Formulation And Evaluation Of Polyherbal Memory Booster Syrup

Memory is a vital cognitive function underpinning learning, decision-making, and overall quality of life. With the rising prevalence of neurodegenerative disorders such as Alzheimer’s disease, dementia, and age-related cognitive decline, there is a pressing need for safe, effective, and affordable interventions. Conventional pharmacological treatments, though beneficial, often carry adverse effects, high costs, and limited accessibility (1, 2). Moreover, synthetic drugs typically act on single pathways, while cognitive decline is multifactorial, involving oxidative stress, neurotransmitter imbalance, neuroinflammation, and neuronal degeneration. This complexity highlights the potential of herbal medicine, which offers holistic, multi-targeted approaches with fewer side effects (3, 4). Traditional systems such as Ayurveda and Chinese medicine have long employed herbs to promote mental clarity and memory. Plants like Bacopa monnieri (Brahmi), Withania somnifera (Ashwagandha), Centella asiatica (Gotu Kola), and Ginkgo biloba are well-documented for their neuroprotective properties. These herbs act synergistically to enhance cholinergic transmission, reduce oxidative stress, modulate neurotransmitters, and improve cerebral blood flow. Unlike synthetic nootropics, herbal remedies combine multiple mechanisms, making them particularly suited for addressing complex cognitive impairments (5, 6). Polyherbalism—the practice of combining multiple herbs—is central to Ayurveda. The principle of synergy ensures that the combined effect of herbs exceeds their individual contributions, enhancing efficacy while minimizing toxicity. For memory enhancement, polyherbal formulations can integrate herbs with complementary actions, such as antioxidant activity, neuroprotection, and neurotransmitter modulation, resulting in a comprehensive cognitive booster (7, 8). Syrups are advantageous for patient compliance, especially among pediatric and geriatric populations. They are easy to administer, rapidly absorbed, and can be flavored for palatability. A polyherbal syrup ensures uniform distribution of active constituents, stability of phytochemicals, and convenience of dosing, making it an ideal vehicle for long-term cognitive support (9, 10). Formulating a polyherbal memory booster syrup requires careful selection of herbs based on ethnopharmacological evidence and neuropharmacological activity. Standardization ensures reproducibility and quality. Evaluation involves physicochemical analysis, phytochemical screening, stability studies, and biological activity assessments such as antioxidant potential and memory-enhancing effects in experimental models. This systematic approach validates traditional knowledge and provides scientific credibility. This study aims to formulate and evaluate a polyherbal memory booster syrup by:

• Selecting herbs with proven memory-enhancing properties.
• Developing a stable, palatable, standardized syrup.
• Evaluating physicochemical, phytochemical, and biological parameters.
• Validating its potential as a safe and effective cognitive enhancer.

The significance lies in bridging traditional knowledge with modern science, providing affordable interventions for cognitive health, and contributing to the growing evidence base for polyherbal formulations.

MATERIALS AND METHODS

1. Preparation of the Extracts using Cold Maceration Extraction

A known weight of each powdered plant material was placed in a clean, dry glass container. Methanol was added as the extraction solvent in sufficient volume to fully immerse the plant material. The mixture was sealed and kept at room temperature for 72 hours, with occasional stirring/shaking to enhance solvent contact. After maceration, the mixture was filtered through muslin cloth or Whatman filter paper to separate the solvent extract from plant residue. The filtrate (methanolic extract) was concentrated by rotary evaporation under reduced pressure at controlled temperature (below 40–45 °C). This step removes excess methanol while preserving thermolabile phytoconstituents. The concentrated extract was further dried (e.g., in a desiccator or lyophilizer) to obtain a solid crude extract. The dried extract was stored in airtight containers at low temperature to prevent degradation. Finally, the Percentage yield was calculated (11).

2. Formulation of Polyherbal Syrup (PHS)

Nine trial batches of polyherbal syrup were prepared to optimize palatability, stability, and uniformity of active constituents (Table 1). Each batch contained fixed amounts of methanolic extracts of Panax ginseng tuber (500 mg), Moringa oleifera leaves (500 mg), Beta vulgaris roots (500 mg), and Phyllanthus emblica fruits (500 mg) per 100 mL syrup. The excipients varied across batches to evaluate their influence on viscosity, sweetness, stability, and acceptability. Sucrose was used as the primary sweetening and viscosity agent, ranging from 40–60 g per 100 mL. Glycerin was incorporated (2–6 mL) to enhance smoothness and stability. Sodium benzoate (0.1–0.2 g) served as a preservative, while citric acid (0.05–0.15 g) adjusted pH and improved taste. Flavoring agents (0.5–1 mL) were added to mask bitterness, and purified water was used to make up the volume to 100 ml (12, 13).

Table 1: Formulation of Polyherbal Syrup (PHS)

3. Evaluation of the Polyherbal Syrup (PHS)

Each batch was evaluated for physicochemical parameters (pH, viscosity, specific gravity), organoleptic properties (taste, color, odor), and stability under accelerated conditions (14, 15).

RESULTS AND DISCUSSION

1. Percentage yield

The percentage yield of the methanolic extracts of Panax ginseng tuber, Moringa oleifera leaves, Beta vulgaris roots and Phyllanthus emblica fruits were found to be 47.25, 49.52, 50.24 and 49.22 %w/W, respectively.

2. Evaluation of the Polyherbal Syrup

2.1 Organoleptic Properties:

• Taste: Increasing sucrose and flavoring agents improved palatability. Batches 5 and 8 were rated highest in taste acceptability.
• Color: All syrups exhibited a reddish-brown hue due to beetroot and Phyllanthus emblica extracts. Batch 5 showed the most appealing uniform color.
• Odor: Mild herbal odor was present in all batches, masked effectively in formulations with higher flavoring agent concentrations (0.75–1 mL).

2.2 pH:

All batches showed pH values between 4.2–5.8 (Table 2), within the acceptable range for oral syrups. Batch 5 exhibited the most stable pH (5.2), indicating optimal acid balance with citric acid.

2.3 Viscosity:

Syrup viscosity increased proportionally with sucrose concentration (Table 2). Batches 4, 5, and 9 (55–60 g sucrose/100 mL) demonstrated higher viscosity, improving mouthfeel but slightly reducing pourability.

2.4 Density:

Values ranged from 1.18–1.23 g/mL, consistent with standard syrup formulations. Batch 5 and 8 maintained uniform density (Table 2).

Table 2: Physicochemical Parameters

2.5 Stability Study

The optimized formulation (PHS 5) was subjected to stability testing for three months as per ICH guidelines under two conditions:

• Long-term condition: 25° ± 2°C and 60% RH
• Accelerated condition: 35° ± 2°C and 70 ± 5% RH

Samples were withdrawn at 0, 1, 2, and 3 months and evaluated for physicochemical parameters (pH, viscosity, density), organoleptic properties (color, odor, taste), and physical stability (precipitation, phase separation). The results indicated that the formulation remained stable under both conditions. Minor variations in pH, viscosity, and density were observed but remained within acceptable limits. No significant changes in color, odor, or taste were noted, and no precipitation or microbial growth was detected. Under accelerated conditions, slight increases in viscosity and density were observed by the third month, but these changes did not affect product acceptability. Overall, the optimized batch demonstrated good stability, confirming its suitability for long-term storage (Table 3).