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Are there dangerous additives lurking in your capsules?


As more people take charge of their own health, capsules have become a quick and effective way to consume vitamins and other nutritional supplements. Preferred over tablets for their faster dissolution rate, capsules can reduce stomach irritation and protect sensitive ingredients, allowing anyone to customize a mix that is tasteless, odorless and easy to swallow.

It’s not all that unusual to assume that when purchasing a supplement, you receive just that: the supplement in its pure, active form. While we wish this was true, a quick glance on the back of the average nutritional label tells a different story. Not familiar with Polyethylene Glycol or Titanium Dioxide? You’re not alone.


In today’s market, countless supplements are laden with artificial flavorings, dyes, fillers, anti-caking agents and binders. To save money and mass-produce their supplements, big manufacturers pump up their products with additives and chemicals. This reduces quality and potency, forcing the consumer to buy more product. Not only are many of these chemicals unregulated by the FDA—several can actually affect bodily absorption, compromising the active ingredient’s purity and bioavailability.

What are additives and fillers to look out for?


Magnesium Stearate

Magnesium Stearate is often included in mass-produced capsules to stop powder from caking and is estimated to be found in about 90% of vitamin supplements. Because the body’s digestive enzymes are forced to break down this agent first, the absorption of vital nutrients is delayed. Stearic Acid is also commonly sourced from hydrogenated cottonseed oil, which is believed to contain more pesticide residue than any other commercial oil. Unfortunately, there’s never any guarantee that supplements containing Magnesium Stearate are free of harmful contaminants.

Titanium Dioxide

Another additive frequently included in capsuled supplements is Titanium Dioxide, which is not found naturally in any food. Used as a colorant, this metal pigment contains nanomaterials, or ultrafine particles able to penetrate healthy cells. Studies are currently examining whether Titanium Dioxide is a carcinogen to humans, as excessive exposure has been linked to cancer, allergic reactions and immunotoxicity. Aside from supplements and food, it is also added to cosmetics and sunscreen.


There are currently no regulations on the amount of Silica allowed in supplements. It is often used in powdered foods and as insect repellent; long-term use has been connected to cases of respiratory and kidney damage.

Be assertive about your health

Always do your research and purchase capsuled supplements from trusted companies that believe in an unaltered, natural product. At the Bulksupplements manufacturing and distribution facility, we use manual and semi-auto filling processes for all of our capsules, ensuring that no additives, anti-caking agents or other chemicals compromise purity. Our gelatin and vegetarian capsules contain no preservatives or allergens and are non-GMO, promising simple and effective supplement delivery.

About the author

Casey Eade

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