How often does Mary Kay change products? Not often, according to the company! From Mary Kay’s online FAQ for customers :
Our core product lines are updated once every 3 to 5 years to take advantage of the latest innovations in skin care. And although we don’t do it often, we occasionally update our packaging to ensure that we continue to stay on trend and keep our presentation current and fresh. Remember that we’re in the fast-changing cosmetics business. Much like the automobile, fashion and consumer electronics industries, in the cosmetics industry, newness is what attracts customers to the brand.