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Does Infusium weaken hair?

Berlina beckons…I had recently been using Infusium leave in treatment on my hair and it had been working fabulously. But, my little brother managed to spill the entire bottle on my floor. After thinking of buying another bottle, I bought a replacement conditioner for the time being for the rest of the week. I was wondering what it is in Infusium that works so well with my hair? I heard that it may cause your hair to weaken. Is this true?

The Right Brain Responds:

Infusium 23 has been around for many, many years (although now it’s owned by P&G) and it’s a very nice leave-in formula. What’s in it that makes it work so well? Let’s take a look at the ingredient list:


Water, Amodimethicone, PEG-40 Hydrogenated Castor Oil, Panthenol, Cetrimonium Chloride, Dimethicone Copolyol, Polyquaternium-11, Citric Acid, Betaine, Glycerin, Sorbitol, Tricontanyl PVP, PPG-2 Methyl Ether, Serine, Glycine, Glutamic Acid, Arginine, Threonine, Lysine, Alanine, Proline, Hydroxyethylcellulose, PEG-8/SMDI Copolymer, Behenic Acid, Palmitoyl Myristyl Serinate, Oleic Acid, Palmitic Acid, Linoleic Acid, Stearic Acid, Arachidic Acid, PEG-8, Polysorbate 80, Amino Methylpropanol, Fragrance, Sodium PCA, Methylparaben, Methylisothiazolinone, Methylchloroisothiazolinone

If we strip this list down to the basic, functional ingredients it looks like this:

Amodimethicone, PEG-40 Hydrogenated Castor Oil, Cetrimonium Chloride, Dimethicone Copolyol, Polyquaternium-11

Infusium action

Of these ingredients, two are really doing most of the work: amodimethicone (which is a water soluble silicone dispersion) and cetrimonium chloride (a very simple but very effective quaternary ammonium compound which sticks to damaged areas of the hair.)

Does it weaken hair? No. All conditioners work by smoothing the cuticle and lubricating the hair shaft to protect hair from damage. Infusium does that very nicely without weakening the hair.

The Beauty Brains bottom line:

If you like leave-in conditioners, you’ll probably like Infusium 23. Make your brother buy you a new bottle and don’t worry about weakening your hair.

How do YOU like to conditioner your hair? Leave in? Rinse out? Leave a comment and share your conditioning tips with the rest of the Beauty Brains community.

{ 3 comments… add one }

  • kristy March 5, 2014, 1:21 am

    this helped!!

  • Jess October 14, 2015, 4:47 pm

    My Infusium23 has DMDM HYDANTOIN (FORMALDEHYDE RELEASER). The ewg.org says it’s kinda bad.

    • Randy Schueller October 15, 2015, 9:04 am

      High levels of formaldehyde gas can cause health problems. The low levels released by this preservative are not dangerous unless you have an allergic/sensitizing reaction to the ingredient. Most people use products with DMDM with now problems at all.

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