Putting it in meals reduces triglyceride levels in the blood by 30%.   Spices and herbs are rich in antioxidants, which may help reduce levels of triglycerides and other fats in the blood, according to a study by researchers from the University of Pennsylvania.   Triglyceride levels usually rise after eating high-fat diets, leading to an increased risk of heart disease. The researchers said that if spices containing higher amounts of antioxidants were mixed with a meal, triglyceride levels would decrease by 30 percent compared to the same meal without those spices.     * Healthy spices     *…