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With the explosion of the direct consumer laboratory (DTC) sector, advocates have claimed that these tests remove potential barriers in our traditional healthcare system and increase access to important healthcare information while improving convenience. and privacy.

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Consumers now have access to a wide range of tests without a doctor's order, including sexually transmitted infections and allergy screening and assessments of cholesterol, vitamin D and nutritional deficiencies.

Genetic testing of DTC has received most of the attention from popular media and may be the most interesting for average consumers. The available tests range from identifying the origins of individuals and family relationships to the clarification of some genetic traits together with risk factors for well-being and genetic diseases.

Some genetic test results may be benign: "they probably won't like coriander." However, many DTC tests report variants for which there is little evidence to support association with a trait or health condition, such as polymorphism of the DCDC2 gene and reading ability.