Comments on: How do 2 in 1 shampoos work? http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/ Cosmetic chemists answer your beauty product questions! We are a group of cosmetic scientists who understand what the chemicals used in cosmetics really do, how products are tested, and what all the advertising means. Fri, 10 Feb 2012 03:42:30 +0000 hourly 1 http://wordpress.org/?v= By: Maria http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/comment-page-1/#comment-67598 Maria Fri, 18 Mar 2011 14:57:13 +0000 http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/#comment-67598 The lady behind the counter in our local health food store once told me that when you use shampoo, it causes the scales on your hairs to stand up, and when you condition it it smoothes them back down again...but if you use a 2in1 then it just leaves your hair in a un-uniform mess with some up and some down...is this the case? The lady behind the counter in our local health food store once told me that when you use shampoo, it causes the scales on your hairs to stand up, and when you condition it it smoothes them back down again…but if you use a 2in1 then it just leaves your hair in a un-uniform mess with some up and some down…is this the case?

]]> By: Vikki http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/comment-page-1/#comment-65918 Vikki Tue, 08 Feb 2011 05:41:19 +0000 http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/#comment-65918 What i have been wondering is what is the best to use for your hair??? Shampoo plus conditioner, or shampoo and a conditioner after??? A friend of mine said that the shampoo plus conditioner is not as good for your hair as regular shampoo... What i have been wondering is what is the best to use for your hair??? Shampoo plus conditioner, or shampoo and a conditioner after??? A friend of mine said that the shampoo plus conditioner is not as good for your hair as regular shampoo…

]]> By: Marcus DiMarco http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/comment-page-1/#comment-64798 Marcus DiMarco Thu, 13 Jan 2011 01:05:14 +0000 http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/#comment-64798 Sarah, Good question. I haven't seen any studies that answer that. If anyone has, that would be very useful to formulators. I have seen one study where they look at electron microscope images of hair. When the hair was bleached and washed with something with a silicone in it the silicone deposited, but when they added another (new and mostly unknown) ingredient (I forgot which, not glycol distearate but maybe similar), much more silicone deposited. Maybe a chemist can look at the molecules in sebum and see if they interact with the molecule of dimethicone (and/or other silicones like cyclomethicone). If they can react and combine or have affinity for each other then the silicone may prevent thorough cleansing by preventing detergents from surrounding the sebum molecules fully. One way to definitively know the answer would be for someone to do a study with greasy hair and wash some of the hair with a 2 in 1 shampoo and the other with regular shampoo then conditioner (like suave; so the shampoo doesn't have silicone). Then compare the differences with an electron microscope. If the silicone interferes with the cleansing ability then their might be a less uniform surface from the 2 in 1 vs the separate treatments. Sarah,

Good question. I haven’t seen any studies that answer that. If anyone has, that would be very useful to formulators. I have seen one study where they look at electron microscope images of hair. When the hair was bleached and washed with something with a silicone in it the silicone deposited, but when they added another (new and mostly unknown) ingredient (I forgot which, not glycol distearate but maybe similar), much more silicone deposited.

Maybe a chemist can look at the molecules in sebum and see if they interact with the molecule of dimethicone (and/or other silicones like cyclomethicone). If they can react and combine or have affinity for each other then the silicone may prevent thorough cleansing by preventing detergents from surrounding the sebum molecules fully.

One way to definitively know the answer would be for someone to do a study with greasy hair and wash some of the hair with a 2 in 1 shampoo and the other with regular shampoo then conditioner (like suave; so the shampoo doesn’t have silicone). Then compare the differences with an electron microscope. If the silicone interferes with the cleansing ability then their might be a less uniform surface from the 2 in 1 vs the separate treatments.

]]> By: Amy http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/comment-page-1/#comment-59752 Amy Sun, 26 Sep 2010 18:14:05 +0000 http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/#comment-59752 What do you think about Suave 2 in 1? What do you think about Suave 2 in 1?

]]> By: Sarah http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/comment-page-1/#comment-50876 Sarah Thu, 11 Mar 2010 21:15:35 +0000 http://thebeautybrains.com/2006/06/06/how-do-2-in-1-shampoos-work/#comment-50876 So, does the application of the silicone interefere with the shampoo's ability to remove grease from your hair? I mean, obviously that's part of the point. As you say above, making your hair "too clean" results in hair that feels unpleasant to today's consumer. But does the silicone coat over grease that should be washed away? Or, does the silicone simply get released in the process of lathering and then stay behind on your hair when foam, cleanser, and dirt/grease wash down the drain? Thanks for clarifying that point! So, does the application of the silicone interefere with the shampoo’s ability to remove grease from your hair? I mean, obviously that’s part of the point. As you say above, making your hair “too clean” results in hair that feels unpleasant to today’s consumer. But does the silicone coat over grease that should be washed away? Or, does the silicone simply get released in the process of lathering and then stay behind on your hair when foam, cleanser, and dirt/grease wash down the drain? Thanks for clarifying that point!

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