Rene furterer rf 80 concentrated serum sudden thinning hair most commonly affects women and can be triggered by various factors such as pregnancy stress an unbalanced diet or medication rf 80 has a double patented and scientifically proven formula that combats the two major factors of sudden thinning hair vascular and nutritional it works against these 2 causes to naturally encourage the growth of stronger hair and improve hair structure for thicker and faster growing hair natural pfaffi