Marsden played a high school kid when he was 25, and he looked completely believable as a 17 year-old high school jock boy. Some people, due to genetic(the body can fight oxidative stress more effectively) hormonal(low levels of sex hormone gives the face a younger, more childish appearance) and lifestyle reasons(a diet low in fat decreases oxidative stress and colored vegetables are rich in antioxidants) age at a much slower pace than is customary. Marsden looks 29-33 in my opinion, meaning that his biological age is between 4 to 8 years lower than his chronological age. He looks great.

