What is the maximum amount of caffeine allowable before grounding flight personnel?

The maximum amount of caffeine allowable before grounding flight personnel is set at 450 mg. This guideline is in place to ensure that crew members remain alert and capable of performing their duties effectively during flight operations. Excessive caffeine consumption can lead to side effects such as increased heart rate, anxiety, and sleep disturbances, which could impair an individual's ability to operate an aircraft safely. Therefore, a threshold of 450 mg is established to balance the benefits of caffeine as a stimulant with the potential negative effects it may have on performance and safety. This limit reflects the understanding that moderation in caffeine intake can help maintain optimal alertness and cognitive function during critical flight missions.