What are the ingredients in PQQ Lozenge sourced from? Ceylon Keeslar 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? How do I use PQQ Lozenge? Are there any warnings or side effects when using PQQ Lozenge? Who is PQQ Lozenge intended for? Comments 0 comments Article is closed for comments.