Effects of a 24-hour fast on cigarette smoking in humans

Area of Science:

• Behavioral Science
• Psychopharmacology
• Addiction Research

Background:

• Understanding how physiological states like food deprivation affect smoking behavior is crucial for addiction research.
• Nicotine's effects on mood and the potential for altered smoke exposure warrant investigation in different metabolic conditions.

Purpose of the Study:

• To investigate the impact of 24-hour food deprivation on cigarette consumption, smoke exposure, and mood in research volunteers.
• To examine interactions between feeding state (fed vs. fasting) and nicotine yield (low vs. high) on smoking behavior and mood.

Main Methods:

• A within-subjects design with seven volunteers across four conditions: FED/LOW-YIELD, FED/HIGH-YIELD, FAST/LOW-YIELD, FAST/HIGH-YIELD.
• Cigarette consumption measured over 24 hours prior to sessions; laboratory sessions assessed puffs, cigarettes smoked, carbon monoxide (CO) exposure, and mood.
• Randomized block design used for experimental condition enactment.

Main Results:

• Food deprivation did not alter overall 24-hour cigarette consumption but led to slightly higher CO exposure before sessions.
• During laboratory sessions, smoking amount and CO exposure were similar between fed and fasting states.
• Significant interactions were found between feeding state and nicotine yield on mood, specifically sedation and arousal.

Conclusions:

• Fasting does not affect the quantity of cigarettes consumed but may increase smoke exposure during ad libitum smoking.
• Mood responses to nicotine are modulated by fasting, with higher nicotine yields leading to more sedation when fasting.
• Fasting may alter smoking behavior in unmeasured ways, potentially affecting puff volume or other parameters.