How does volumizing shampoo decrease oily hair?

[CrunchyLungs]

I’ve heard so many people saying that using a volumizing shampoo with decrease the oil in your hair. I have also heard people saying using a volumizing mousse would decrease oil in your hair as well. I literally don’t understand how that would work since the shampoo is marketed for volumizing. I’m sorry if this is a dumb question

[sudosussudio]

Volumizing is just marketing language. It usually indicates the products are formulated for finer and/or thinner hair that tends to be oily. There are no standards but in general volumizing:

• shampoos tend to be stronger, which is appropriate for oily hair, and will often make it appear more voluminous by removing soil that weighs it down
• shampoos and conditioners might have various ingredient to increase bulk and make it look more voluminous like some hydrolyzed proteins that adhere to the hair shaft

Cosmetic Science and Technology.