Wash the carrots, celery, parsley, and garlic under cold water.
Trim off the ends of the carrots and cut them into pieces that will fit into your juicer chute.
Cut the celery into 1-inch chunks.
Peel the garlic cloves.
Place the carrots, celery, parsley, and garlic into the juicer and run them through according to the manufacturer's instructions, extracting all the juice.
Optional: If desired, strain the juice through a fine-mesh strainer to remove any pulp and obtain a smoother consistency.
Pour the fresh carrot celery immune elixir juice into a glass and serve immediately.