An everyday exampleहल्दी
How much curcumin is really in kitchen turmeric?
Turmeric powders average under 6% curcuminoids by dry weight, and the figure shifts with the variety and how it was grown. Standardised turmeric extracts used in research are made to contain 95%. Same plant. A very different, measured strength.
Turmeric is used here only as a familiar example.