Liposomal vitamin C: is it better absorbed?
Yes, a little, in small single-dose studies. More reached the blood than with plain vitamin C. But no study counted how much you then pee out. That missing number is the catch.
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Is liposomal vitamin C better absorbed?
A little, going by short tests. Liposomal vitamin C is vitamin C wrapped in tiny bubbles made of fats, called liposomes. They get in by a different route from plain vitamin C.
A 2025 review found 10 studies that compared the two. In 9, more reached the blood with liposomal. The peak was 1.2 to 5.4 times higher.
In one trial, 27 adults took 500mg once. Liposomal gave a 27% higher peak and 21% more over 24 hours.
| Question | What the 10 studies found |
|---|---|
| More vitamin C in your blood after one dose? | Yes, in 9 of 10. Peaks 1.2 to 5.4 times higher, with the biggest gaps in people who started low. |
| How much leaves in your pee? | Not measured in any study. |
| Does it do your body more good? | Only 2 studies looked. Little or no difference. |
| Higher levels after weeks of daily use? | Not tested. Blood was tracked for 4 to 24 hours. |
| Who paid? | Every study had company funding or company staff. |
Source: Carr 2025 review
Small, short and company-funded doesn’t make a result wrong. It does make it less certain.
So read “better absorbed” on a label as more in your blood for a few hours, not proven benefit.
Does more in your blood mean more for your body?
Not proven. The missing number is what ends up in your pee.
In 7 healthy volunteers, a single 200mg dose was fully absorbed.
From 500mg in one dose, less was absorbed and the extra came out in urine. Blood was fully topped up at 1,000mg a day.
Think of a bath with an overflow. Once it’s full, pouring faster won’t make it fuller. In healthy people who already have enough, extra vitamin C is quickly cleared by the kidneys.
The review says it’s uncertain whether the extra simply leaves in urine.
One study gave 4g. Liposomal beat plain on blood levels, and a drip into a vein beat both. Yet all three gave similar protection against damage from oxidation.
So before you pick a type, check whether food already fills your bath.
Is liposomal vitamin C worth it?
For most people, probably not. The NHS says you should be able to get all the vitamin C you need from your daily diet. Adults aged 19 to 64 need 40mg a day.
In healthy people, 100 to 200mg a day from food gives enough for full blood levels.
People living with obesity or diabetes, or having cancer treatment, tend to run lower and need more.
The biggest gaps, in people who started low, may be tissues soaking up plain vitamin C before it shows in blood. No one has tested whether liposomal tops up a low level faster over weeks.
In one of these groups? Ask your GP or a pharmacist whether you need a supplement at all. Then see do I need a multivitamin and supplements worth taking.
How much liposomal vitamin C should I take?
The same as plain: stay under 1,000mg. The NHS says less than 1,000mg a day from supplements is unlikely to cause any harm.
- Below 40 mgBelow the NHS daily need for adults.
- 40 up to 200 mgMeets the need. Up to 200mg in one dose is fully absorbed.
- Above 200 to just under 1000 mgFrom 500mg in one dose, less is absorbed.
- 1000 mg or aboveNHS: keep supplements under 1,000mg. More can upset your stomach.
Sources: NHS; Levine 1996
More than 1,000mg a day can cause stomach pain, diarrhoea and wind. These should stop once you stop the supplement.
In a big US study, men taking 1,000mg or more a day from supplements had a 19% higher risk of kidney stones. Women didn’t. This kind of study shows a link, not proof.
Have haemochromatosis, where your body stores too much iron? The NHS says avoid vitamin C supplements. See haemochromatosis symptoms and vitamin C and iron.
Before you take vitamin C, liposomal or plain
- Eat vitamin C foods every day: citrus fruit, peppers, strawberries, blackcurrants, broccoli, brussels sprouts or potatoes.
- Keep supplements under 1,000mg a day, adding up every product you take.
- Stop if you get stomach pain, diarrhoea or wind.
- Skip vitamin C supplements if you have haemochromatosis.
- Had kidney stones? Ask your GP before taking a vitamin C supplement.
- Read “better absorbed” as more in your blood for a few hours, not proven benefit.
Sources: NHS; NHS haemochromatosis; Ferraro 2016
Does liposomal vitamin C help colds?
No study has tested it for colds. The trials used plain vitamin C, and the effect was small.
The NHS says there’s little evidence that vitamin C prevents colds or helps you get better more quickly.
A Cochrane review, a big summary of trials, looked at daily doses of at least 200mg. In the general public, it barely changed how many colds people caught. It made adults’ colds about 8% shorter, so about half a day off a week-long cold.
Marathon runners, skiers and soldiers training in the cold had about half as many colds. Taking vitamin C only once a cold had started showed no clear effect.
If you want to try it, plain vitamin C is what those trials used.
When to speak to a GP
Scurvy, a severe lack of vitamin C, is rare. You’re more at risk if you eat no fresh fruit or veg for a while, or eat very little. Smoking raises it, and so does a drink or drug dependency that affects your diet, or a poor diet in pregnancy or breastfeeding.
- See a GP if you’re at risk and feel very tired and weak or low and irritable all the time, have joint, muscle or leg pain, or have wounds that reopen or are not healing well.
- Ask for an urgent GP appointment or call 111 if you’re at risk and bruise easily, have swollen or bleeding gums, joint or leg swelling, a high temperature or feel hot, cold or shivery, or yellow skin or whites of the eyes.
- Ask for an urgent GP appointment or call 111 if you think you have a kidney stone and are in severe pain, have a high temperature, or feel hot, cold or shivery.
- See a GP if stomach pain or diarrhoea doesn’t settle after you stop taking vitamin C.
Call 999 or go to A&E for a rash that doesn’t fade under a glass, a sudden severe headache or a stiff neck.
Do the same if light hurts your eyes, or for blurred or double vision. Slurred speech, weakness on one side, fits or passing out count too. So do severe chest pain, trouble breathing, confusion or drowsiness.