Concern and ingredient are the keywords
"Niacinamide serum for oily skin" beats your internal product name every time. Titles and keyword coverage should follow the problem language, not the brand language.
The claim is the risk
Anything implying treatment or cure is restricted — including in the reviews you display. Most beauty suspensions we see are about copy, not product.
Repeat rate justifies the first order
With real cohort data, a higher first-order CPA is defensible. Without it, you are guessing with budget.
More: the beauty vertical.