Bitter 87% is the highest cocoa-content chocolate in the Kalev product range. The product has the best qualities of a dark chocolate and is loved by especially by the people who prefer less sweet and more bitter chocolate. Scientists have discovered that dark chocolate has several health benefits. Among other things, chocolate contains substances that help to prevent several illnesses (such as cardio-vascular diseases) and on the other hand generate a feeling of wellbeing and satisfaction with oneself and the world, boost mood and alleviate stress. Dark chocolate is also known to energise and it contains a lot of energy, which is great for anyone who have to deal with mental or physical efforts. Recommended daily enjoyment quantity is two to three pieces of dark chocolate.