Add all the ingredients into shaker with ice and shake.
Strain into a highball glass over fresh ice.
Top with the soda water.
Garnish with a grapefruit peel.
*Cinnamon syrup: Add 2 sticks Ceylon cinnamon (crumbled and toasted in a pan), 4 cups sugar and 2 cups water to large pan. Bring to a boil over medium-high heat. Remove from heat and cover. Let sit 20 minutes, then strain and chill.
**Turmeric tea: Add 1 tsp ground turmeric powder and 2 cups water to a medium pan, and bring to a boil over medium-high heat. Reduce heat and simmer for 10 minutes, then strain.