3 Red Flags of Vitamin Deficiency in Kids

Over 1 million parents trust first day with their kid's nutritional needs. It's because we formulated our multivitamins in tandem with Harvard and Yale researchers specifically for kids. A blend of 21 superfoods and 9 essential vitamins helps take care of their holistic nutritional needs.

Kristin Carawine

Kristin Carawine

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Updated 3/30/2026
Red Flag #1

Moodiness, Outbursts, and Rude Behavior

If you find yourself dealing with freqent mood imbalances and irritability, it may be linked to deficiencies in vitamins like B9 and B6. These help regulate mood and energy levels. Without enough of them, your child’s body can struggle with managing stress or stabilizing emotions.*

✅ Supplementing with the right blend can help replenish those gaps, making calm moments last longer—and tantrums less frequent.*

Support Mood with Nutrition
Red Flag #2

Picky Eating

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Mealtime battles aren't always just a phase—they can be a sign of nutrient deficiencies. For example, Vitamin B deficiencies can dull taste buds, and low vitamin D levels can impact appetite regulation.

✅ A well‒rounded supplement can help restore balance, making healthier foods more enticing and breaking the picky eating cycle.

Build Healthy Habits Today
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Red Flag #3

Bedtime Battles

Poor sleep could be more connected to nutrition than most people realize. Vitamins like B6, B12, and D3 play a crucial role in regulating your child’s sleep‒wake cycle. For example, Vitamin B6 supports melatonin production, which is the hormone that signals it’s time to sleep.

✅ A daily multivitamin that includes these nutrients can help promote relaxation, making bedtime smoother and nights more restful.

Conquer Bedtime Battles
The "No Junk"™ Kids’ Multi

The "No Junk"™ Kids’ Multi Daily Gummies For Improved Mood & Behavior

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

Flavor: 🍓 Strawberry & 🍊 Orange

Enhanced Nutrition & Immunity Enhanced Nutrition & Immunity
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Improved Behavior Improved Behavior
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of customers say First Day vitamins support their child's overall mood & behavior.†

Better Sleep Routines Better Sleep Routines
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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.
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This Product is For Kids Ages 4 - 12
ToddlersAges 2 - 3
TeensAges 13 - 17
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See Why Parents & Doctors Notice Immediate Health Changes

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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