Zest the lime. Finely zest the lime, taking only the green outer skin and avoiding the white pith underneath.
Mix the zest and sugar. Add the lime zest and sugar to a small saucepan. Stir together and let sit for a few minutes.
Add the water. Pour the water into the saucepan and stir to combine.
Add the lime juice and simmer. Add the fresh lime juice and bring the mixture to a gentle simmer. Cook until the sugar has completely dissolved, then remove from the heat and let cool before straining.
Notes
Use the nutrition card in this recipe as a guideline.