I'm not the recipe developer, but I'd imagine you could sub unflavored gelatin and a sugar free powdered drink mix like Kool - aid or Crystal Light of you have access to that sort of thing. (motherthyme.com)
Starting at just $ 4 / serving, Kaeng Raeng Daily Green Energy is an all natural, organic green superfood + protein powder drink mix with probiotics and energizing B vitamins. (eatdrinkshrink.com)
Metamucil fiber powdered drink mixes come in a smooth texture — original and orange flavor — as well as in a coarse - milled texture, also in original and orange flavors. (livestrong.com)