Last summer, analysts at market research firm Spate said “bronzing” was a top growing benefit searched along skincare, and the trend continues to gain traction in the skincare market.   New from Physicians Formula is Butter Glow Bronzing Serum. Drawing inspiration from its Murumuru Butter Bronzer, the new serum is being marketed as “sun-kissed radiance” made with murumuru, cupuaçu and tucuma butters from the Amazon packed with essential fatty acids and pro-vitamins known to soften, condi...