August arrives and the question comes with it. People want to pause the D and keep the rest. A multinutrient is one scoop. You cannot take the D out for six weeks and leave the magnesium.
We live in Portugal. July here is not July in Cork. A desk week in August is not a beach week. The calendar is a weak lab.
The short answer
- Skin can make vitamin D from UVB in high summer, if some skin is actually out. How much depends on latitude, hour, clothes, and skin tone.
- EFSA's 15 µg a day from age 1 was set assuming almost no sun. It is a cautious population figure, not a photograph of Faro in July.
- UK winter advice is not Portuguese or Spanish summer law. SNS 24 and Spain's Ministry of Health do not copy a northern leaflet.
- Pocket Kids carries 25 µg. Teens and Adults 35 µg. There is no summer version.
- If a household in Faro or Valencia wants to rely on skin in July, this product is the wrong tool for a two-month pause. Stop the pouch, or keep it.
UVB is not one sky
Vitamin D from the skin needs UVB. How much you make depends on latitude, season, time of day, clouds, clothes, sunscreen, and skin tone.
In Ireland and the UK, the NHS says most people can make what they need from ordinary time outdoors from late March or April through September, uncovered arms and face, without burning. It also says to consider a daily 10 µg through the year if you are rarely outside, cover up, or have dark skin. That is UK public advice. It is not EU law.
Portugal in July at noon, with arms and legs out, is a different calculation. A winter in Lisbon is not a winter in Galway either. None of that is an argument for more sun on a child. Sun protection does not get rewritten for vitamin D.
A desk week in August is not a beach week. Hats at noon still exist in Faro. "We live in the south, so we can stop" is only half a sentence. The other half is whether anyone got sun on skin.
What EFSA's 15 µg actually assumes
When European food-safety people set a daily intake for a healthy population that does not get much sun, they used a blood marker of 50 nmol/L as the thing they were aiming at for most people, and from that they got 15 µg a day from age 1. That is EFSA's 2016 opinion. It is an intake for a population. It does not know whether you live in Porto, Valencia, or Cork.
The long-term upper intake is 100 µg a day for adults and for children from 11, and 50 µg from 1 to 10 (EFSA, 2023). Those ceilings are why two sources in July can still add up, and why we will not describe high-dose summer courses on a blog.
Vitamin D is needed for normal growth and development of bone in children. It contributes to the maintenance of normal bones. Those are the authorised wordings. There is no authorised wording that links vitamin D to sleep. If that is the search, the page is Does vitamin D help you sleep?. The thesis there is that the Register does not allow that claim. A clinic paper is not a summer protocol.
The age table, the IU conversion, and how 500% can mean 25 µg are here.
National advice is not interchangeable
In Portugal, SNS 24 notes that vitamin D also comes from food and from supplements, and that a daily supplement of 400 IU (10 µg) is advised in the first year of life. From age 1, the public page points to food, and to ordinary time outdoors. The clinical rule for confirmed low results is a separate DGS document, and a doctor owns it.
In Spain, the Ministry of Health has said that population-wide vitamin D screening is not advised, and that supplementation belongs under clinical criteria, not as a general habit copied from a blog.
A summer pause that starts from a 25-hydroxyvitamin D result is a conversation with a GP. A summer pause that starts from a month name, or from a podcast number, is guessing.
Labs print vitamin D in nmol/L or ng/ml. Same blood. You multiply ng/ml by 2.5 to get nmol/L. 50 nmol/L is 20 ng/ml. If a printout looks "high" or "low" next to a blog number from another country, check the unit before you do anything else. Then take the printout to the person who ordered it.
The pouch cannot split
There is no summer version. There is no way to skip the D and keep the rest. If you pause a daily powder, pause the whole thing. Do not keep a second D-only bottle "just in case" and then restart both without adding them up.
If you keep it through summer, still add any D drops already in the house. Two modest sources in July can still climb toward 50 µg.
Food is modest in any season: oily fish, egg yolk, some fortified cereals and plant drinks. A normal plate is a fraction of 15 µg. High summer sun, when it actually reaches skin, is the large variable. Dinner is not.
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Where My Daily Pocket fits
| Formula | Vitamin D3 in one scoop | Who it is for | Who it is not for |
|---|---|---|---|
| Pocket Kids (4–11) | 25 µg | A daily multinutrient for that age, if you are keeping the whole scoop | A two-month summer pause of D only. Infants. A high-dose course. |
| Pocket Teens (12–17) | 35 µg | Same idea, teen amounts | The same three. |
| Pocket Adults (18+) | 35 µg | Same idea, adult amounts | A D-only summer product. Pregnancy as prenatal care. |
25 µg is 500% of the adult NRV of 5 µg, and a little over EFSA's 15 µg adequate intake. 35 µg is 700% of that same 5 µg ruler. The percentage is loud. The micrograms are the ones to add up against any drops already in the house.
If the week is genuinely outdoor, the sky is actually high-summer, and nobody has asked for a supplement, keep your money. If you want to pause D and keep magnesium, this pouch is the wrong tool. We still have no iron and no omega-3. A scoop is not a meal, and it is not a weather app.
Pairing D with K2 is a formula choice, not a summer rule. That page is here.
FAQ
Should I stop vitamin D in summer?
It depends on the sky you actually have, and on whether anyone got sun on skin. Lisbon in July is not Cork in July. A desk week is not a beach week. A blood test beats the month name.
Can I take the D out of a multinutrient for August?
No. One scoop is one scoop. Stop the pouch, or keep it.
Is EFSA's 15 µg a summer figure?
It was set assuming little sun. It is cautious on purpose. It is not a photograph of your holiday.
Does vitamin D in summer help me sleep?
There is no authorised EU claim that links vitamin D to sleep. We will not write one.
How much is in Pocket Kids?
25 µg of vitamin D3. Teens and Adults: 35 µg. Add any other D in the house. The ceiling to age 10 is 50 µg from everything.
Sources
- EFSA, dietary reference values for vitamin D, 2016
- EFSA, tolerable upper intake level for vitamin D, 2023
- EU Register of nutrition and health claims
- NHS, vitamin D
- SNS 24, Vitamina D
- Ministerio de Sanidad, vitamin D recommendations, 2025
- How much vitamin D does a child need?
- Does vitamin D help you sleep?
- Why vitamin D is sold with K2
About the authors
Lina is a co-founder of My Daily Pocket and is certified in nutrition. Stanislava is a co-founder. They write the Knowledge Hub together.
Last reviewed: 14 October 2026.
Food supplements should not replace a varied, balanced diet and a healthy lifestyle. No supplement is a substitute for a varied, balanced diet. Stay within the dose on the pack. This page does not replace a GP. If you are pregnant, on medicines, or a child has a medical condition, speak to a professional.
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