Is kava banned in the army?

Inquiring minds want to know, is the use of Kava prohibited within the confines of military service? Given the strict regulations and policies that govern the armed forces, it's crucial to understand if this particular substance falls under the category of banned items. Kava, being a traditional herbal beverage in certain cultures, might not seem like an obvious contender for prohibition, but in the military's eyes, even the slightest alteration in behavior or cognition could pose a threat to operational readiness and safety. So, to put it simply, is Kava consumption disallowed for those serving in the military?