A simple way to start: think about how many cigarettes you smoked per day.

• Heavy smoker (more than a pack a day): Start with 35-50 mg/mL nicotine salts. That's the range most former heavy smokers find satisfying.
• Moderate smoker (half to a pack a day): Try 12-20 mg/mL salts or 12-18 mg/mL freebase.
• Light or occasional smoker: Go low—3-6 mg/mL freebase. You don't need much to curb cravings.

These are starting points, not rules. Your body will tell you if you're off.