What's a Filler?
These are ingredients meant to reduce the production cost and maximize profits, add bulk to the contents so it looks like you're getting more, or improve the appearance. In other words, nothing to do with nutrition (in fact, most do more harm than good) and everything to do with the manufacturer's bottom line.
Anti-caking/anti-clumping agent (talc is the more common name for magnesium silicate). Talc can contain asbestos and there are no requirements for it to undergo testing for asbestos contamination. Only talc-containing products labeled "USP" have been confirmed to be free of asbestos.
A "flow agent" that keeps ingredients from sticking together and delays breakdown and absorption of medications. Can irritate the mucosal lining of the bowels and cause diarrhea.
Anti-caking agent used to improve texture. Contains nanoparticles which have been linked to gastrointestinal issues such as leaky gut. When consumed long-term, linked to DNA and cell damage.
- Titanium dioxide/iron oxide/zinc oxide
Other common anti-caking agents, also used for texture, as zinc and iron supplements, or for color/appearance.
Contain nanoparticles which have been linked to gastrointestinal issues such as leaky gut. When consumed long-term, linked to DNA and cell damage. One study showed that just a single dose of zinc oxide nanoparticles could cause hepatic injury, kidney toxicity, and lung damage. A review found that iron oxide nanoparticles could cause biotoxicity from reactive oxygen species-induced oxidative stress.
Instead of fillers, our vitamins are carried in nutrient-dense, functional ingredients (like spirulina or MCT oil) for bonus benefits.