Kiehl's and Kérastase are offering a free giveaway of their Elixir Ultime Hair Oil or either the Ultra Facial Cream or Retinol Skin-Renewing Daily Micro-Dose Serum, with up to 40,000 samples available. To claim your sample quickly as they are going fast, simply click on "GET FREEBIE," fill in your details and verify a mobile number through the provided link for dispatch of your chosen product that leaves skin softer or firms it visibly due to Retinol application with minimal discomfort within 29 subjects' instrumental study results.