To find out what Hydrogenated Oils or fats are and do to you there are useful websites below.
http://www.healthandgoodness.com/nutritiondiet/HydrogenatedOil.htm
http://www.wisegeek.com/what-is-hydrogenated-oil.htm
http://en.wikipedia.org/wiki/Hydrogenation
http://www.weightlossresources.co.uk/diet/healthy_eating/hydrogenated_fat.htm