The Study
Liposomal delivery enhances absorption of vitamin C into plasma and leukocytes: a double-blind, placebo-controlled, randomized trial
This study showed that when you take a special kind of vitamin C wrapped in tiny fat bubbles, your body absorbs more of it into your blood and immune cells than when you take regular vitamin C. But it doesn't prove that this makes you healthier or less likely to get sick—just that more vitamin C gets into your system.
Analysis score
Maximum 45 for a randomized controlled trial.
Where the score came from
This study tested if vitamin C wrapped in tiny fat bubbles (liposomes) gets absorbed better than regular vitamin C pills.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 545 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — higher levels in blood and immune cells mean the body gets more vitamin C where it’s needed, potentially boosting immune support.
- 2Liposomal vitamin C raised blood vitamin C levels 27% higher and immune cell levels 20% higher than regular vitamin C.
- 3Both were way higher than placebo.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
European Journal of Nutrition
Year
2024
Authors
M. Purpura, R. Jäger, Ashok Godavarthi, Dhananjaya Bhaskarachar, Grant M. Tinsley
Related Content
Claims (6)
The chemical structure of nutrients in supplements determines how much of the nutrient the body can absorb and use.
When healthy adults aged 18–45 take a 500 mg oral dose of liposomal vitamin C, their leukocyte vitamin C levels reach a peak 20% higher and maintain 8% greater total exposure over 24 hours compared to taking the same dose of standard vitamin C.
Liposomal vitamin C and regular vitamin C reach their highest levels in the blood at 4 hours after taking them, while a placebo reaches its highest level at 3 hours. This means the liposomal form does not slow down absorption but results in higher blood levels.
Taking one 500 mg vitamin C pill increases vitamin C levels in the blood and white blood cells by about 15 times compared to taking a placebo.
When healthy adults aged 18–45 take a 500 mg oral dose of liposomal vitamin C, their peak plasma concentration rises by 27% and their total plasma exposure over 24 hours increases by 21% compared to taking the same dose of standard vitamin C.
Taking a placebo pill results in no measurable vitamin C in the blood or white blood cells, which shows that any increase in vitamin C after taking vitamin C supplements comes from the supplement itself and not from background levels or testing errors.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.