Caffeine can be in combination.Logical formLearned from4 sentences. Herbs may contain caffeine.Logical formLearned from4 sentences. Caffeine can be in beverages.Logical formLearned from4 sentences. A caffeine can be acute.Logical formLearned from4 sentences. Scientists may examine effects of (caffeine exposure).Logical formLearned from4 sentences. A (caffeine exposure) can be acute.Logical formLearned from4 sentences. A (caffeine metabolism) can be maternal.Logical formLearned from4 sentences. A caffeine may take effect.Logical formLearned from4 sentences. A caffeine can be in (energy drinks).Logical formLearned from4 sentences. Caffeine can be in a person.Logical formLearned from4 sentences. Caffeine may be used in combination.Logical formLearned from4 sentences. Persons may seek a caffeine.Logical formLearned from4 sentences. A person may have a (morning caffeine).Logical formLearned from4 sentences. Caffeine can be during a day.Logical formLearned from4 sentences. Caffeine may be found in chocolate.Logical formLearned from4 sentences.