Then, early last century, came the invention of Crisco, a lard look-alike made from cottonseed oil. Procter & Gamble advertised it as healthier — more digestible — than pig grease.

For example, safflower oil and sunflower oil have ratios of 125:1 and 91:1. Corn oil’s ratio is 50:1. Meanwhile, soybean oil and canola oil have lower ratios, at 8:1 and 2:1, respectively.