5 Reasons Pediatricians Insist on filling these Nutrient gaps in Teens

Note: Read this before you struggle with your kid's next dinner battle.

Kristin Arteminia

Sponsored

Updated 06/28/2026

Most parents see real changes within the first month. The most common mistake is inconsistency, skipping days resets the progress. First Day is the vitamin kids ask for. No fighting, no spitting it out, no "do I have to." Just two precisely formulated gummies, every day, doing their job.

Day 7 — First Signs

Methylfolate and B6 begin supporting the neurotransmitters behind mood and motivation.

83% of parents report seeing a shift in their kid's mood within the first two weeks.*

Day 30 — Visible Changes

Methylfolate has fully replaced the folic acid most kids' bodies were struggling to convert. The 21 superfoods are filling in what their diet's been missing.

98% of parents say First Day supports their kid's overall health and nutrition.*

Day 90 — Full Impact

All 10 critical nutrients and the superfood blend are working together at the doses matched to your child's age.

75% of parents report visible improvement in skin health.*

*Based on a survey of First Day customers.

Immediate Results Start Here

Formulated using over 35,000 scientific studies, every nutrient in First Day is in the form, and the dose, your child's body was actually designed to absorb, matched to their exact age and developmental stage. No guessing. No generic adult dose, shrunk down. Just what their biology actually needs, at the age they need it with no fillers, artificial sugars or colors.

Every nutrient in First Day exists because your child's body is already built to recognize it. Not the lab-made version that looks right on a label and passes right through. The version their biology was designed to absorb, in amounts matched to their age, paired so each one makes the others work harder.

Most kids' vitamins are dosed once and sold to every age, using cheap forms the body struggles to absorb in the first place. First Day is Bio-Matched: the right form, the right dose for your child's exact age, and nutrients paired so they activate each other instead of canceling out. Formulated this way, two gummies daily can address the wide range of problems that show up when specific nutrients are missing

✓ Mood Support
✓ Focus & Attention Support
✓ Immune Support
✓ Sleep Support
✓ Picky Eating Support
✓ Growth & Development Support
✓ Energy Support
✓ Skin Support
✓ Behavior Support

Your picky eater won't touch a salad. Their body needs the vitamin C and A you can't get them to eat.

First Day's Kids' Multivitamin fills that gap with 21 organic superfoods. Not synthetic isolates. One packet. No negotiation. Kids ask for it every morning.

Why it works: Real food sources mean their body actually recognizes and uses what you're giving them. No artificial colors, no fillers, no melatonin trap (unlike most kids' brands).

The outcome: immune cells that respond to everyday germs. Vision that develops normally. Growth that doesn't stall while you wait for them to eat broccoli.

The "No Junk"™ Kids’ Multi

Deliciously nutritious daily multivitamin gummies packed with 21 organic superfoods and 9 essential vitamins.

Flavor: Strawberry & Orange

Enhanced Nutrition & Immunity

95%

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

Improved Behavior

83%

of customers say First Day vitamins support their child's overall mood & behavior.†

Better Sleep Routines

82%

said these vitamins are improving their child's overall bedtime routines & sleep quality.†

Monthly

$25.00 Gift for orders +$75 (FREE)

$5.00 Shipping (FREE)

Cancel anytime, no questions asked

Save up to 52% NOW with code

One-Time

with code SUMMERSALE

You're missing out on free shipping!

You're 87% less likely to build a healthy habit without subscribing. You can cancel anytime!

Higher Cost

Enjoy free shipping on your first subscription month.

1‎ Bottle

Save $15.80

2‎ Bottles

Save $31.59

3‎ Bottles

Save $47.39

4‎ Bottles

Save $63.18

Rapid Hydration Electrolyte Support - Gift

You are $75 away, keep going!

Kids' Daily Focus Brain Support

Support for focus, learning, and behavior.

Kids' 3-in-1 Pre+ Post+ Probiotic

To support immunity, digestion, and oral health.

Kids’ Nighttime Reset Magnesium

Melatonin-free support for relaxation & sleep.

Subtotal

You are saving a total of $48.08!

The "No Junk"™ Kids’ Multi (2x)

Shipping

45 day money-back guarantee¹.

Over 100 million gummies sold.

Join over 1 million parents who switched to First Day!

Ingredients

We are thoughtful about the ingredients we select, use REAL organic fruits & vegetables, and keep out long lists of ingredients that can't even be pronounced.

