I don't think it is. If it was, then the shampoo particles would attack the conditioner particles soon after they were both put into the same bottle! When used separately, shampoo washes away conditioner, doesn't it? A soap particle (shampoo) turns an oil particle (conditioner) into something else. If they were together, the shampoo wouldn't quite be able to wash away the conditioner, but it would turn the whole solution into a murky mess incapable of performing any further actions. Now, as to what 2-in-1 shampoos really are, I haven't the faintest idea!!!