For newborns and babies up to 6 months, this silicone ingredient should be treated with caution. Baby skin soaks up more of what you put on it, and there are animal studies and government reviews raising concerns about hormone effects, contamination, and how long the chemical persists in the environment.
Try to avoid products that list cyclopentasiloxane (or related names like some cyclomethicones) on the label for babies under 6 months. Prefer very simple, fragrance-free formulations made for newborns. Don’t use it on broken skin or around the mouth and nose. If you can’t avoid it, use it sparingly, rinse it off after a short time, and stop use if you see any redness, swelling, or irritation. Talk with your pediatrician if you’re unsure.
Watch for skin redness, irritation, or any new rashes after use — these are immediate signs to stop. The caution comes from animal studies showing hormone and reproductive effects and some neuro and long-term tumor findings, plus government reviews that flagged contamination and that the chemical builds up in wildlife. Because infants absorb more through their skin and their detox systems are still developing, these concerns are more important for newborns and young babies.
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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.
Cyclopentasiloxane is not recommended for 0-6 month old babies due to potential safety risks.
May mess with natural hormone development in babies and children. This is especially important for babies whose skin and systems are still developing.
Possible effects on early brain growth and mental development. This is especially important for babies whose skin and systems are still developing.
May harm organs like liver, kidneys, or lungs with repeated use. This is especially important for babies whose skin and systems are still developing.
Connected to cancer risk with long-term or repeated exposure. This is especially important for babies whose skin and systems are still developing.
Builds up in the body over time with repeated use. This is especially important for babies whose skin and systems are still developing.
Linked to long-term health effects after years of use or exposure. This is especially important for babies whose skin and systems are still developing.
Can be absorbed through the skin and get into the bloodstream. This is especially important for babies whose skin and systems are still developing.
Possible negative effects on the environment This is especially important for babies whose skin and systems are still developing.
Some studies link this to future fertility or reproductive issues. This is especially important for babies whose skin and systems are still developing.
Banned or heavily restricted in one or more countries. This is especially important for babies whose skin and systems are still developing.
Detected in breast milk, meaning it can pass from mom to baby. This is especially important for babies whose skin and systems are still developing.
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 0-6 month old babies. Use the age selector above to check other ages.
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