This infant vitamin D spray delivers 400 IU (10 mcg) of **vitamin D3** per dose — exactly the daily amount pediatric guidelines (AAP and the NHS) recommend for breastfed and partially breastfed babies, who don't get enough vitamin D from breast milk alone. It's delivered as cholecalciferol (D3), the form your baby's body uses most effectively, and the spray format means you can dose a baby who can't yet swallow drops or pills by spraying directly onto the inside of the cheek.

At 400 IU, this isn't an over- or under-dose: it's the standard requirement for supporting healthy bones, developing teeth, and immune function in the first year. The one note on fit — if your baby is formula-fed and taking at least 1 litre (about 32 oz) of fortified formula a day, they may already be getting enough vitamin D, so check with your pediatrician before adding more.

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BetterYou

D400 Infant Vitamin D Daily Oral Spray

Liquid · 0.13 M L · 100 servings · $2.56/serving

iHerbAmazon

Best for

ImmuneDentalBone & Joint

Ingredients (1)

Vitamin D

100%

Dose

3000 IU

Target

1000–5000 IU

Form

Premium

Children's product — scores and dose assessments use adult reference ranges. Actual adequacy may differ for children.

Other Ingredients

No other ingredients listed

How to Take It

Take it anytime

Fat-soluble — take with your largest fat-containing meal. Time of day doesn't matter.

With a meal containing fat

General guidance based on the ingredients, not a substitute for the label or your doctor.

Price Check

$256.00

$10$20

Pricier than 99% of 552 vitamin D supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

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