A new study gives a whole new meaning to the old adage, “you are what you eat.”

A group called “Clear Foods,” which analyzes foods “at a molecular level, ingredient by ingredient,” recently scrutinized 345 hot dog and sausage products from 75 brands and 10 retailers and claims to have found “human DNA in 2% of the samples, and in 2/3rds of the vegetarian samples,” NBC 12 reports.

Clear Foods did not speculate or identify how the human DNA could have wound up in the hot dogs, nor did it name the brands involved.

The group found of the hot dogs analyzed, 14.4% were “problematic in some way.”

According to “The Hot Dog Report”:

• Substitution: We encountered a surprising number of substitutions or unexpected ingredients. We found evidence of meats not found on labels, an absence of ingredients advertised on labels, and meat in some vegetarian products.
• We found evidence of chicken (in 10 samples), beef (in 4 samples), turkey (in 3 samples), and lamb (in 2 samples) in products that were not supposed to contain those ingredients.

Despite the shocking findings, Clear Foods identifies some manufacturers “large and small, that are producing high-quality hot dogs with integrity.”

Among national brands, Butterball, McCormick, Echrich and Hebrew National all scored a 96 on Clear Foods’ test. Among “specialty and regional” brands, Gardein scored a 95.

Winning the “best hot dog” category were Oscar Mayer Premium Jumbo Beef Franks, which Clear Foods says are “high quality and good value in a high-visibility brand.” The “best turkey sausage” was the Ball Park Smoked White Turkey Franks and the “best smoked sausage” was the Echrich Smoked Sausage Family Pack. Both scored a 98 on Clear Foods’ test.

The group reports the top three retailers were Target, Walmart and Safeway and found no correlation between price and quality.