For toddlers (1–2 years), this ingredient is not among the highest immediate risks, but there are animal and environmental reports showing concerns (hormone and nervous-system effects in animal studies, and that the chemical can stick around in the environment and build up in bodies). Because little long-term human data exists and young children have more skin exposure relative to their size, we recommend being cautious.
If possible, choose products for your 1–2 year old that do not list cyclopentasiloxane. If a product does contain it, prefer rinse-off items (like shampoos) over leave-on creams or lotions, avoid applying on broken skin or right near the mouth, use sparingly, and avoid daily long-duration use. Do a small patch test on a hidden area first and stop use if you see redness, swelling, or irritation.
Watch for skin irritation or any unusual behavior after repeated use. The warning comes from animal studies showing hormone and nervous-system effects (examples cited in the provided data include a 2005 inhalation cancer/tumor study and 2005–2007 reproductive/endocrine studies) and from environmental agency reports that flag persistence and bioaccumulation (Environment Canada; ECAH candidate listing). Also be aware of contamination concerns (related compound cyclotetrasiloxane was noted). If you are concerned, avoid the ingredient for toddlers and consult your pediatrician about products you plan to use regularly.
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This ingredient has the following documented risks:
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This ingredient may also be listed as:
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This ingredient is found in the following products:
This list shows products that contain Cyclopentasiloxane or its alternative names.
Scientific research related to this ingredient:
These research articles provide scientific evidence about Cyclopentasiloxane safety and effects.
Use caution with Cyclopentasiloxane for 1-2 year old toddlers. Some safety concerns have been identified.
May mess with natural hormone development in babies and children. Young children may be more sensitive to these effects.
Possible effects on early brain growth and mental development. Young children may be more sensitive to these effects.
May harm organs like liver, kidneys, or lungs with repeated use. Young children may be more sensitive to these effects.
Connected to cancer risk with long-term or repeated exposure. Young children may be more sensitive to these effects.
Builds up in the body over time with repeated use. Young children may be more sensitive to these effects.
Linked to long-term health effects after years of use or exposure. Young children may be more sensitive to these effects.
Can be absorbed through the skin and get into the bloodstream. Young children may be more sensitive to these effects.
Possible negative effects on the environment Young children may be more sensitive to these effects.
Some studies link this to future fertility or reproductive issues. Young children may be more sensitive to these effects.
Banned or heavily restricted in one or more countries. Young children may be more sensitive to these effects.
Detected in breast milk, meaning it can pass from mom to baby. Young children may be more sensitive to these effects.
Cyclopentasiloxane is commonly found in skincare products, cosmetics, and topical applications. Always check ingredient labels before use.
The appropriate age depends on the specific ingredient properties and concentration. This analysis is for 1-2 year old toddlers. Use the age selector above to check other ages.
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