The Fantastic Four star first became aware of the potentially harmful chemicals used in everyday items when she was preparing to become a first-time mother in 2008.
She explains, "When I was pregnant with Honor, I did all of this research and I found out that all of these products have toxic chemicals in them that are in and around our kids and us and they're causing unnecessary harm on our families.
"I was like, this is nuts, from baby bottles to baby toys, to pacifiers to diapers, and it's completely unregulated, these toxins that companies are allowed to put in these products and they're basically just fillers."
Alba, now pregnant with her second child, became involved in an organisation called Safer Chemicals, Healthy Families and she is set to join fellow campaigners at a rally in Washington, D.C. to pressure lawmakers into taking action.
Raising the issue on The Ellen DeGeneres Show, Alba says, "I'm going to D.C. next week with this organisation called Safer Chemicals, Healthy Families, and we're trying to get Congress to have toxic chemical reform. So basically all the products that are on our shelves, everyday products, ...we wanna raise the bar to make sure these toxins aren't in our products.
"It shouldn't be a luxury; it should be a given (that baby products are toxin-free)."