
1) Brand of fiber powder
Found on
https://www.crosswordclues.com/clue/metamucil

Metamucil is a bulk-producing laxative and fiber supplement. The Metamucil brand has existed since 1934, and was owned by G. D. Searle & Company until 1985 when Procter & Gamble acquired the brand. The active ingredient is psyllium seed husks. It may also reduce cholesterol when taken daily. Metamucil is sold in powdered drink mixes, capsules, and...
Found on
http://en.wikipedia.org/wiki/Metamucil

(met″ә-mu´sil) trademark for preparations of psyllium hydrophilic mucilloid, a bulk laxative.
Found on
http://www.encyclo.co.uk/local/21001
No exact match found.