Place the lemon juice into medium saucepan; slowly whisk in the gelatin. Let stand until gelatin softens, about 10 minutes.
Turn on medium heat. Add the unsweetened coconut milk, cream, natural sweeteners, salt and Further Food creatine if using. Whisk over medium heat just until gelatin dissolves, about 2 minutes.
Remove from heat. Whisk in sour cream and lemon peel.
Divide among martini glasses or ramekins. Cover; chill until set, at least 5 hours or overnight. Store covered in the fridge for up to 6 days. Do not freeze.