Metamucil Cinnamon Spice Fiber Thins are delicious crunchy fiber snacks that provide 5 grams of fiber with just 100 calories per serving (4 g total fat). They help satisfy hunger and contain 15% of your daily recommended value of fiber to help promote digestive health. From Metamucil, the #1 Selling Fiber Brand^. HSA/FSA EligibleRestrictions apply; contact your insurance provider about plan allowances and requirements.