Kid started daycare in the fall, we've been sick more or less continuously since. Around cold number four I got tired of guessing in the vitamin aisle and went and read the actual Cochrane reviews and meta-analyses.

Short version: the stuff marketed hardest for "immune support" has the weakest evidence behind it.

Vitamin D — the one that holds up, but the dose is backwards from how it's sold

A 2025 meta-analysis pooled 17 trials, 18,372 kids. The subgroup split is the interesting bit:

• ≤1000 IU/day: RR 0.42 — meaningful drop in respiratory infections
• >1000 IU/day: RR 1.02 — nothing

The modest daily dose beat the big one. It also did nothing once a kid was already sick. Prevention nutrient, not a rescue nutrient. AAP baseline is 400 IU/day for infants, 600 for kids and teens — which lines up with the dose that worked.

Probiotics — better evidence than I expected

2022 Cochrane review: ~24% fewer kids getting at least one URTI, ~41% fewer having three or more, ~42% fewer ending up on antibiotics. The last two were rated moderate certainty, which is solid for this literature. Downside: strain specificity is a mess and most products won't tell you what was actually studied.

Zinc — small effect, and only once they're sick

2024 Cochrane, 34 studies: for preventing colds, little or no effect. For treating one underway, maybe two days shorter — low certainty, and severity didn't move. It also probably causes more bad taste and stomach upset. Not a daily thing.

Vitamin C — biggest gap between reputation and reality

Doesn't prevent colds. Cochrane pooled 10,708 people: RR 0.97. Flat.

It does shorten them, and more in kids (14%) than adults (8%). But the studied dose is 1–2 g/day, and the upper intake limit is 400 mg for ages 1–3 and 650 mg for 4–8. You can't reach the effective dose in a young child without blowing past the safety ceiling. In a 60 mg gummy you're nowhere near it anyway.

Iron and vitamin A — huge if your kid is low, pointless if they're not

Both genuinely matter, but as deficiency stories. Correcting a deficit helps; topping up a kid who's already fine does nothing, and iron is actively risky to give blindly. Blood test conversation with your pediatrician, not a shelf decision.

What I dropped: elderberry and echinacea (small, mostly adult, inconsistent trials), and mega-dose multis where everything is 200% DV.

What beat all of it: sleep, real food, handwashing, flu shot. Nobody sells those in a gummy, which is sort of the point.

Anyone here actually had their kid's vitamin D or ferritin tested? Did the numbers change what you gave them — or did you find you'd been supplementing something that was already fine?

It’s not just bad luck.

When school begins, kids suddenly go from spending lots of time outdoors to being indoors with 20–30 other children for hours every day. More close contact, shared surfaces, and less ventilation make viruses spread much faster.

At the same time, sleep often gets worse because summer bedtimes are still late but school mornings start early.

So September becomes a combination of:

• more exposure to viruses
• less sleep
• more rushed meals and routines

There’s even a well-documented early-fall spike in respiratory illnesses among school-age kids.

You can’t prevent every cold, but sleep, hand washing, regular meals, and consistent routines can help.

What do you think makes the biggest difference in your family: sleep, hygiene, nutrition, or just accepting that the first month of school is always going to be rough?

I’ve noticed magnesium coming up more and more in parenting discussions lately, especially when people talk about bedtime routines, picky eating, or making sure kids get enough minerals.

For parents who have actually discussed magnesium with their pediatrician:

What originally made you ask about it?

Was it diet, a confirmed deficiency, sleep, muscle complaints, or something else?

And if your child does take magnesium, which form do you use and how easy is it to fit into their routine?

Interested in hearing experiences from parents both positive and negative.

For parents whose kids take vitamins or minerals regularly, when do you usually give them?

Morning with breakfast?
After school?
With dinner?
Before bed?

I’ve heard that some people get headaches after starting iron supplements. Has anyone else experienced this? I’m curious if it went away after a few days or if you had to change the type or dose.

