Task: Text Completion
Input (English): [header] How to take cod liver oil for health [title] Read the labels. [step] Carefully review concentrations of vitamins and other ingredients in all supplements. Buy only supplements that abide by recognized manufacturing standards. <sep> (A) [substeps] Check ingredients contained in fish or poultry products of this species. Also read for ingredients from the u.s. (B) [substeps] Look for recommendations like safety reports, database labels, and additional information regarding safety and testing. Talk to your doctor, pharmacist, or registered health care provider regarding dietary supplements. (C) Search for a supplement that uses purified sources and can provide full detail about concentrations of mercury, heavy metals, and other potential contaminants. [substeps] Look for supplements that are endorsed or reviewed by the usp (us pharmacopeial convention)-this will be noted on the label. (D) Avoid supplements with fruit, vegetables, and certain spices. [title] Opt for foods high in folic acid.
Output (English): C