phyllanthus Amarus Extract Powder. Where a bitter fraction figure is wanted, this standardized grade is the one to order.
No milled herb or single-compound sibling of this species is currently listed in the catalog. The number is a group figure, and it should not be read as a figure for phyllanthin, hypophyllanthin or any tannin.
The aerial herb is the part used. Phyllanthus amarus is a small annual that is pulled up whole at flowering and cleaned of its roots. The leaves and the thin green stems carry the lignans and flavonoids, while the root carries very little, so a lot that includes root shows a lower bitter share. A Phyllanthus amarus extract is therefore defined by the species and by the aerial herb.












