| AA | arachidonic acid |
| AAS | atomic absorption spectrometry |
| AI | Adequate Intake |
| B-carotene | beta-carotene |
| BMI | body mass index |
| CI | confidence interval |
| CPBA | competitive protein-binding assay |
| d | day |
| DHA | docosahexaenoic acid |
| dL | deciliter |
| DRI | Dietary Reference Intake |
| EPA | eicosapentaenoic acid |
| ETA-AAS | electro thermal atomization-atomic absorption spectroscopy |
| FDA | U.S. Food and Drug Administration |
| FDA-CFSAN | FDA Center for Food Safety and Applied Nutrition |
| g | gram |
| GC-MS | gas chromatography–mass spectrometry |
| HHS | U.S. Department of Health and Human Services |
| HMD | Health and Medicine Division |
| HPLC | high-performance liquid chromatography |
| HPLC-EC | high-performance liquid chromatography-electrochemical detection |
| HPLC-FLD | high-performance liquid chromatography with fluorescence detection |
| hr | hour |
| ICAP-ES | inductively coupled argon plasma emission spectrometry |
| ICP-AES | inductively coupled plasma-atomic emission spectrometry |
| ICP-MS | inductively coupled plasma-mass spectrometry |
| ICP-OES | inductively coupled plasma-optical emission spectrometry |
| IQR | interquartile range |
| kg | kilogram |
| L | liter |
| LC-MS/MS | liquid chromatography-tandem mass spectrometry |
| LC-PUFA | long-chain polyunsaturated fatty acids |
| MC-ICP-MS | multicollector inductively coupled plasma mass spectrometry |
| mEq | milliequivalent |
| mg | milligram |
| mL | milliliter |
| mmol | millimole |
| mo | month |
| mol | mole |
| MS | mass spectrometry |
| MS/MS | tandem mass spectrometry |
| ng | nanogram |
| NP-HPLC | normal-phase high-performance liquid chromatography |
| NPN | nonprotein nitrogen |
| PI(E)COD | population, interventions (exposures), comparators, outcomes, and study designs |
| pmol | picomole |
| pp | postpartum |
| RCT | randomized, double-blind, placebo-controlled trial |
| RIA | radioimmunoassay |
| SD | standard deviation |
| SE | standard error |
| SEM | standard error of the mean |
| TE | alpha-tocopherol equivalents |
| UN-ICP-AES | ultrasonic nebulization-inductively coupled plasma atomic emission spectrometry |
| UV | ultraviolet |
| USDA | U.S. Department of Agriculture |
| USDA-ARS | USDA Agricultural Research Service |
| USDA SR Database | USDA National Nutrient Database for Standard Reference |
| WIC | Special Supplemental Nutrition Program for Women, Infants, and Children |
| wk | week |
| wt | weight |
| wt/wt | weight/weight |