Meet the body’s needs
Vitamin C is essential. Correcting inadequate intake is a different goal from taking high doses after needs are met.
VITAMIN C · HUMAN ORAL RESEARCH
Vitamin C.
Essential nutrition.
Smarter questions.
Vitamin C supports collagen formation, normal immune function and iron absorption. Liposomal delivery asks a different question: can a particular formulation put more vitamin C into the bloodstream? That does not automatically mean better health outcomes.
Explore the findingsIngredient and research-formulation evidence. None of the cited studies tested a finished Neurogan product. Reviewed September 10, 2026.
FINDINGS
The evidence at a glance.
More circulating vitamin C
A tested liposomal preparation increased short-term blood exposure versus ordinary oral vitamin C in 11 adults.
Not a general disease shield
A large long-term vitamin C trial found no reduction in major cardiovascular events. It tested ordinary ascorbic acid, not liposomes.
STUDIES
Absorption and benefit are different endpoints.
01 / LIPOSOMAL DELIVERY / CROSSOVER TRIAL
A real absorption signal in a small study
Each person tried placebo, ordinary oral vitamin C, liposomal oral vitamin C and intravenous vitamin C on separate visits. The liposomal oral preparation produced more circulating vitamin C than the ordinary oral dose, but much less than intravenous delivery. [1]
Study details & what the result means
Visits were separated by at least seven days. Blood samples tracked vitamin C over four hours. Participants were predominantly women (9 of 11); mean age was 53 ± 2 years and BMI 34.1 ± 1.0 kg/m², reported as mean ± standard error.
The oral liposomal AUC was 10.3 ± 0.9 mg/dL·h versus 7.6 ± 0.4 for ordinary oral vitamin C and 3.1 ± 0.4 for placebo. These are reported means ± standard errors, not the range of individual responses. The liposomal versus ordinary comparison had p = 0.002.
After three hours, investigators used a blood-pressure cuff to temporarily stop forearm blood flow, then measured a blood marker of lipid oxidation after flow resumed. All vitamin C routes prevented the rise seen with placebo. Liposomal vitamin C was not superior on that oxidative-stress endpoint.
The study was acute, small and formulation-specific. There was no empty-liposome control. It did not test colds, skin appearance, wound healing, long-term disease risk or Neurogan’s capsules. A 4 g research dose is not a routine-use recommendation.
Vitamin C exposure during the four-hour test
012 mg/dL·h
01
Dose
The same 4 g of vitamin C via different delivery routes.
02
Blood exposure
Liposomal oral exceeded ordinary oral exposure.
03
Stress marker
No superior protection with liposomes on the measured TBARS response.
CLINICAL OUTCOMES
A large trial sets an important limit.
02 / CARDIOVASCULAR PREVENTION / NULL
Eight years without fewer major cardiovascular events
The Physicians’ Health Study II found no cardiovascular-prevention benefit from daily vitamin C in middle-aged and older male physicians. [2]
Study details & what the result means
This was a double-blind factorial trial: vitamin C was randomized separately from vitamin E, beta-carotene and a multivitamin. The primary cardiovascular endpoint was nonfatal myocardial infarction, nonfatal stroke or cardiovascular death.
The vitamin C hazard ratio for major cardiovascular events was 0.99 (95% CI 0.89 to 1.11; p = 0.91). A value of 1 means no difference. The confidence interval includes 1, so the trial did not establish a reduction.
Most participants did not have prior cardiovascular disease, and the population was not selected for vitamin C deficiency. This does not argue against adequate nutrition or treating deficiency. It also does not directly test liposomal vitamin C. Rather, it shows why an antioxidant role alone is insufficient evidence for a disease-prevention promise.
0.99
Hazard ratio for major cardiovascular events
95% confidence interval: 0.89 to 1.11. The interval includes no difference (1.00). Ordinary vitamin C versus placebo, not a liposomal trial. [2]
NUTRITION
Start with adequate intake, not the largest number.
