Preferred by 1,000,000+ Families Worldwide

One Family. Every Age. The Right Nutrients To Improve Mood, Nutrition & Behavior.

Growing bodies don't all need the same thing at the same time. First Day builds a Bio-Matched formula for exactly where your child is right now, from toddler years through the teen years, so every kid in the house gets what their age actually calls for.

Improve Your Family's Health
5,000+ Reviews

"Very happy with these vitamins!! They really seem to helping us with my teen's energy, sleep and her all‒around attitude is so much better!"

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Growing bodies don't all need the same thing at the same time. First Day builds a Bio-Matched formula for exactly where your child is right now, from toddler years through the teen years, so every kid in the house gets what their age actually calls for.

Improve Your Family's Health
5,000+ Reviews

"Very happy with these vitamins!! They really seem to helping us with my teen's energy, sleep and her all‒around attitude is so much better!"

Save Up To 52% Off w/ 4 Free Gifts

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Build Your Custom Box w/ Unlock Up To 4 FREE Gifts!

One smart daily gummy bundle to send your kid to school with an edge. Including nutrients shown to support classroom focus, reduce sick days, and sleep through the night to be ready for the next school day.

🎁 Bonus Gift - Get a FREE 12 pack of our Rapid Hydration Electrolytes ($25 value!) - perfect for packing in a lunchbox!

Reduce Sick Days & Germ Spread Reduce Sick Days & Germ Spread
95%

of parents say First Day vitamins support their child's overall health & immunity.†

Did You Know: A study from the U.S. Department of Education showed that students who were regularly absent due to reasons like sick days were much less likely to read at grade level.

Enhance Focus & School Performance Enhance Focus & School Performance
86%

said it was effective in supporting overall school performance or structured learning.

Balance Energy & Get To School Well-Rested Balance Energy & Get To School Well-Rested
90%

agree that First Day is better than other sleep support solutions they have tried.

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🎁 4/4 Free Gifts

100% Money Back Guarantee

Less than 1% of First Day customers claim our Money-Back Guarantee!

First Day Subscription Benefits

  • Special discounts & early product access!
  • Renews every 4 weeks. Delay or cancel anytime.
  • Adjust your delivery frequency as needed in your account.

We recommend a subscription so that you can experience a variety of First Day's clinician recommended products.

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What You Can Expect Noticeable Benefits Over Time

  1. Stronger Daily Nutrition
    7 Days

    Stronger Daily Nutrition

    Supports essential nutrients for growth, energy, and everyday wellness—helping your family feel your best from the start.

  2. Steadier Mood
    30 Days

    Steadier Mood

    With added nutrients such as B12 and B6, your energy levels start to balance, making your family more comfortable and on track every day.

  3. Healthier Eating Habits
    60 Days+

    Healthier Eating Habits

    When your family feels better after having your nutrition gaps filled, making healthier eating choices becomes more natural.

Life Changing Results from Doctors and Real Customers

Dr. Lei Chen

"These vitamins are exactly what I recommend to parents looking for quality nutrition."

Dr. Lei Chen

MD, MHS at Yale University

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Diana V.

"These are the best tasting vitamins I ever purchased. It feels like I am having a treat. These are the only ones so far that my kids like too."

Diana V.

Verified Purchaser

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"A revolutionary approach to children's health."

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Dr. Ed Giovannucci

"We choose partners carefully, and First Day’s dedication to research, formulation integrity, and transparent quality practices makes them a brand we’re proud to align with."

Dr. Ed Giovannucci

MD, MPH, ScD at Harvard University

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of parents see improved health & wellness

0%

of kids ask for their vitamins daily

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customer satisfaction rate

Why We Are the Top Multivitamin

Why We Are the Top Multivitamin

Fights Hidden Hunger

80% of children don't eat enough fruits and veggies, contributing to a nutrient deficiency known as hidden hunger. Our gummies fight hidden hunger with essential nutrients critical to development.

Developed Alongside Harvard & Yale Scientists

Our product was crafted with input from leading scientists at Harvard and Yale, combining the latest research with high-quality ingredients to deliver a multivitamin parents can trust.

Backed by Modern Science

Vitamin B6 supports natural energy regulation, promoting healthier sleep patterns and making it easier for kids to get restful sleep.*

Pediatrician-Approved

Recommended by pediatricians, our multivitamin is designed to meet the unique needs of your family ensuring they get the support they need from a trusted source.
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Clean Label Project® Purity Award

Our products were independently tested by Clean Label Project® for harmful chemicals like heavy metals, pesticides, and plasticizers, exceeding typical industry practices.

Ingredients Sourcing and Dosage

We source each ingredient with care, choosing only the highest quality vitamins and minerals. Our dosage is tailored for teens, providing safe and effective support without risking overuse or unwanted additives.

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45-Day Money Back Guarantee

Why Should You Choose First Day?

Made for modern families living on modern diets, we’re here to fill the nutrition gaps that today’s food often leaves behind.

First Day
Other Brands
Clean Label Certified
Free Gifts With Purchase
Research Backed
No Fillers Or Fake Ingredients
Vegan, Gluten-Free, Non-GMO
Money-Back Guarantee
45 Days
45 Days