The slowdown in the U.S. grocery market is becoming more pronounced as consumers put fewer items in their carts. New data indicates that overall grocery sales are declining, a sign that softer demand is now having a bigger effect on the sector.

A key shift is that weaker unit sales are outweighing the benefit retailers and brands had been getting from higher prices. Even if prices remain elevated, that support is fading as shoppers cut back on the number of products they buy compared with a year ago.

The trend is adding pressure across the food industry. Grocers and consumer brands are being pushed to compete more aggressively on price, promotions and value as households look for ways to manage spending. That can make it harder for companies to protect margins while still keeping customers from trading down or buying less.

For the broader retail and packaged food business, the data suggests consumers are becoming more selective in routine purchases. If shoppers continue to reduce the volume of groceries they buy, companies across the sector may face a tougher environment in the months ahead.