In a small, clean heatproof container, combine the sucrose (11 g) and glucose/dextrose (11 g) with 40–60 ml of warm (not boiling) water to help dissolve. Stir until fully dissolved and the syrup is clear. Let cool to room temperature.

Mix active ingredients

In a separate small container, measure taurine (1000 mg), glucuronolactone (600 mg), and caffeine (80 mg). Add the powders (or liquid concentrates) to the cooled syrup and stir until fully incorporated. If using powdered ingredients, ensure they are food-grade and accurately weighed on a milligram scale.

Add acid and buffering agents

Add citric acid (0.4 g) and sodium citrate (0.3 g) to the syrup mixture and stir until dissolved. These provide the tartness and buffering typical of energy drinks.

Add flavor and optional additives

Stir in the natural/artificial flavor blend (1 ml). If using potassium sorbate (50 mg) and caramel color (0.2 ml), add them now and mix thoroughly. Taste a very small sample (a few drops) to adjust flavoring if needed — do not consume large quantities of raw concentrated mixtures.

Finish Drink

Chill a 250 ml glass. Fill the glass with 4 ice cubes (if desired). Pour the 40–80 ml of the prepared concentrate into the glass (this concentrate should be already diluted to a palatable sweetness and acidity).

Slowly add 250 ml of chilled carbonated water to the concentrate while stirring gently with a bar spoon to integrate without losing too much fizz. The final volume should be roughly 250–300 ml depending on concentrate used; adjust to taste for sweetness and strength by adding more carbonated water or concentrate.

Give the drink a gentle stir, taste for balance. If too sweet, add a splash more carbonated water; if too tart, add a pinch more sugar dissolved in a little water; if too weak, add a few more milligrams of caffeine/taurine only within safe and legal limits.

Garnish with an optional lemon wedge on the rim. Serve immediately while cold and fizzy.