Please choose the correct ending to complete the given sentence: Health: [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.

Ending1: [substeps] Check ingredients contained in fish or poultry products of this species. Also read for ingredients from the u.s. Ending2: [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. Ending3: 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. Ending4: Avoid supplements with fruit, vegetables, and certain spices. [title] Opt for foods high in folic acid.

Answer format: ending1/ending2/ending3/ending4