Green tea extract:

• plucking
• rolling
• drying
• grading.

Black tea extract:

• plucking
• withering
• rolling
• fermenting
• drying
• grading.

White tea extract:

• plucking of young buds
• left drying in the sun
• rolling by hand.

Stevia extract.

Acerola extract.

Hibiscus extract.

Camomile extract.

And others.