Cigarette smoking and second-hand smoke both decrease vitamin levels and place them at higher risk of [vitamin and/or mineral] deficiency.

-Sharecare.com

Caffeine can cause nutrient depletion and interfere with nutrient absorption.

-Food and Science Quality Management

Alcohol Consumption can lead to conditions that prevent nutrient absorption.

-Sharecare.com

Results indicate that high doses of ascorbic acid administered orally, may ameliorate the withdrawal syndrome of heroin addicts.

-Clinical Trial: In Vivo

Certain foods help with withdrawal and can replace multi-vitamins.

-Sharecare.com