A study done in United States of America by Koltun. W et. al.(2011) has found that a low dose combined oral contraceptive can reduce acne, and in some they were able to cure acne totally. The study was done using 893 healthy women with acne who took ethinylestradiol 20μg/drospirenone 3mg combined oral contraceptive. They were compared with 442 healthy women with acne who were given only a placebo. The Combined oral contraceptives (COC) and placebo pills were given for 6 cycles. The COC group had three times better acne reduction.
References:
Koltun W, Maloney JM, Marr J, and Kunz M. (2011). Treatment of moderate acne vulgaris using a combined oral contraceptive containing ethinylestradiol 20 μg plus drospirenone 3mg administered in a 24/4 regimen: a pooled analysis. Pubmed. [online] Available at: <http://www.ncbi.nlm.nih.gov/pubmed/21288628>[Accessed 9 February 2011]
References:
Koltun W, Maloney JM, Marr J, and Kunz M. (2011). Treatment of moderate acne vulgaris using a combined oral contraceptive containing ethinylestradiol 20 μg plus drospirenone 3mg administered in a 24/4 regimen: a pooled analysis. Pubmed. [online] Available at: <http://www.ncbi.nlm.nih.gov/pubmed/21288628>[Accessed 9 February 2011]
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