Is kelp in toothpaste

Technically, yes. Algin- a thickening agent for pudding, ice cream, cough syrup, floor polish, and yes, toothpaste, is produced by algae from the Phylum Pheophyta, and kelp is the common species of Pheophyta. You are brushing your teeth with 2 types of algae. One- kelp, Two- diatoms- the common species of Phylum Chrystophyta, which has a cell wall made from Silicon Dioxide(Glass), and Diatoms, when dead, form Diatomaceous clay, which is a filtering agent and abrasive, and used in toothpaste.