How much arsenic and menthol are in a cigarette?

No good data. Arsenic is a side effect of the type of soil the tobacco is grown in. This is not regulated. Menthol is an additive to improve the taste and encourage the use of the product. If these things concern you, then perhaps this is a terrific time to reconsider your tobaccom addiction and stop for good. Tobacco smoke is full of toxins, poisons and noxious material.