12 million japanese take co-enzyme q10 for heart conditions. at age 67 must i take it if my heart is ok? do i take 30, 50, 60, or 100mg of ubiquinol?

No, it depends: Obviously you don't have to take coq10, esp. If your heart is ok. While i recommend coq10 for heart failure ; high blood pressure, it has other benefits ; is likely beneficial as an anti-aging agent ; may help prevent a variety of illnesses associated with aging. If you can readily afford it take 100 mg, otherwise 50 mg is ok. See http://www.Lef.Org/magazine/mag2006/feb2006_cover_coq10_01.Htm.