Vitacost-Synergy Bioavailable Folate Featuring Quatrefolic NEW! Skip synthetic folic acid—supplement with a better form of this essential B vitamin with Vitacost Bioavailable Folate with Quatrefolic®. What is Bioavailable Folate? Folate named after the Latin word for leaf (folium) is a B vitamin found in leafy green vegetables citrus fruits beans and peas. It’s not produced or stored by the body and must be regularly replenished through diet. When supplementing with folate most people take folic acid—which is a synthetic form of folate. In the body folic acid must be metabolized to its bioactive form before it can be used—and only a small percentage is believed to actually make it into the body’s cells. Now Bioavailable Folate offers a better way to obtain folate. It features Quatrefolic® a scientifically advanced active form of folate that’s complexed with glucosamine for better solubility and bioavailabilty than other available forms.