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Hiya and First Day are the two kids' vitamin brands most likely to show up in your Instagram feed, and they look almost interchangeable from the ads: cheerful branding, clean-label promises, monthly boxes. Read the actual labels and they split cleanly. One is a zero-sugar chewable for kids as young as 2, the other is a low-sugar gummy for kids 4 and up, and they follow opposite dosing philosophies. This comparison walks through the labels, the math, and the age brackets the way we would for our own family, because these are the questions we actually worked through before deciding what our own kids would (and would not) take.
Before you decide
Start with the uncomfortable part: your child may not need either product. The American Academy of Pediatrics states plainly that healthy children eating a normal, well-balanced diet do not need vitamin supplementation beyond the recommended dietary allowances. A kid who eats some fruit, some dairy or fortified alternatives, and some protein most days is usually covered, even if dinner negotiations feel like a hostage situation.
There are real exceptions. Kids on restrictive diets (vegan, dairy-free, severely selective eaters), kids with malabsorption conditions, and kids flagged by a pediatrician for a specific deficiency can genuinely benefit from supplementation. A 2012 analysis of national nutrition data in The Journal of Pediatrics found that supplements helped close some micronutrient gaps in children but also pushed some intakes above safe upper limits, and still left calcium and vitamin D short in many age groups. Supplements are a blunt tool. Use them for a reason, not as a ritual.
Two more caveats before the comparison. First, neither brand is appropriate under age 2; for infants, targeted single products such as vitamin D drops or a probiotic like the one we covered in our BioGaia Protectis baby drops review are what pediatricians actually discuss. Second, none of this is medical advice. If your child takes medication, has a chronic condition, or you suspect a deficiency, talk to your pediatrician first. This comparison is for parents who have already decided a daily multivitamin makes sense and are choosing between these two heavily advertised options.
What you're actually buying
Hiya's Kids Daily Multivitamin is a chewable tablet labeled for ages 2 to 12. The label lists 15+ vitamins and minerals, including 25 mcg (1,000 IU) of vitamin D, 40 mg of vitamin C, zinc, iodine, and selenium, with no iron. It contains 0g added sugar and is sweetened with monk fruit extract and mannitol. The first order ships in a refillable glass bottle; refills arrive monthly in pouches. Hiya says the product is third-party tested for heavy metals and microbials and is Clean Label Project Certified.
First Day's Kids' Multi is a gummy labeled for ages 4 to 12, taken as two gummies daily, 30 servings per bottle. The product page lists nine essential vitamins plus an organic superfood blend (Innerbody's transcription of the supplement facts panel additionally recorded vitamin E, zinc, and magnesium, so check the current label if a specific nutrient matters to you), and the brand advertises it as vegan, non-GMO, and free from the top nine allergens. Each serving carries about 2g of sugar, which is low for a gummy but not zero. Independent testers at Innerbody who transcribed the supplement facts panel recorded deliberately modest doses: 10 mcg (400 IU) of vitamin D3, 20 mg of vitamin C, 130 mcg of vitamin A.
That dosing gap is the most interesting difference and the one the ads never mention. Hiya doses many nutrients at or near full daily values, an insurance-policy approach. First Day intentionally doses low, on the theory that food should supply most of a child's intake and the gummy just tops up the gaps. Neither philosophy is wrong. They suit different kids: a very selective eater arguably gets more coverage from Hiya, while a decent eater whose parent worries about over-supplementation may prefer First Day's restraint.
For context on where each dose lands: the RDA for vitamin D for children ages 1 to 13 is 600 IU (15 mcg) per day. Hiya's 1,000 IU sits above the RDA; First Day's 400 IU sits below it and assumes milk, fortified foods, and sunlight make up the rest. Neither number is alarming, but they reflect genuinely different assumptions about your child's diet.
Head-to-head: the age and format decision
Most Hiya vs First Day searches end at a question neither brand's homepage answers directly: what does my child's age actually allow? Here is the decision tree we would use.
Under 2: neither. Both labels exclude this age group, and whole-food nutrition plus any pediatrician-directed single supplements (vitamin D drops for breastfed babies, for example) is the standard of care. Do not chop up an older sibling's chewable.