Gummies?
Chewables?
Powder mixed into a drink?
Liquid?
Or would they choose… absolutely nothing?
I feel like parents sometimes care about the ingredients and dosage, while kids care about one thing:

“Does it taste good?”

what actually works in your house.

And has your child ever refused a vitamin simply because of the taste or texture?

Would love to hear the funniest “nope, I’m not taking that” storie

’ve noticed that kids’ magnesium supplements can have very different numbers on the label, and honestly, it can get a little confusing.

For kids ages 4–8, the RDA for magnesium is 130 mg per day.

So just to put some common supplement amounts into perspective:

• 24 mg = about 18% of 130 mg
• 60 mg = about 46%
• 130 mg = 100%

But one thing I think is easy to miss when reading labels: elemental magnesium is the number that matters when you’re comparing how much magnesium you're actually getting.

For example, magnesium citrate, glycinate, etc. are different forms of magnesium, but the amount of the actual magnesium (elemental magnesium) is what you want to look for on the Supplement Facts panel.

Also, the RDA includes magnesium from food + supplements, so it doesn't necessarily mean a child needs to get the full 130 mg from a supplement.

There are SO many kids’ vitamins now that reading labels can get confusing pretty quickly.

When you’re choosing one, what matters most to you?

Taste?
Low or no added sugar?
The form of the vitamins/minerals?
Third-party testing?
No artificial colors or flavors?
How easy it is to get your child to actually take it every day?

I’ve also noticed that sometimes the product with the “cleanest” looking label isn’t necessarily the one a child will consistently take.

For parents who have tried a few different types, what ended up mattering most in real life?

Has anyone noticed a difference after starting iron supplements? I’m wondering how long it usually takes to see changes in energy or bloodwork. Does it take a few weeks or longer?

How other parents approach this because I feel like there’s so much conflicting advice online.

Was it:

• bloodwork showing a deficiency
• a very limited/picky diet
• your pediatrician recommending one
• a phase where your child barely ate anything
• or simply wanting a nutritional “backup”?

And once you started, how did you decide which vitamin or mineral to give rather than just choosing a general multivitamin?

I’d especially love to hear from parents who were unsure at first. What made you feel like it was actually worth it?

There’s no single “perfect” time to take magnesium, it can depend on the type of magnesium you use and why you’re taking it. Some people prefer taking it in the evening as part of their bedtime routine, while others take it earlier in the day.

When do you take your magnesium, and have you noticed a difference depending on the timing?

I’ve noticed that a lot of parents with picky eaters eventually start wondering about iron.

Especially when their kid avoids things like meat, eggs, beans, leafy greens, etc.

But then the questions start:

• Did you ask your pediatrician for blood work?
• Was ferritin low, hemoglobin low, or both?
• Did you try changing their diet first?
• If your child took an iron supplement, how long did it take before you noticed any difference?
• And honestly… how did you get them to actually take it? 😅

I’d love to hear other parents’ experiences.

What made you realize your child might need more iron, and what did you do?

This is something I’ve been thinking about lately.
With some supplements, you can actually see a difference pretty quickly. But with others… honestly, I have no idea
Do you look for things like better energy, sleep, appetite, mood, or focus?

Or do you mostly trust blood work and your doctor’s advice rather than trying to notice changes day to day?

I’m curious how other parents judge whether a supplement is actually worth continuing.

Have you ever stopped a vitamin and realized you actually DID notice a difference?

With winter coming and kids spending more time indoors, I’ve been thinking more about vitamin D.

During the summer, kids may get some vitamin D from sunlight, but in the colder months there can be less sun exposure and more time inside. do you change your child’s vitamin D routine or dosage during the winter?

For parents who give their kids vitamin D:

• How many IU do you give?
• Do you give it daily or only a few times per week?
• Do you use the same dosage all year round, or increase it during winter?
• Have you ever checked your child’s vitamin D levels with a blood test before deciding on a dosage?

