Get a FREE Brandefy 15% Vitamin C + E Ferulic Acid Serum Sample. Dull skin has met its match with this anti-aging antioxidant serum that combines a stable form of 15% pure vitamin C, 0.5% ferulic acid, and vitamin E to provide environmental protection and help reduce the appearance of fine lines, wrinkles and discoloration. In order to get this freebie, you need to click on the “Get FREE” button. If you don’t see the post show up after checking their page, the first thing you’ll want to do is head on over, follow their Facebook page, follow them on Instagram, and then like their posts. Next search for brand and product name on Google and scroll a page or two. You could also visit their website. The ad with the free offer may pop up on your newsfeed at once or in the days to follow. Please note: You may still not get this offer on your newsfeed even if you have done all of the above. US only.