Ages 2 to 3: Hiya is the only one of the two on the table. First Day's label starts at 4, full stop. If you want this comparison settled for a toddler, it settles itself. The relevant question becomes whether a 2-year-old needs a multivitamin at all, and for most toddlers who drink milk and eat some variety, the AAP's answer leans no.
Ages 4 to 12: both qualify, so the decision moves to format and sugar. A chewable tablet has real advantages: no added sugar, less sticky residue on molars, and no candy resemblance. A gummy has one big advantage, and it is not nutritional: compliance. Some kids flatly refuse chewables and happily take gummies, and a vitamin your child refuses delivers exactly nothing. We walked through this trade-off in more depth in our guide to the best supplement format for kids.
The dental angle deserves its own paragraph because pediatric dentists bring it up constantly. Sticky, sugary foods cling to the grooves of children's teeth, and AAP News has described how they create ideal conditions for cavities. First Day's 2g per serving is modest, but the stickiness of any gummy matters as much as the sugar count. If your child has a cavity history, that alone is a reasonable tiebreaker toward Hiya's chewable, ideally taken before brushing rather than after.
The numbers side by side
Every figure below comes from the brands' own product pages as of August 2026, plus Innerbody's label transcription for First Day's vitamin D. Where a brand does not publish a number, we say so rather than guessing.
| Spec | Hiya Kids Daily Multivitamin | First Day Kids’ Multi |
|---|---|---|
| Label age range | 2 to 12 years | 4 to 12 years |
| Format | Chewable tablet, 1 per day | Gummy, 2 per day |
| Sugar per serving | 0g added sugar (monk fruit, mannitol) | About 2g |
| Nutrients listed | 15+ vitamins and minerals | 9 vitamins plus superfood blend; no minerals on the current product page (Innerbody’s panel transcription listed small zinc and magnesium amounts) |
| Vitamin D per serving | 25 mcg (1,000 IU) | 10 mcg (400 IU), per Innerbody’s label transcription |
| Iron | None listed | None listed |
| Subscription price | About $30/month (first order about $15) as of August 2026 | About $23.40/month as of August 2026 |
| One-time purchase | Subscription-first model; also sold via Amazon | About $39 list as of August 2026; also at Target and Amazon |
| Multi-child discount | Yes, regular price about $28/child for 2 kids down to about $23/child for 5 (advertised $14 and $11.50 tiers are first-order promo prices) | Not published on the product page |
| Testing claims | Third-party tested for heavy metals and microbials; Clean Label Project Certified | Clean Label Purity Award badge |
One honest note on that table: neither brand carries USP or NSF certification, the two verification programs with the strictest public standards. Both lean on Clean Label Project programs, which test for contaminants but are less transparent about pass criteria. That puts the two brands roughly level on verification, and slightly behind a few cheap drugstore products that do carry USP marks.
Price per month: the honest math
At regular prices as of August 2026, Hiya runs about $30 per month for one child, which is about $1.00 per day. The heavily advertised 50 percent discount applies to the first order only, so budget on the full price. First Day's subscription at about $23.40 per month works out to roughly $0.78 per day, with the one-time bottle at about $39 (about $1.30 per day) for people who refuse subscriptions.
The multi-child discount narrows the gap but does not close it. Hiya's regular per-child pricing drops to about $28 each for two children and about $23 each for five (the advertised $14 and $11.50 tiers are first-order promo prices), while First Day's product page does not publish a sibling discount. For a two-kid household, Hiya at about $56 total per month still costs more than two First Day subscriptions at about $46.80. At published regular prices, First Day is the cheaper subscription per child at any household size.
Now zoom out, because this is where both brands lose to the supermarket. Mass-market chewables and gummies from brands like Olly, Vitafusion, and store labels commonly cost a fraction of either subscription, and we compared two of the biggest in our Olly vs Vitafusion breakdown. You are paying the DTC premium for clean-label positioning, the refill ritual, and marketing, not for nutrients that cost more to make. Whether that premium is worth $200 to $300 a year per child is a values question, not a nutrition question.
