In today's retail marketplace, consumers receive little or no consistent brand‐level sustainability information, but this may change in the near future. Developing hypotheses based on the comparative brand processing and information disclosure literatures, we conduct a retail laboratory choice‐based experiment to test predictions related to the effects of brand‐level sustainability information on choices, product evaluations, and retailer perceptions. Compared to the status quo condition in which no sustainability information is provided for the product category at the retail point of purchase, the addition of positive (negative) sustainability information for the brand yields higher (lower) product evaluations and increased (decreased) brand choice. In addition, due to greenwashing concerns, many consumers may be skeptical of product‐level sustainability information, and we address the moderating role of this skepticism on retailer‐related perceptions.