Stevia shows up in almost everything marketed as "clean." Zero calorie, plant-derived, the sweetener wellness brands reach for when they want to avoid sugar and synthetic sweeteners at the same time. So when people notice it's missing from every single Bestie formula, they usually assume it's an oversight. It's not. It's a line we drew on purpose, and it's worth explaining why.
Stevia has been shown in research to carry weak phytoestrogen-like activity, meaning it can behave a little like estrogen in the body, along with potential interference with progesterone receptors documented in animal studies. Weak doesn't mean nothing. For a brand built specifically around women's hormone health, cycle support, and formulas meant to be taken daily, "weak but real" isn't a risk worth signing up for, especially when the only upside is avoiding a few grams of sugar or a handful of calories.
This is the kind of tradeoff most brands never have to think about, because most brands aren't building specifically for the female endocrine system. We are. So when an ingredient carries even a directional signal of hormone interference, it's out, no matter how popular it is or how many boxes it checks on a clean-label scorecard.
This isn't a one-off decision buried in a single product's formulation notes. It's a standing rule across the entire line, Hey Ladies, Stacked Protein, Burn Baby Burn, Vibe Check, Brain Flex, all of it. Every product gets sweetened and flavored without stevia, without synthetic sweeteners, and without anything that asks your hormones to gamble on "probably fine."
Where does the sweetness actually come from instead? Real food. Monk fruit in some formulas, natural fruit and flavor sourcing in others, always something your body already recognizes as food. That's the whole philosophy behind Flavored by Nature: if we wouldn't put it on your plate, we're not putting it in your formula, and that includes ingredients with even a theoretical hormonal question mark attached.
You shouldn't have to read animal studies to know what's in your supplement. That's our job. We just think you deserve to know we actually did it.