Loyal 是一种首个抗衰老药物，已进入美国针对老年犬的临床试验。 Loyal, a first-of-its-kind anti-aging drug, enters U.S. clinical trial for senior dogs.

一种名为 Loyal 的开创性抗衰老药物已经达到了一个重要的里程碑，美国的老年犬现在正在通过服用该药参与一项临床试验。 A pioneering anti-aging drug called Loyal has reached an important milestone, as senior dogs in the U.S. are now participating in a clinical trial by taking the pill. 该药物旨在延长狗的寿命，并且是同类药物中的第一个。 The drug is designed to extend the life of dogs and is the first of its kind.