Kids calcium supplement, 2-week test: The Day Cal-Mag-D Plus K2

In short

The Day Tunteun Kids Cal-Mag-D Plus K2 is a children’s calcium stick supplement from Korea. After about 2 weeks of giving one packet after breakfast to a growing child, the taste was well accepted and the routine was easy. Verdict: a convenient one-packet morning option.

The Day Cal-Mag-D product shown with raw-material information

Good to know

Product
The Day Tunteun Kids Cal-Mag-D Plus K2 Strawberry Flavor
Test period
About 2 weeks
How it was taken
One stick pack after breakfast each day for a growing child
Format
Stick pack taken with water
Ingredients mentioned
Calcium, magnesium, vitamin D3, and vitamin K2

Prices as written by the tester on Feb 22, 2026 · not updated automatically

Why did I choose it as a supplement for a growing child?

It wasn’t easy to make sure my child got every nutrient they needed through meals every day. After hearing from our pediatrician that calcium intake could be insufficient through food alone, I compared several products and chose The Day Cal-Mag-D Plus K2.

The Day Cal-Mag-D Plus K2 chosen for a growing child
The Day Cal-Mag-D Plus K2 chosen as a children’s supplement

How did I manage one packet a day?

This product is described as putting calcium, magnesium, vitamin D3, and vitamin K2 into one packet. I used to end up negotiating with my child when it came to taking several pills separately, so having one packet at a time was convenient. I gave it after breakfast, and it didn’t feel like a burden even during busy school-morning preparations.

What did I look at in the ingredients and raw materials?

I looked at the calcium-to-magnesium ratio. The product description says the two are blended at a 2:1 ratio, and I also considered the ingredients included alongside calcium when choosing it.

The Day Cal-Mag-D product showing its calcium and magnesium blend
The Day Cal-Mag-D Plus K2 with its ingredient composition reviewed

Since this was a product for a growing child, I also paid close attention to the ingredient information. The product introduction’s statement that its main ingredients were blended at a premium grade influenced my choice.

What form of vitamin K2 does it use?

It was introduced as using vitamin K2 in the trans MK-7 form. I was impressed that it explained not just the ingredient name but also the form of the raw material.

The Day Cal-Mag-D product showing vitamin K2 ingredient information
The Day Cal-Mag-D Plus K2 with its raw-material form reviewed
The Day Cal-Mag-D Plus K2 introducing vitamin K2
The Day Cal-Mag-D product shown with raw-material information

Did the country of origin affect my choice?

The product description explicitly states that it does not use ingredients from Japan or China. I tend to check where ingredients come from too, so that information influenced my final choice.

Did my child take it well for about 2 weeks?

I gave it to my child consistently for about 2 weeks. The stick-pack format made it easy to take with water, and my child had no resistance to the taste and took it well.

The Day Cal-Mag-D introduced alongside a child’s experience taking it
The Day Cal-Mag-D stick pack given to a growing child
The Day Cal-Mag-D Plus K2 supplement taken daily

Because I only had to take out one packet each day, it didn’t take long to establish the habit of taking a supplement. What felt especially convenient during this trial was that my child accepted the taste well and that the daily routine was simple.

The Day Cal-Mag-D product included in a child’s supplement routine
The Day Cal-Mag-D Plus K2 introduced with impressions after taking it

How was it when managing several supplements separately felt cumbersome?

For me, someone who found it cumbersome to split up several pills, the one-packet format with its ingredients together was a good fit. I also looked over the ingredient information when choosing it, but the benefit I noticed most while actually giving it was how easy it was to manage one packet every morning.

The Day Cal-Mag-D product given one packet a day

Where to buy

더데이 · The Day Tunteun Kids Cal-Mag-D Plus K2 Strawberry Flavor stick packs더데이 튼튼키즈 칼마디 플러스 K2 딸기맛Prices as written by the tester on Feb 22, 2026 · not updated automatically
Tested
약 2주, 아침 식사 후 하루 1포
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