I use the normal TGel, on the days I do decide to use it. All of the TGel shampoos have the same active ingredient, Coal Tar. The main variations are that some of them are labeled 'Extra Strength' and I believe they may have either 3% or 5% Coal Tar as opposed to 2%. Since I am taking this as a preemptive anti-inflammatory and not for actual dandruff, I stick to the 2% of the normal TGel. I believe that there is another variation of it that contains Menthol? Menthol is a superficial additive, not an anti-inflammatory, but it might help soothe people who have itchy scalps because Menthol has a topical anesthetic effect. There is yet another shampoo in the same series, TSal. This is different than TGel, the active ingredient is not Coal Tar, but Salicilyc Acid which to my knowledge is an Alpha Hydrox and helps exfoliate and dissolve dead skin cells. I don't believe this is an anti-inflammatory, but for people with actual dandruff it helps control flaking.