An artificial preservative that can become carcinogenic when mixed with Vitamin C.

An artificial preservative that builds up in the lungs, liver, and kidneys and has been linked to stomach tumors in animal studies.

A synthetic preservative that can cause asthmatic reactions and stomach irritation.

An artificial preservative that can become carcinogenic when mixed with Vitamin C in large amounts.

Preservatives that, when added in manufacturing, can induce asthma in sulfite-sensitive populations.

Manufacturing aids that allow more ingredients to be packed into a capsule. Stearates can inhibit the absorption of nutrients, and make supplements less bioavailable.

A mineral that is mined from underground. Talc carries the risk of being contaminated with Asbestos, because Asbestos is also found underground, and veins of it have frequently appeared in Talc deposits.

Genetically modified organisms.

A plasticizer used in plastic containers that mimics estrogen in the body and can disrupt thyroid hormones, causing infertility, miscarriage, erectile dysfunction. Also can adversely influence fetal development and increase cancer risk.

A coating used to make tablets easier to swallow, but is often contaminated with synthetic substances such as dioxane and ethylene oxide.

An artificial sweetener that has been linked to high blood sugar levels.

An artificial sweetener that has been linked to high blood sugar levels.

Artificial substance that can be used as a solvent, preservative, or sweetener. Can be toxic to the kidneys, liver, and nervous system.

An artificial sweetener that can cause allergic reactions.

An artificial sweetener that is associated with a decrease in important GI flora as well as bowel inflammation.

Sugar alcohols used as sweeteners that can cause diarrhea, gas, and bloating.

Artificial vanilla flavor. Synthetic vanillin is used in imitation vanilla flavoring and is usually manufactured from petrochemicals or genetically modified yeast. Synthetic Vanillin has been known to trigger allergic reactions, GI upset, or migraines.

A sweetener made from corn starch that has been linked to a fatty liver, obesity, diabetes, metabolic syndrome, and inflammation.

Among the eight most common allergens. Can cause allergic reactions and discomfort in some individuals.

Among the eight most common allergens. Can cause allergic reactions and discomfort in some individuals.

Among the eight most common allergens. Can cause allergic reactions and discomfort in some individuals.

Among the eight most common allergens. Can cause allergic reactions and discomfort in some individuals.

Among the eight most common allergens. Can cause allergic reactions and discomfort in some individuals.

A red dye made from insects, and can cause allergic reactions.

Artificial colors and dyes have in some cases been linked to illness and allergies. FD&C numbered color pigments also frequently contain aluminum.

A metallic colorant that has been classified by the International Agency for Research on Cancer as "possibly carcinogenic to humans".

Manufacturing aids that allow more ingredients to be packed into a capsule. Stearates can inhibit the absorption of nutrients, and make supplements less bioavailable.

A mineral that is mined from underground. Talc carries the risk of being contaminated with Asbestos, because Asbestos is also found underground, and veins of it have frequently appeared in talc deposits.

Genetically modified organisms.

A plasticizer used in plastic containers that mimics estrogen in the body and can disrupt thyroid hormones, causing infertility, miscarriage, erectile dysfunction. Also can adversely influence fetal development and increase cancer risk.

A coating used to make tablets easier to swallow. but is often contaminated with synthetic substances such as dioxane and ethylene oxide.

A nitrosamine impurity. NDMA is classified as a probable human carcinogen based on results from laboratory tests. NDMA is a known environmental contaminant and found in water and foods, including meats, dairy products, and vegetables.

Gelatin is often made from animal products.