Who should pick Hiya (and who First Day)
Hiya is the better fit for toddlers, for cavity-prone kids, and for zero-sugar households. It is the only option here for ages 2 and 3, the chewable format sidesteps the sticky-gummy dental problem, and the broader mineral coverage (zinc, iodine, selenium) suits genuinely selective eaters. Families with several kids get a modest published per-child discount, from about $30 down to about $23 per child, though First Day still prices lower per child at regular rates. The trade-offs: higher single-child price, doses that run above the RDA on some nutrients, and a subscription-first model you have to remember to manage.
First Day is the better fit for gummy-only kids aged 4+ and for parents who prefer minimal dosing. If your child treats every chewable as a personal insult, a 2g gummy the kid actually takes beats a 0g tablet in the trash. The allergen profile is also unusually clean, with the top nine allergens excluded, which matters for allergy households. The trade-offs: no option under age 4, no minerals featured on the current label, sugar that is low but not zero, and vitamin D at 400 IU, below the 600 IU RDA, by design.
If your real concern is sleep or restlessness rather than general nutrition, note that neither product contains meaningful magnesium. That is a separate decision we covered in our guide to magnesium supplements for kids, and it should stay separate rather than being solved with a multivitamin.
What to look for when buying
Check the label age floor first, every time. Marketing photos show toddlers; labels rule. The label age range is a regulatory and safety line, not a suggestion, and First Day's floor of 4 versus Hiya's floor of 2 is the single hardest fact in this comparison.
Read sugar and sweetener lines together. Zero sugar usually means sugar alcohols or monk fruit, which some kids' stomachs handle better than others; 2g of sugar is half a teaspoon, modest but daily. Check the serving count against your child's dose too, since two gummies a day empties a 60-count bottle in a month.
Finally, treat subscriptions as the products they are. Note the regular price after the first-order discount, find the cancellation page before you subscribe, and set a calendar reminder for a month in. Vitamins bought at supermarket prices and actually taken beat premium subscriptions abandoned in a drawer.
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FAQ
Can my 3-year-old take First Day?
No. First Day's Kids' Multi is labeled for ages 4 to 12. Of these two brands, only Hiya is labeled from age 2. For a 3-year-old, the honest first question is whether a multivitamin is needed at all; the AAP's default answer for kids on varied diets is no.
Is 2g of sugar per serving a lot?
It is about half a teaspoon, low compared with typical gummy vitamins. Pediatric dentists worry less about the grams and more about the sticky format, which clings to molars. If your child gets gummies, give them with a meal and before brushing, not as a bedtime treat.
Does either vitamin contain iron?
Neither product lists iron. That is standard for kids' chewables and gummies, partly because iron overdose is a serious pediatric poisoning risk. If a pediatrician has flagged low iron, that requires its own prescribed product, not either of these.
Do I have to subscribe?
First Day sells one-time bottles at about $39 as of August 2026 and is stocked at Target and Amazon. Hiya is built around a monthly refill subscription through its own site, though Amazon listings exist. If subscriptions annoy you, First Day is structurally easier to buy once.
Which one has better third-party testing?
They are roughly equivalent. Hiya cites third-party contaminant testing and Clean Label Project certification; First Day displays a Clean Label Purity Award. Neither carries USP or NSF verification, the stricter public standards.
Will a multivitamin make my picky eater healthier?
Probably not in any way you can see. Research on supplement use in children shows gap-filling for some nutrients, over-shooting on others, and no substitute for food patterns. Use a multi as a backstop during a picky phase if you like, and keep working on the plate.
The bottom line
The age floor decides this comparison for many families before anything else does: Hiya from 2, First Day from 4. Past that, Hiya offers zero sugar, a chewable format, broader minerals, and a modest sibling discount at about $30 per month regular for one child, while First Day offers a low-sugar gummy kids accept willingly, a strict allergen-free profile, and a cheaper single-child subscription at about $23.40 per month as of August 2026. Neither is a bad product, and neither is necessary for most kids eating a varied diet. Pick by your child's age, teeth, and stubbornness, buy at the real recurring price rather than the intro discount, and remember that the supermarket aisle solves this problem for a third of the money.
