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A compound used in cosmetics in small quantities primarily as a pH adjuster.
Highly alkaline and potentially sensitising mineral used in cosmetics...
This naturally occurring alkaline compound poses a strong risk of sensitizing skin.
Controversial ingredient for skin because research has shown conflicting results. It seems to offer an initial benefit that improves skin firmness, but these results are short-lived and eventually give way to destruction of the substances in skin that help keep it firm.
Also known as lye, a highly alkaline ingredient used in small amounts in cosmetics.
Also known by the acronym HEPES, hydroxyethylpiperazine ethane sulfonic acid is a buffering ingredient typically used to establish a neutral pH in water-based solutions.
This inorganic salt is used in cosmetics to help increase a product’s viscosity.
Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.
Necessary to improve a formula's texture, stability, or penetration.
Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.
There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.
May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.
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We have not yet rated this ingredient because we have not had a chance to review the research on it.