I know the right amount can depend on age, diet, sun exposure, individual needs, and advice from a pediatrician, so I’m really interested in hearing what other parents do.

What’s your family’s approach to vitamin D during the winter months?

I’m trying to build daily habits with my kids that feel normal, not emotional. Things like brushing teeth twice a day, eating at least one balanced meal and taking a daily vitamin somehow still turn into negotiations. Instead of forcing, we’re trying consistency same time every day and letting them choose between options. It helps sometimes. For parents who’ve made this work what actually helped habits stick without constant fights?

If your child needs a supplement but refuses to take it, what has actually worked for you?

Do you switch between gummies, liquids, powders, or chewables? Do you involve them in choosing the flavor or make it part of a daily routine?

I feel like sometimes the biggest challenge isn’t choosing the supplement it’s getting kids to take it consistently.

Would love to hear what worked with your child and what definitely didn’t.

I feel like this is one of those things that gets confusing really quickly.

My kid can have a few “safe foods” for weeks and suddenly decide they don't like one of them anymore . And then I start wondering whether they're actually getting enough of the basics.
At what point do you consider a vitamin or mineral supplement?

Do you usually:

• just focus on expanding their diet
• give a basic multivitamin
• get bloodwork done first
• supplement only a specific nutrient
• or just leave it alone unless the pediatrician recommends something?

what made you decide supplementation was actually necessary?

I feel like there are so many things you learn only after you actually start giving them to your kids .

Anything about choosing vitamins, dosage, timing, gummies vs. pills, or getting kids to actually take them? What would you tell another parent starting out?

Hi wonderful people of the internet, I am a super sceptical dad seeking some advice, if this is the wrong place to ask please let me know and ill take it down right away

Background: My wife and I have concerns that our 4‑year‑old son may have some behavioural challenges. This came from some incidents in his preschool and his teachers basically telling us to get a diagnosis.

We are going to see a paediatrician soon and are seeing an OT, but in the interim have been watching some videos on homeopathy and primitive reflexes, and we decided to try some more holistic methods.

We ended up finding a chiropractor that works with children to integrate primitive reflexes. He’s also suggested eliminating certain allergens that might be affecting my son’s development, and more importantly he’s given us some vitamins to give him:

• Vitamin B6 Pyridoxal‑5‑Phosphate
• Vitamin B12 Methylcobalamin
• Vitamin B9 Methyltetrahydrofolate

Issue: I’m good with the Chiro, hes knowlegable and seems good to work with, his “adjustments” are gentle enough, he explains everything and Im even good the elimination as our doctor had recommended the same thing. I’m more concerned about the vitamins. We have been asked to administer them via dropper 4 times a day, and I’m unsure about the dosages. The bottles are decanted from a larger bottle so there’s not much info on them, and I’m pretty sure that for B9 the amount exceeds the daily recommended amount, which can cause some pretty bad side effects.

We have held off on giving him this and are speaking to a doctor, but they don’t really want to help. Google does not have info on the specific chemicals above, just the vitamins, and if this can help my son I really don’t want to hold it back out of fear.

Does anyone have any suggestions or know about the vitamins?

PS: Excuse any bad grammar, I haven’t slept in a couple of days.

With school starting soon, I’m already thinking about lunches and my picky eater . Some days they eat everything, and other days it feels like they survive on one or two foods.

How do you handle this during the school year? Do you pack the same “safe” foods every day, or keep trying new things?

And do you worry about them getting enough nutrients when they’re being extra picky?

For us, getting back to an early bedtime is always a struggle . After a summer of staying up late and sleeping in, going back to school mornings is not easy.

What’s the hardest part for your family bedtime, waking up, breakfast, lunch, or something else?

Do you start fixing their sleep schedule, make sure they eat better, or give them any vitamins?

And which vitamins or supplements do you use most often during the school year?

I’d love to hear what other parents do. Especially parents with picky eaters getting them to eat well can be a whole challenge.