Hi Dear Martha, Please go through the attached links which may be useful to you. Thanks

http://www.sciencedirect.com/science/article/pii/S0308814606003797

http://online.liebertpub.com/doi/abs/10.1089/109662000416285

http://link.springer.com/chapter/10.1007/978-88-470-2038-2_4

Phytate is non phosphorous, Theobromine is an alkaloid belonging to the methylxanthines. The structure of theobromine is similar to that of caffeine. Theobromine clearly has stimulant properties, so perhaps people reflexively.Theobromine is mainly found in cocoa beans (about 25 g/kg), and consequently in chocolate. Theobromine levels are highest in dark chocolates (about 10 g/kg). Milk chocolates contains about 2 to 5 g theobromine per kg. (1-5 g/kg). Theobromine is also present in tea and cola nuts. Although theobromine does not cause harmful effects with humans, it is highly toxic to some domestic animals, including dogs and horses. With the animals, theobromine can lead to cardiac arrhythmias and seizures.

Theobromine has a bitter flavour, which gives dark chocolate its typical bitter test.

There occurs an inverse relationship between theobromine and phytate. Relationship between mineral availabilities and dietary phytate is established in animals.Dietary phytate excrete as  faecal phytate and faecal mineral excretion. controlled high-phytate (HP) diet for 10 d; in MP2, phytate and mineral contents in diet and faeces are measured by inductively coupled plasma-atomic emission spectrometry.

Dear Ravi Kant Upadhyay

Thank you for yourresponse. Can I have a reference for the inverse relationship between phytate and theobromine? I would very much like to cite it as one of my references.

Thanks