The impact of light on cider. Does light pose a risk to hard cider? Beer is bottled in amber bottles to prevent what is called light struck or skunky beer. This occurs when photosensitive iso-alpha acids form 3-methyl-2-butane-1-thiol (MBT). MBT has a skunk odor. If hard cider includes hops, it can form this fault as … Continue reading Cider Words: Light Struck →