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Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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DNA Testing
Preparation & Expectations
What is involved in preparation for the test?
No special preparation is needed for most DNA testing. If the sample will be collected by biopsy, special care must be taken to ensure a sterile specimen. If the sample will be collected from blood cells, the person cannot have had a recent blood transfusion.