This paper studies the effect of a minimum quality standard, a compulsory labeling scheme, and the combination of both instruments in a vertical differentiation model when not all quality dimensions can be observed by consumers. Both a minimum quality standard for the non-observable quality dimension and a labeling scheme that informs consumers about the non-observable quality dimension increase prices, and have no effect on the observable quality dimension and market shares. The combination of a minimum standard and a labeling scheme increases both the unobservable and the observable quality dimension, increases prices, and shifts market shares from the high quality firm to the low-quality firm. Social welfare is higher under the combination of both instruments than under no regulation, the minimum quality standard or labeling applied as only instrument.