| | Measured quantity of intake of docosahexaenoic acid in 24 hours (observable entity) |  |  | Measured quantity of intake of docosahexaenoic acid in 24 hours |  |  | Measured quantity of intake of DHA (docosahexaenoic acid) in 24 hours
 |  |  | The known quantity of intake in one day of a polyunsaturated, omega 3 fatty acid with a 22-carbon chain and six cis double bonds. | 
 |  |