Acne occurs most often during puberty and affects adolescents and young adults, but it can occur at any stage of life. It can be caused by different factors (genetic predisposition, hormonal abnormalities, or immunological disorders) but it has also been observed a relation with lifestyle and diet: foods with a high glycemic load (for example bread, rice, pasta, and sweets) and dairy intake have been linked to acne, as well as emotional stress.
In adult women, it seems that some factors associated with acne are: a history of acne in parents or siblings, history of acne during adolescence, having no previous pregnancies, having hirsutism (excessive hair growing in places where it normally does just for men), being an office worker (in comparison with being unemployed or being a housewife), having a high level of psychological stress, a low weekly intake of fruits or vegetables, and low consumption of fresh fish (the main source of omega-3 fatty acids).
It is known that, in acne, the levels of EPA in blood serum are significantly low (as it was to be expected, because as we have stated before, it is a chronic inflammatory condition). This supports the use of omega-3 fatty acids as adjuvant treatment for acne.