Formulation Optimization and Evaluation of Vit.C Loaded Liposomes by Homogenisation Method

Vitamin C (L-ascorbic acid) is an essential water-soluble micronutrient in the fields of pharmaceutical and cosmetic science, prized for its antioxidant properties, involvement in collagen production, and promotion of wound healing. Although it is effective for addressing hyperpigmentation and photoaging, Vitamin C encounters notable formulation obstacles. It is very unstable, susceptible to quick oxidation when in contact with light or oxygen, and has low skin permeability because of its hydrophilic characteristics (1,2).

Ascorbic Acid

Traditional topical administration frequently struggles to penetrate the lipophilic stratum corneum, resulting in diminished clinical effectiveness. To address these obstacles, carriers utilizing nanotechnology—particularly liposomes—have developed as an enhanced delivery method. Liposomes are round phospholipid layers that can enclose both water-soluble and fat-soluble substances. Their biomimetic design improves skin absorption and safeguards the encapsulated Vitamin C from environmental deterioration (3).

Enclosing Vitamin C in liposomes protects it from oxidation while allowing for prolonged release and enhanced transdermal absorption relative to typical aqueous solutions. Although various preparation methods are available, the homogenization technique is typically favored for generating consistent, nanoscale vesicles with excellent stability. The effectiveness of these systems relies significantly on factors like lipid-to-cholesterol ratios and mechanical processing parameters.This research concentrates on the creation, refinement, and analysis of Vitamin C-encapsulated liposomes employing the homogenization technique.

Mechanism of liposomal drug delivery through skin

4. 1. MATERIALS & METHODS
5. Materials

1. Ascorbic Acid( Active)
2. Soya Lecithin( Phospholipid)
3. Cholesterol( Stabilizer)
4. Chloroform and Methanol( Analytical grade detergents)
5. Sodium Phosphate Monobasic
6. Sodium Phosphate Dibasic(Buffer reagents

List of Materials Used in Formulation

Formulation Design

• Optimization of Vitamin C Loaded Liposomes

Optimization of the liposomal phrasings was carried out by varying expression and process parameters similar as phospholipid attention, cholesterol attention, homogenization speed, homogenization time, and medicine- to- lipid rate. Different batches were prepared and estimated to determine the optimized expression with desirable physicochemical characteristics.( 15)

• Evaluation of Vitamin C Loaded Liposomes

The set liposomal phrasings were estimated for colorful physicochemical parameters including flyspeck size, zeta eventuality, ruse effectiveness, morphology, pH, density, and medicine content. In- vitro medicine release studies and stability studies were also performed to assess the performance and shelf- life of the optimized expression.( 16)

• Characterization of Optimized expression

The optimized Vitamin C loaded liposomal expression was further characterized for its physicochemical and morphological parcels to confirm its felicity for topical delivery. Parameters similar as flyspeck size, zeta eventuality, ruse effectiveness, and face morphology were anatomized using standard logical ways. The attained results were compared to elect the stylish optimized expression with enhanced stability, zniformity, and medicine release profile.( 17)

• Storehouse of Prepared expression

The set liposomal phrasings were stored in watertight glass holders under cooled conditions until farther use to maintain stability and help declination of Vitamin C.( 12,13)

Methodology:

3. RESULT & DISCUSSION

1. Physical Appearance and expression Optimization

The formulated Vitamin C loaded liposomes were estimated for their physical characteristics. The original batch prepared via high- speed shear homogenization displayed severe raging and phase separation. Upon optimizing the homogenisation system to ultrasonication, the optimized batch appeared as a livery, translucent to milky-white dissipation( 29). No visible summations or phase separation were observed, indicating a largely stable vesicular system.

Physical Appearance of final product

3.2 Percentage Yield

The practical yield of the set Vitamin C loaded liposomal phrasings was determined to estimate the effectiveness of the expression process and recovery of the final product. The chance yield of all set batches was set up to be satisfactory, indicating minimum loss of accoutrements during expression.

Observation Table:

1. 3. pH Measurement

The pH of the optimized expression was set up to be(7.44), which falls impeccably within the ideal physiologically compatible range for topical and dermal operation, icing no skin vexation occurs.

pH Dimension

1. 4. Vesicle Size and size distribution-

The vesicle size and size distribution of the set Vitamin C- loaded liposomal phrasings were determined. The average vesicle size of the phrasings was set up to be in the nanometric range, attesting the successful conformation of nanosized liposomes.

This size range is suitable for enhanced topical medicine delivery.

Observation Table

5. Polydispersity Index( PDI)

• Result

5. The polydispersity indicator of the set Vitamin C loaded liposomal phrasings was determined using Dynamic Light Scattering( DLS) to assess the uniformity of vesicle size distribution. The attained PDI values indicated a homogeneous dissipation with respectable uniformity among the vesicle population.

Observation Table

3.6 Zeta Potential

• Result

The zeta eventuality of the set Vitamin C loaded liposomal phrasings was measured to estimate the face charge and prognosticate the physical stability of vesicular dissipation. The attained zeta eventuality values indicated good electrostatic stabilization of the set liposomal phrasings.

Observation Table

3.7 Scanning Electron Microscopy(SEM)

• Result

Scanning Electron Microscopy(SEM) analysis was performed to examine the face morphology and structural characteristics of the set Vitamin C loaded liposomal vesicles. The

SEM images revealed that the vesicles were generally globular in shape with smooth face morphology and well- defined boundaries.

Observation

3.8 Entrapment Efficiency (%EE):

• Result

The ruse effectiveness of the set Vitamin C loaded liposomal phrasings was determined to estimate the quantum of medicine successfully reprised within the vesicles. The chance ruse effectiveness was measured using UV-Visible spectrophotometric analysis after separation of unentrapped medicine.

Observation Table

• 9. Drug Content
• Result

The total medicine content of the set Vitamin C loaded liposomal phrasings was determined using UV-Visible spectrophotometric analysis to insure invariant distribution of the medicine throughout the expression. The results indicated satisfactory objectification of Vitamin C in all set batches.

Observation Table

• 10. In- vitro Drug Release Study
• Result

The in- vitro medicine release study of the set Vitamin C loaded liposomal phrasings was performed using Franz prolixity cell outfit in phosphate buffer medium over a period of 24

hours. The accretive chance medicine release of each expression was determined at destined time intervals using UV-Visible spectrophotometric analysis.

• 11.  Stability Studies
• Result

Stability studies of the set Vitamin C loaded liposomal phrasings were carried out at 4 °C and 25 °C for 30 days to estimate the effect of storehouse conditions on expression stability.

The phrasings were periodically observed for physical appearance, vesicle size, pH, and medicine retention.

Observation Table