There is no specific time for taking health supplement, including PetzUp^® Lingzhi Formula for Aging Dogs. In general, if you could not decide a time for feeding PetzUp^® Lingzhi Formula for Aging Dogs, we suggest fixing it on every morning as it is generally believe that it is a better time for absorption. But still, you could base on your feeding practice or your dog´s habit, such as feeding it with normal meal.