Collagen
Vitamin C is required for normal collagen synthesis. That requirement does not establish that extra vitamin C improves wrinkles when intake is already adequate.
Immune function
Vitamin C supports normal immune function. NIH’s evidence summary does not support starting it after cold symptoms as a reliably effective way to shorten or reduce a cold.
Iron absorption
Vitamin C helps absorb nonheme iron from plant foods. People with iron-overload disorders should discuss high-dose use with a clinician.
For most adults, the U.S. recommended dietary allowance is 90 mg/day for men and 75 mg/day for women. Pregnancy and lactation have different requirements; people who smoke need an additional 35 mg/day. These are nutritional intake recommendations, not a dose-response curve for supplement benefits. [3]
PRODUCT COMPARISON
How the product compares with the research.
| Form | Amount / evidence | What carries over? |
|---|---|---|
| Current Supplement Facts image | Serving size: 2 capsules. Liposomal Vitamin C 1,000 mg, described as a vitamin C/phospholipid complex from sunflower. | The image does not separately quantify active ascorbic acid versus carrier mass. Do not equate 1,000 mg complex with 1,000 mg active vitamin C without clarification. |
| Product description | Says each capsule delivers 1,000 mg, while suggested use is two capsules. | This conflicts with the 1,000 mg per two-capsule facts image. The discrepancy should be resolved before choosing a dose. |
| Davis research formulation | 4 g vitamin C in an oral liposomal preparation; acute crossover experiment. | Not this capsule or delivery system. Neither an absorption multiplier nor superior tolerance is established for the Neurogan product. |
| PHS II formulation | 500 mg/day synthetic ascorbic acid. | Long-term disease endpoints, but not liposomal delivery. |
[4] Open the current Supplement Facts image. Label image reviewed September 10, 2026. A laboratory or formulation specification is needed to resolve the active-to-complex ratio.
SAFETY
Before you add it to your routine.
High vitamin C intakes can cause diarrhea, nausea and abdominal cramps. The U.S. adult tolerable upper intake level is 2,000 mg/day from all sources, not a target dose. Discuss supplementation if you have kidney disease, a kidney-stone history or hereditary hemochromatosis. People receiving chemotherapy or radiation should consult their oncology team before high-dose antioxidants. Do not use a complex’s total mass to calculate active vitamin C intake until its composition is clear. [3]
Does liposomal mean more effective?
Not necessarily. Some preparations produce more vitamin C in blood. The small trial here did not find better protection on its measured oxidative-stress endpoint. Clinical benefit must be tested separately.
Are phospholipids another active vitamin?
No. They are delivery-system components. Their mass is not the same as the amount of ascorbic acid, and the current product label does not split the two amounts.
Is the 4 g study dose a recommendation?
No. It was a supervised acute research dose above the adult daily upper intake level. It should not be copied into a routine simply because it appeared in a trial.
READ THE INGREDIENT. CHECK THE FORMULA.
Useful science keeps
the limits in view.
Human findings are most useful when the dose, preparation, population and outcome match the question you are asking.
SOURCES & ACCESS
Follow the evidence.
This is a focused research review, not an exhaustive systematic review. Primary studies are distinguished from reviews, safety guidance and manufacturer records. Source-access limits are noted rather than filled in with estimated results.
Davis et al. (2016). Liposomal-encapsulated ascorbic acid.
Primary full text. Reported AUC means and standard errors reviewed.
Read source 1 ↗Sesso et al. (2008). Physicians’ Health Study II.
Primary full text. Long-term randomized cardiovascular outcomes.
Read source 2 ↗NIH Office of Dietary Supplements. Vitamin C fact sheet.
Government nutrition and safety synthesis, not a single trial.
Read source 3 ↗Neurogan Health. Liposomal Vitamin C.
Live product record and Supplement Facts image. Description and label do not agree on per-capsule dose.
Read source 4 ↗