The peel of gin and tonic’s traditional garnish lends bright notes to tonic infusions.

Tonics flavored with lemon juice and peel can balance sweeter gins and added liqueurs.

With its bright, floral, and bitter notes, the peel adds complexity to tonic.

The leaves of this Southeast Asian plant provide a strong flowery citrus bouquet.

Historically added to tonics for its digestive benefits, the warm, sweet spice balances bitterness.

This fragrant Chinese spice suffuses a tonic with a liquorice-like scent.

Sold as a powder, this fruit-based acid boosts tonic’s tang and acts as a preservative.

Lemongrass

The dried root of a type of iris, this powder smells of violets with a taste akin to raspberries.

A spice used in Bombay Sapphire gin, this can add floral pepperiness to tonic.