What are the ingredients in PQQ Lozenge sourced from? Education Team October 27, 2021 20:20 Updated Follow Ingredient Source PQQ Microbial fermentation Related articles Does PQQ Lozenge contain gluten or grains? What is the purpose of each ingredient in PQQ Lozenge? Are there any warnings or side effects when using PQQ Lozenge? How do I use PQQ Lozenge? Who is PQQ Lozenge intended for? Comments 0 comments Article is closed for comments.