Whole fruits and vegetables are essential for good skin health. Please discuss any supplements with your health professional to in fact determine if required. This is so very important with teenage acne. Improving the diet and overall gut health is an important part of managing difficult skin conditions.
Here is a link to a chart created by the Queensland Government about seasonal fruits and vegetables and their benefits.
http://www.healthier.qld.gov.au/wp-content/uploads/2015/09/QH_O41832_T_Seasonal_Calendar_A4_2PP_23092015.pdf