Check the ingredient list: If the top billing is given to grape juice concentrate, that means it is more grape than grapefruit. Is it 100% juice? Some labels tout 100% juice, but additives such as dyes and preservatives make that misleading. Is there proof of pulp? Actual grapefruit offers 18% of your daily fiber needs. Many fruit drinks have zero fiber. Confirm the vitamin C One serving satisfies a day’s worth of vitamin C, powering up your immune system. Inspect the color The color in many bottled drinks doesn’t come from fresh fruit but, rather, a dye made from beetles.   The bottom line: Go for fresh squeezed–or eat the whole fruit. A ruby red grapefruit contains cholesterol-lowering pectin, cancer-fighting lycopene, and just 17 g of sugar. Plus, the fruit’s natural fiber will keep you feeling full for hours. Refreshing (and Low-Cal) Summer Drinks 5 Ways to Spot a Healthy Food