Metamucil 4-in-1 fiber is a powder fiber supplement that uses plant-based psyllium fiber. Metamucil recommends mixing 1 or 2 teaspoons in at least 8 ounces of cold water and drinking with a meal up to three times a day. Metamucil shares that they are the No.1 doctor recommended brand and have been trusted by doctors for more than 80 years.
Metamucil explains that the supplement works by trapping and removing waste. Metamucil claims that their supplement can help with a variety of things including making you feel lighter, supporting healthy blood sugar levels, and lowering cholesterol. These claims are all based on self-reported data and very small studies.
Metamucil 4-in-1 fiber has mostly positive reviews. People thought it was the best tasting fiber they tried and it helped to keep them regular. Negative reviews thought the powder didn’t mix well and didn’t like the orange flavor.