Stevioside and rebaudioside A (reb A) are the most plentiful of these components.
These are extracted through a process of harvesting the leaves, then drying, water extraction, and purification. Crude stevia, the processed product before it is purified, often carries a bitter taste and foul smell until it is bleached or decolored. It takes roughly 40 steps to process the final stevia extract.
Stevia leaves contain stevioside in a range of concentrations up to around 18 percent.
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