At BrightVits, we are passionate about creating gentle, effective supplements that work with the body – especially for families who care deeply about everyday wellbeing.
Vitamin C is one of the most widely used nutrients in the world. Yet many people are surprised to learn that how vitamin C is delivered can be just as important as how much you take.
In this article, we summarise independent scientific findings on liposomal vitamin C and explain what they mean in simple, parent-friendly terms.
Why vitamin C is important
Vitamin C (also called ascorbic acid) contributes to several essential functions in the body, including:
- supporting normal immune function
- contributing to collagen formation for skin, bones, teeth and blood vessels
- supporting normal nervous system function
- helping to reduce tiredness and fatigue
- helping protect cells from oxidative stress
These roles are recognised by public health authorities such as the National Institutes of Health and within authorised nutrition and health claims maintained by the European Commission.
Unlike some nutrients, vitamin C cannot be made by the human body. We must obtain it from food and, where needed, from supplements.
The challenge with traditional high-dose vitamin C
Many vitamin C supplements on the market contain high doses. While this may appear beneficial, two important limitations are well known.
1. The body can only absorb so much at once
Vitamin C is absorbed in the intestine using specific transport systems. These systems can become saturated, meaning that taking more vitamin C does not automatically result in more entering the bloodstream.
In simple terms, there is a practical limit to how much the body can take up in one go.
2. Digestive discomfort can occur
Vitamin C that is not absorbed remains in the gut. Because it draws water into the bowel, some people may experience bloating, stomach discomfort or diarrhoea, particularly at higher doses.
This is one of the main reasons researchers have explored alternative delivery methods such as liposomes.
What are liposomes – and why do they matter?
Liposomes are tiny, spherical capsules made from natural lipids similar to those that make up human cell membranes.
When vitamin C is enclosed inside a liposome:
- it is protected as it passes through the digestive system
- it has less direct contact with the gut lining
- it may access absorption pathways that bypass saturation limits
This combination can help reduce digestive irritation and support more efficient delivery into the bloodstream.
Multiple clinical studies have shown that liposomal vitamin C can lead to higher plasma levels than conventional oral vitamin C, indicating improved absorption.
How liposomal delivery may support absorption
Normally, vitamin C must rely mainly on specialised transporters in the gut to enter the body. These can become overloaded.
Liposomal vitamin C may be taken up differently. Because the vitamin is enclosed inside a lipid structure, it can interact more easily with the intestinal cell membrane and may pass through the gut lining in a less restricted way.
Some research also suggests that liposomes may enter circulation through lymphatic pathways, which may help more vitamin C reach the bloodstream.
Why scientists study bioavailability
When researchers assess supplements, they do not only look at the dose on the label.
They measure how much of a nutrient actually appears in the blood after ingestion.
This is known as bioavailability.
To do this, scientists commonly examine:
- the highest blood concentration reached after intake
- how long it takes to reach that peak
- how much of the nutrient remains in circulation over time
Together, these measurements help show how efficiently a nutrient is absorbed and used by the body.
What researchers investigated
A human bioavailability study carried out in collaboration with
Surya Research Clinics
compared several different vitamin C formats in healthy adults.
Participants were randomly assigned to receive the same amount of vitamin C, but in different forms, including:
- a liquid liposomal vitamin C
- another liquid liposomal formulation
- a powdered liposomal form
- a standard non-liposomal tablet
Blood samples were taken before supplementation and repeatedly over a 24-hour period to assess how vitamin C levels changed over time.
What the results showed
Across the tested formats, the liquid liposomal vitamin C demonstrated:
- higher peak levels of vitamin C in the bloodstream compared with non-liposomal and powdered forms
- a slower and more gradual rise in circulating vitamin C
- elevated levels that remained present for longer after a single dose
This pattern suggests that liposomal delivery may help vitamin C:
- overcome some intestinal transport limitations
- remain available to body tissues for a longer period
In contrast, conventional and powdered formats tended to peak more quickly and return to baseline levels sooner.
Why sustained availability matters
A slower rise and longer presence of vitamin C in the bloodstream may help support:
- more consistent delivery to body tissues
- simpler daily routines, without frequent re-dosing
- improved comfort for people sensitive to traditional high-dose tablets
For busy families, this can make everyday supplementation easier and more practical.
What this means for BrightVits families
At BrightVits, we choose liposomal delivery because it aligns with what parents consistently tell us they value most:
- gentle formulations
- efficient nutrient delivery
- simple daily routines
- science-led product design
While supplements should never replace a healthy and balanced diet, growing evidence shows that formulation technology can meaningfully influence how nutrients such as vitamin C are absorbed and used by the body.
Our approach is always to apply this science carefully, responsibly and transparently – with families at the heart of every decision.
References
1. National Institutes of Health (NIH) – Vitamin C Fact Sheet for Health Professionals
https://ods.od.nih.gov/factsheets/VitaminC-HealthProfessional/
(Authoritative source for vitamin C functions, requirements and safety)
2. European Commission – EU Register of authorised Vitamin C health claims
https://ec.europa.eu/food/safety/labelling-and-nutrition/nutrition-and-health-claims/eu-register_en
(Confirms the permitted health claims you reference in your blog)
3. Carr A.C. & Vissers M.C.M.
Scoping review of the bioavailability of liposomal compared with non-liposomal vitamin C.
PubMed, 2025.
https://pubmed.ncbi.nlm.nih.gov/40506693/
(High-quality review summarising multiple human studies on liposomal vitamin C)
4. Purpura M. et al.
Liposomal vitamin C enhances plasma and leukocyte vitamin C levels compared with non-liposomal vitamin C.
European Journal of Nutrition, 2024.
https://pmc.ncbi.nlm.nih.gov/articles/PMC11519160/
(Direct human study showing improved absorption with liposomal delivery)
5. Levine M. et al.
Vitamin C pharmacokinetics in healthy volunteers – evidence of saturable absorption.
PNAS, 1996.
https://www.pnas.org/doi/10.1073/pnas.93.8.3704
(Classic, widely cited study explaining why high doses are poorly absorbed)
