This site's own "Stated Benefits" section lists eight specific claims — worth understanding the first, stronger hair from the roots, on its own.
This site describes it directly: Biotin is the ingredient most directly tied to this claim, supporting keratin production — worth reading this benefit as tied to one specific ingredient, not the formula broadly.
This site is direct at the top of this section: these are the brand's stated wellness goals, not independently verified medical outcomes, and individual results vary — worth reading every benefit on this list with that framing in mind.