The U.S. grocery slowdown is becoming harder to ignore.

Shoppers are buying fewer items than a year ago, and grocery sales are declining as weakening unit sales are now outweighing rising prices. That is according to new analysis from Bain & Company using NielsenIQ grocery data shared exclusively with CNBC.

Grocery units, which refer to individual items or products sold, fell 1.8% in June from a year earlier, a sharp reversal from the 0.1% year-over-year growth recorded in June 2025. While prices continue to rise about 2% to 3% year-over-year, that inflation cushion for the industry is no longer enough to keep overall sales growing.