Organic Superfoods Blend: Apple, Kale, Broccoli, Spinach, Carrot, Parsley, Beet, Green Cabbage, Raspberry, Blueberry, Strawberry, Tomato, Aronia Berry, Chlorella, Maca, Moringa, Reishi Mushroom, Cordyceps Mushroom, Lion's Mane Mushroom, Turmeric, Ginger.

 
Other Ingredients: Tapioca Syrup‡, Cane Sugar‡, Water, Pectin, Citric Acid, Natural Flavors, Superfood Powdered Blend‡ (Apple‡, Kale‡, Broccoli‡, Spinach‡, Carrot‡, Parsley‡, Beet‡, Green Cabbage‡, Raspberry‡, Blueberry‡, Strawberry‡, Tomato‡, Aronia Berry‡, Chlorella‡, Maca‡, Moringa‡, Reishi Mushroom‡, Cordyceps Mushroom‡, Lion's Mane Mushroom‡, Turmeric‡, Ginger‡), Carrot and Blackcurrant and Red Bell Pepper Juice for Color.
‡Organic

Free From The Top 9 Allergens: We are dairy-free, soy-free, egg-free, gluten-free, peanut-free, tree nut-free, fish-free, shellfish-free, and sesame-free.

Supplement Facts

Subscription Details

You'll receive a stylish refillable bottle on your first order, then receive our eco-friendly refill pouches every 30 days on a physician-recommended schedule.

Plus, you'll receive these benefits:

Savings every single month.
Free shipping on your first order.
Easy management - skip or pause whenever you need.
VIP access to sales, gifts, early access & more.
Cancel anytime.

This Product is For Kids Ages 4 - 12

ToddlersAges 2 - 3

TeensAges 13 - 17

Worried about your toddler’s eating habits? Meet the toddler multivitamin that’s giving little ones a nutrition boost! Made with 10 nutrients and a blend of 21 organic superfoods in a formula designed just for 2 & 3 year olds.

Flavor: Strawberry & Orange

Enhanced Nutrition & Immunity

95%

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

Improved Behavior

83%

of customers say First Day vitamins support their child's overall mood & behavior.†

Better Sleep Routines

82%

said these vitamins are improving their child's overall bedtime routines & sleep quality.†

Deliciously nutritious daily multivitamin gummies packed with 21 organic superfoods and 9 essential vitamins.

Flavor: Strawberry & Orange

Enhanced Nutrition & Immunity

95%

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

Improved Behavior

83%

of customers say First Day vitamins support their child's overall mood & behavior.†

Better Sleep Routines

82%

said these vitamins are improving their child's overall bedtime routines & sleep quality.†

A delicious daily gummy designed specifically for teens to support daily nutrition and development. A unique organic fruit and veggie blend, plus 12 key nutrients.

Flavor: Orange

Improve Overall Health & Nutrition

98%

of parents say First Day vitamins support their teen's overall health & nutrition.†

Boost Mood & Motivation

83%

of customers say First Day vitamins support their teens' overall mood & behavior, and saw improved motivation for school.†

Promote Clear Skin

75%

said they saw an improvement to skin health, including reduced acne.†

See Why Parents & Doctors Notice Immediate Health Changes

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

Dr. Lei Chen

MD, MHS at Yale University

"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

"A revolutionary approach to children's health."

"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

95%

of parents see

improved health & wellness

95%

82%

of kids ask for

their vitamins daily

82%

97%

customer

satisfaction rate

97%

1 in 3 Families Have A Nutrient Deficiency.

I created First Day to address the massive concerns with todays diet and it's negative effects on our families.

The Average Person Consumes 52 Credit Cards’ Worth Of Microplastics Every Year.
Artificial Food Additives Are Found In 59% Of Foods Today
Fresh Fruits & Veggies Have Lost Up To 73% Of Their Nutrients

After learning about the massive amounts of sugar that were in typical kids multivitamins I reached out to 2 of the top researchers at Harvard and Yale. I explained my story to them, how I wanted to revolutionize the vitamin industry. After consulting with these experts to help us carefully formulate our vitamins, we are now a best selling multivitamin nationwide.

That's why we’re so confident First Day will help you get the results you want. If within the first 45 days you find yourself not completely satisfied, we’ll give you your money back - no questions asked.

Try with 45 Day Money Back Guarantee

I created First Day to address the massive concerns with todays diet and it's negative effects on our families.

The Average Person Consumes 52 Credit Cards’ Worth Of Microplastics Every Year.
Artificial Food Additives Are Found In 59% Of Foods Today
Fresh Fruits & Veggies Have Lost Up To 73% Of Their Nutrients