Helps dissolve other soluble ingredients. Helps the mechanical process of cleaning teeth in mouthwashes.
Sodium carboxymethylcellulose is generally recognized as safe (GRAS) when used in accordance with good manufacturing practice in food for human consumption.
Fluoride-containing compounds, such as sodium fluoride or sodium monofluorophosphate are used in topical and systemic fluoride therapy for preventing tooth decay. They are used for water fluoridation and in many products associated with oral hygiene. Originally, sodium fluoride was used to fluoridate water; hexafluorosilicic acid (H2SiF6) and its salt sodium hexafluorosilicate (Na2SiF6) are more commonly used additives, especially in the United States. The fluoridation of water is known to prevent tooth decayand is considered by the U.S. Centers for Disease Control and Prevention as "one of 10 great public health achievements of the 20th century". In some countries where large, centralized water systems are uncommon, fluoride is delivered to the populace by fluoridating table salt. For the method of action for cavity prevention, see Fluoride therapy. Fluoridation of water has its critics (see Water fluoridation controversy).
Fluoride toxicity is a condition in which there are elevated levels of the fluoride ion in the body. Although fluoride is safe for dental health at low concentrations, sustained consumption of large amounts of soluble fluoride salts is dangerous. Referring to a common salt of fluoride, sodium fluoride (NaF), the lethal dose for most adult humans is estimated at 5 to 10 g (which is equivalent to 32 to 64 mg elemental fluoride/kg body weight). Ingestion of fluoride can produce gastrointestinal discomfort at doses at least 15 to 20 times lower (0.2–0.3 mg/kg or 10 to 15 mg for a 50 kg person) than lethal doses. Although it is helpful topically for dental health in low dosage, chronic ingestion of fluoride in large amounts interferes with bone formation. In this way, the most widespread examples of fluoride poisoning arise from consumption of ground water that is abnormally fluoride-rich.
Hydrated silica is listed by the US Food and Drug Administration as "Generally Recognized as Safe", however one drawback of abrasives in toothpaste is that they may make some people's teeth sensitive, especially if they brush very hard and do not brush with a soft-bristled toothbrush. The dentin and the pulp that lie beneath the enamel are sensitive, says the American Dental Association (ADA), so that why it's key to have a strong enamel.
Ingestion of microcrystalline hydroxyapatite (the form of calcium found in bone) produces less of an acute spike in blood calcium levels compared to soluble calcium salts typically used in standard supplements, and thus may be less likely to increase vascular calcification and coronary risk.
The Food and Drug Administration (FDA) regards SLS as safe as a food additive. Regarding its use in cosmetics and body products, the safety assessment study of SLS, published in 1983 in the International Journal of Toxicology (the most recent assessment), found that it’s not harmful if used briefly and rinsed from the skin, as with shampoos and soaps. The report says that products that stay on the skin longer shouldn’t exceed 1 percent concentration of SLS. However, the same assessment did suggest some possible, albeit minimal, risk to humans using SLS. For example, some tests found that continuous skin exposure to SLS could cause mild to moderate irritation in animals. Nevertheless, the assessment concluded that SLS is safe in formulations used in cosmetics and personal care products. Because many of these products are designed to be rinsed off after short applications, the risks are minimal. According to most research, SLS is an irritant but not a carcinogen. Studies have shown no link between the use of SLS and increased cancer risk. According to a 2015 study, SLS is safe for use in household cleaning products.
In the 1970s, studies performed on laboratory rats found an association between consumption of high doses of saccharin and the development of bladder cancer. However, further study determined that this effect was due to a mechanism that is not relevant to humans.Epidemiological studies have shown no evidence that saccharin is associated with bladder cancer in humans.The International Agency for Research on Cancer (IARC) originally classified saccharin in Group 2B ("possibly carcinogenic to humans") based on the rat studies, but downgraded it to Group 3 ("not classifiable as to the carcinogenicity to humans") upon review of the subsequent research. Saccharin has no food energy and no nutritional value. It is safe to consume for individuals with diabetes. People with sulfonamide allergies can experience allergic reactions to saccharin, as it is a sulfonamide derivative and can cross-react. Saccharin in toothpaste can cause burning sensations, swelling, and rashes of the mouth and lips in sensitive individuals.
Ingesting large amounts of sorbitol can lead to abdominal pain, flatulence, and mild to severe diarrhea. Habitual sorbitol consumption of over 20 grams (0.7 oz) per day as sugar-free gum has led to severe diarrhea, causing unintended weight loss or even requiring hospitalization. In early studies, a dose of 25g of sorbitol, eaten through the day, produced a laxative effect in only 5% of individuals. As a result of the large molecular weight of sorbitol, when large amounts of sorbitol are ingested, only a small amount of sorbitol is absorbed in the small intestine, and most of the sorbitol enters the colon, with consequent gastrointestinal effects.
Main Routes of Exposure: Inhalation; skin contact; eye contact. Inhalation: At high concentrations: can irritate the nose and throat.
Skin Contact: May cause mild irritation.
Eye Contact: May cause slight irritation as a "foreign object". Tearing, blinking and mild temporary pain may occur as particles are rinsed from the eye by tears.
Ingestion: Not harmful.
Effects of Long-Term (Chronic) Exposure: Conclusions cannot be drawn from the limited studies available.
Carcinogenicity: Possible carcinogen. May cause cancer based on animal information. Has been associated with: lung cancer.
Although tocopheryrl acetate is thought to be relatively safe, there are some potential risks, particularly if the recommended dosage is exceeded—the recommended dietary allowance is 15 milligrams (mg) or 22.4 internal units (IU). In fact, taking too much vitamin E could lead to toxicity.5
Because vitamin E is fat soluble, the body cannot get rid of excessive amounts in the urine. Some studies have shown an increase in mortality rate among people taking large doses of vitamin E, especially in people with multiple medical problems. Other possible side effects include breast tenderness, gonadal dysfunction, abdominal pain, blood pressure elevation, or diarrhea.
According to the Memorial Slone Kettering Cancer Center, symptoms of vitamin E toxicity from long-term use of more than 400–800 IU per day may include:
- Blurred vision
- Thrombophlebitis (an inflammation of the vein due to a blood clot)
Vitamin E supplements may also increase the risk of having a stroke. The reason tocopheryl acetate may increase the risk of a stroke is due to its anti-blood-clotting side effects.
Skin care products with tocopheryl acetate may cause a local skin reaction. Symptoms of an allergic reaction of the skin include reddening or a rash in the area that the cream or ointment was applied.
Trisodium phosphate side effects also include intestinal and stomach lining irritation, and lactic acid reduction in muscles. Side effects from trisodium phosphate poisoning via accidental ingestion or inhalation of the chemical include breathing difficulties, coughing, and throat pain and swelling.
When used as directed, zinc supplements can be a safe and effective way to increase your zinc intake and improve several aspects of your health. However, they have been associated with adverse side effects, including nausea, vomiting, diarrhea, and stomach pain Exceeding 40 mg per day of elemental zinc can cause flu-like symptoms, such as fever, coughing, headache, and fatigue . Zinc can also interfere with your body’s ability to absorb copper, potentially leading to a deficiency in this key mineral over time. Furthermore, zinc supplements have been shown to interfere with the absorption of certain antibiotics, reducing their effectiveness if taken at the same time. To reduce your risk of side effects, stick to the recommended dosage and avoid exceeding the tolerable upper limit of 40 mg per day — unless under medical supervision. If you experience any negative side effects after taking zinc supplements, decrease your dosage and consider consulting with your healthcare professional if symptoms persist.