Blessed thistle (Cnicus benedictus) has a long history in traditional herbalism. Its bitter compounds trigger digestive secretions, which can sharpen appetite and relieve occasional indigestion.
Nursing mothers sometimes take it to boost milk production. You can drink it as a tea, take a tincture, or swallow capsules.
Teas typically use 1 to 3 grams of dried herb per cup, sipped before meals to wake up the appetite. Since it raises stomach acid, people with ulcers or acid reflux should steer clear.