That makes sense, but again, for anyone who has ever taken a chemistry class, creating a solution with a known osmolality is not difficult - basically all you need is a scale. But I also don't doubt that rando TikTok recipes are wildly dangerous.

And the age range argument doesn't really make sense if there were a standard recipe for "human breast milk replacement". I'm pretty sure human breast milk doesn't change composition as a child ages, and no one is arguing you can't breast feed toddlers because the milk is for the wrong age.