AceShowbiz - Jessica Alba celebrated her first Mother's Day as the mom of baby son Hayes by donating 1.5 million diapers from her The Honest Company to women in need. The mom-of-three gave the diapers to non-profit Baby2Baby, which provides children under 12 years of age with basic necessities like diapers and clothing.

"At The Honest Company, we're devoted to empowering people to live happy, healthy lives," she tells PEOPLE. "A mother should never have to choose between feeding her children and buying diapers. Baby2Baby helps new mothers so they don't have to make that impossible decision, and we can't think of a better charitable partner for The Honest Company."

In honor of #mothersday we @honest are donating to @baby2baby 1.5M diapers! Read the @people exclusive- link in bio!

A post shared by Jessica Alba (@jessicaalba) on May 14, 2018 at 7:52am PDT

Alba has also pledged to give the non-profit diaper and hygiene bundles for 600 families a year.

Meanwhile, Alba also reflected on motherhood in a legthy post on Instagram, revealing how much she has changed since becoming mum to Honor, Haven, and Hayes, who was born on New Year's Eve.

"Motherhood: it's a doozy, isn't it?" she wrote. "Your world gets turned completely upside down. Everything you thought you knew about what was important is no longer... Little people change you. To love and need someone that much and have them love and need you just as much... it's the best and hardest and most heartbreaking thing there is..."

She also paid tribute to fans and The Honest Company consumers for helping her become the mom she is.

Motherhood: it’s a doozy, isn’t it? Your world gets turned completely upside down. Everything you thought you knew about what was important is no longer. And all the things you once took for granted — like sleep, and sitting down to eat an actual meal — become the greatest luxuries. Little people change you. To love and need someone that much and have them love and need you just as much…it’s the best and hardest and most heartbreaking thing there is. I still can’t believe it, but my oldest baby is almost 10 years old. And you know what? She doesn’t need me in the same ways she once did. There goes that heartbreak again…but it’s true. The time we have with our little ones when they’re actually little is so fleeting. And it’s a reminder for me to be present and cherish every messy moment. Every tantrum, every tired cry, every bit of these days that sometimes feel like they’ll never end. Because the truth is, they will. As a first-time mother, I was still learning about this person I had become. And I felt like everything had to be just perfect. But these days, I’m ok if my baby cries a little bit…because I know he’ll be ok. And so what if the dishes pile up in the sink…and if my living room looks nothing like the Instagram post five seconds after I take the picture. It’s all ok. This Mother’s Day (and really, every day), I want to thank you for trusting us @honest to be a part of your journey. And I want to let you know that even if it doesn’t always feel like it, you’ve got this. It’s not gonna be perfect. But you’re an amazing mama. And that’s everything. xo. 😘❤️✨

A post shared by Jessica Alba (@jessicaalba) on May 12, 2018 at 12:10pm PDT

#mothersday brunch w my 3 babies -heart is full! 💗#momof3

A post shared by Jessica Alba (@jessicaalba) on May 13, 2018 at 3:28pm PDT

"As a first-time mother (to Honor, who was born in June, 2008), I was still learning about this person I had become," she added. "And I felt like everything had to be just perfect...," she said. "This Mother's Day (and really, every day), I want to thank you for trusting us @honest to be a part of your journey. And I want to let you know that even if it doesn't always feel like it, you've got this. It's not gonna be perfect. But you're an amazing mama. And that's everything."