Though the research team used cocoa powder for its experiments, the best way to take advantage of the health benefits of chocolate is to consume cacao, and preferably raw cacao. Many cocoa powders and chocolate products contain cocoa that has been treated with alkali, an agent that reduces its antioxidant potential. Many conventional chocolate products are also loaded with processed sugars and genetically modified (GM) soy lecithin, which can cause other health problems.
The recommended limit of caffeine during pregnancy is 200 milligrams (mg) a day. So with a typical soda containing 35 to 55 mg of caffeine, it's wise to limit yourself accordingly, and take into account other sources of caffeine in your diet, such as coffee, tea, and energy drinks.
( Please refer to the article on fluorides in tea ) The pregnant woman, who should avoid excessive caffeine to prevent the baby from underweight, should keep a maximum of 6 x 220 ml cups, or about 9 x 150 ml cups. That is to say she is not excessive in chocolate, cola drinks, energy drinks etc, and avoid coffee.