Theobromine and caffeine content of chocolate products
1980
Zoumas, Barry L. | Kreiser, Wesley R. | Martin, Robert A.
Theobromine and caffeine enters the diet in chocolate products. Theobromine and caffeine content of 22 samples of chocolate liquor, the starting material for chocolate products, averaged 1.22% and 0.21%, respectively, as analyzed by high performance liquid chromatography. Eight commercial cocoas contained an average of 1.89% theobromine and 0.21% caffeine. Theobromine and caffeine levels in 8 commercial sweet chocolates averaged 0.46% and 0.07%, respectively, and 0.15% and 0.02%, respectively, in 7 commercial milk chocolates. Analysis of 5 oz servings of 5 hot cocoa beverages and 8 oz servings of 4 brands of chocolate milk mixes indicated average levels of 65 and 58 mg theobromine, respectively, and 4 mg and 5 mg caffeine, respectively. Methylxanthine content varied widely in individual samples from each product category. For instance, the ratio of theobromine:caffeine in chocolate liquors ranged from 2.5:1-23.0:1. These values may be useful in planning diets for which the methylxanthine content is medically important.
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