Bottom line statement: Herbal and dietary supplements can use can result in sudden incapacitation. Which option conveys a prudent practice?

• A. Use regularly to maintain energy
• B. Avoid use before and during flight
• C. Use only if tested in flight simulators
• D. Use only after the flight

Answer: (B)

Herbal and dietary supplements can have unpredictable effects, and some can cause sudden impairments in alertness, coordination, or judgment. In aviation, any factor that could compromise performance before or during flight poses a safety risk, so the safest practice is to avoid using these substances in the period surrounding flight.

This is why avoiding use before and during flight is the best choice. Using them regularly to boost energy can introduce variable effects, dosing issues, or interactions that aren’t reliably controlled. The idea that supplements could be “tested in flight simulators” isn’t a valid safety standard for ensuring real-world performance, and using them only after the flight misses the critical window where impairment could occur during the mission. Similarly, using them only after the flight still leaves the flight period vulnerable to sudden incapacitation if symptoms appear earlier.

So, the prudent approach is to refrain from herbal and dietary supplements before and during flight to maintain consistent, unimpaired performance.