Dr. Oz’s vegan challenge was a success for Rocco Wachman. On his daytime talk show, Dr. Mehmet Oz challenged the 50-something cowboy to a four-week plant-based diet designed to treat his obesity, heart disease, and diabetes. Wachman says the first seven days were difficult, when he switched from eating meat at every meal to eating seven small meals per day of fruits, vegetables, nuts, and soy protein. Eventually, he got used to the new food. He lost 30 pounds, lowered his blood sugar, and stopped taking two of his three medications. Wachman says he ate meat after his diet ended, but found it unfulfilling and will avoid it.