Every few weeks, I’ll get a sudden deluge of influencers on my For You Page talking about the same product. Sometimes, it’s Lenovo earbuds or a dupe of a Dyson stick vac. Most of the time, it’s skincare products. I’ve managed to resist most temptations thanks to a strict skincare budget — but for about a year, the algorithm won’t stop hounding me about one product: the Medicube Age-R Booster-H.

The Age-R Booster-H is a $330 skincare wand that claims to boost the efficacy of your…