"Chocolate is poisonous for dogs, as it contains theobromine and caffeine, two stimulants that dogs cannot efficiently metabolise, so ingesting even a small amount can make them quite unwell.

Source: https://www.dailypost.co.uk/news/uk-world-news/april-warning-dog-owners-millions-26606818

PreSeries LEAN also contains a moderate dose of caffeine, theobromine, and Infinergy™ dicaffeine malate to provide a longer-lasting increase in mental performance and thermogenesis (fat-burning) without the crash.

Source: https://www.healthcanal.com/life-style-fitness/exercise/best-pre-workouts-women