In the last couple of months Ive had the chance to talk to John Foster, an Iraq War veteran and he allowed me to share his story: http://bit.ly/2yX5ILR

John Foster, like many who have served our country, has dealt with the lasting effects of war, especially post-traumatic stress disorder (PTSD). The 38-year-old says a genetic test, ordered by his doctor, helped guide his treatment plan and allowed him to get better, faster.

The Orlando, Florida, resident was a combat medic and served two tours of duty in Iraq. He says the first tour, in 2004 and 2005, left him with no problemsor so he thought. It was during the second tour, in 2006 and 2007, when his issues developed. This is when the Army extended tours as a part of the troop surge. During Johns deployment, 11 members of his unit were killed in the deadliest year of the war on terror.

Fosters PTSD has required both inpatient and outpatient treatment. Through the years, hes dealt with the frustration of discovering that many psychiatric drugs dont work for him: at one point taking as many as 13 different medications a day.