There's no dedicated study measuring weight loss from this exact protocol, so there's no honest number to give. What determines your result is your overall calorie balance, not the drink by itself.
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Total calorie balance across your whole week matters far more than any single pre-meal habit. Two people using the exact same recipe can land in very different places depending on the rest of their diet.
Quick Take
Be skeptical of any specific weight-loss number attached to this trend. There isn't a study that actually measured it.
The Closest Real Numbers We Have
Studies on protein preloads in general, not this exact recipe, show people eat roughly 5-15% less at a meal when they take in protein beforehand. Applied loosely to the gelatin trick, that's the kind of modest, gradual effect that could realistically show up over weeks, not the dramatic transformations sometimes implied in viral videos. See our page on whether it actually works for the full mechanism.
How Trendmetric Reviews Viral Trends
We separate the base claim from the surrounding hype: what's biologically plausible, what's exaggerated, and what a longer explanation covers that a short clip can't.