Kava-induced dermopathy: a niacin deficiency?

Area of Science:

• Dermatology
• Nutritional Science
• Pharmacology

Background:

• Kava (Piper methysticum) consumption is linked to pellagroid dermopathy.
• This skin condition has been historically attributed to niacin deficiency.

Purpose of the Study:

• To investigate the association between kava consumption and skin conditions.
• To determine if niacin deficiency is the cause of kava-associated dermopathy.

Main Methods:

• Interviewed and examined over 200 male kava drinkers in Tonga.
• Conducted a randomized controlled trial with 29 participants receiving nicotinamide or placebo.
• Assessed skin changes and eye irritation.

Main Results:

• A scaly rash resembling ichthyosis and eye irritation were observed in some heavy kava drinkers.
• Clinical improvement was observed in both the nicotinamide and placebo groups (5/15 vs. 5/14).
• Niacin deficiency was not identified as the cause of the rash.

Conclusions:

• The rash associated with heavy kava consumption is unlikely due to niacin deficiency.
• The skin condition appears to be more characteristic of an acquired ichthyosis.