Key takeaways
- There's no best time of day to take vitamin C. Taking it consistently matters more.
- Vitamin C is water-soluble, so your body doesn't store large amounts; you need some every day.
- Taking it with a meal is gentler on sensitive stomachs.
- Vitamin C increases iron absorption, so taking it with an iron-rich meal can be useful.
In this guide
Morning or night?
Vitamin C doesn't have a “best” time of day. It's water-soluble, which means your body uses what it needs and gets rid of the excess in your urine rather than storing it.
The practical rule: pick a time you'll remember, such as with breakfast, and stick to it. Adults need 40mg a day, according to the NHS.
With food or without?
| With food | Empty stomach | |
|---|---|---|
| Comfort | Gentler, especially for acidic forms | May cause discomfort in sensitive people |
| Iron from the meal | Vitamin C increases iron absorption | No meal to pair with |
| Remembering | Easy to link to a regular meal | Easier to forget |
If high-dose vitamin C upsets your stomach, see our guide to gentle, non-acidic vitamin C.
Should you split the dose?
For everyday amounts, there's no need. If you take a high-dose product, splitting it between two meals can be easier on your stomach.
Don't overdo it: the NHS says taking more than 1,000mg a day can cause stomach pain, diarrhoea and wind. Add up the vitamin C in every product you take, including multivitamins and effervescent tablets.
Timing with other supplements
- Iron: taking vitamin C with iron-rich food or an iron supplement can be helpful, since vitamin C increases iron absorption. Follow any advice from your GP.
- Multivitamins: many already contain vitamin C, so check before doubling up.
- Medicines: ask your pharmacist if you take regular medication.
Vitamin C in Ramadan
Take vitamin C at iftar or suhoor, never during fasting hours. Taking it with food at either meal is the easiest way to remember and is gentlest on the stomach.
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Shop Bio-C →Questions people ask
Is it better to take vitamin C in the morning?
Not specifically. Choose any time you'll remember every day.
Can I take vitamin C at night?
Yes. Vitamin C doesn't keep you awake. If it upsets your stomach, take it with your evening meal.
Should vitamin C be taken with food?
It's not essential, but it's gentler on the stomach and lets you pair it with iron-rich foods.
Can I take vitamin C and zinc together?
Yes, they're often combined. Keep within the doses on the label.
How long does vitamin C stay in your body?
Excess vitamin C is removed in urine within hours, which is why a steady daily intake matters.
Sources: NHS: vitamin C · GB NHC register
This article is general information, not medical advice. Food supplements should not replace a varied, balanced diet and healthy lifestyle.
