Dark Chocolate and migraines, some thoughts
Posted in: Opinion
Lowe asked: "my current understanding is that there is some debate about whether or not cacao seeds actually even contain caffeine. Can you confirm that cacao seeds really do contain caffeine?"
Lowe, according to data collected by Minifie from multiple sources and tabulated on p.21 of "Chocolate, Cocoa, and Confectionery", cocoa nibs contain 0.07-0.7% caffeine. The same table puts the theobromine content of nibs at 0.8-1.4%
Also, Criollo beans have been found to contain more caffeine than Forastero beans (Kaspar, 2006). Furthermore, the theobromine/caffeine ratio has proved to be a clear indicator in differentiating Criollo and Forastero cocoas (INIAP, 2007).
This is interesting because it contradicts the common comparison of Criollo cocoa with Arabica coffee, and Forastero cocoa with Robusta coffee. (One of the characteristic differences between Arabica and Robusta coffees is that Arabica has about half as much caffeine than Robusta).
Hope this helps. You might also like to take a look at our database of scientific abstracts for more references:
http://chocolatereview.com.au/studies/index
References:
Kaspar (2006) "Identification and Quantification of Flavanols and Methylxanthines in Chocolates with Different Percentages of Chocolate Liquor"
Quote from the abstract:
"The Criollo genus resulted in a significantly greater caffeine content in dark chocolate when compared to a product prepared with similar weight percentages of chocolate liquor from the Forastero genus. Conversely, the Forastero genus produced a chocolate that was significantly greater in theobromine when compared to a Criollo product with similar weight percentages of chocolate liquor.
INIAP (2007) "Project to Establish the Physical, Chemical and Organoleptic Parameters to Differentiate between Fine and Bulk Cocoa - PROJECT COMPLETION REPORT"
Quote from the abstract:
"The results of the project clearly indicated that the physical parameters measured had proved to be inconclusive in differentiating fine from bulk cocoas. On the other hand, the theobromine/caffeine ratio had proved to be a clear indicator in differentiating fine cocoa from bulk cocoa."