In a medium saucepan, whisk the protein powder into the fruit juice until smooth.
Sprinkle the gelatin evenly over the mixture and let it sit for 3 minutes to bloom.
Place the saucepan over low heat, stirring continuously, until it is fully dissolved and smooth. Do not boil.
Carefully pour into silicone molds using a dropper or spouted cup.
Refrigerate for at least 2–3 hours, or until fully set.
Remove from molds and enjoy.