Formulation and Evaluation of a Poly-Herbal Under-Eye Cream: A Comprehensive Study on Natural Ingredients for Skin Care

The skin around the eyes is one of the most delicate and sensitive areas of the face, which is prone to signs of aging, puffiness, dark circles, fine lines, and dehydration. This region, with its thinner skin and reduced sebaceous activity, is highly vulnerable to oxidative stress and environmental damage, leading to visible skin issues that affect the appearance and health of the under-eye area. In recent years, there has been a significant shift towards using natural ingredients in cosmetic formulations, as consumers are increasingly seeking products that are free from synthetic chemicals and offer gentler alternatives. The use of plant-based ingredients, such as herbal extracts, in skincare products has gained popularity due to their proven benefits for skin health, safety, and efficacy. The under-eye cream presented in this study combines eight potent natural ingredients, including coffee, Terminalia chebula (haritaki), aloe vera, rose water, coconut oil, vitamin E, orange peel powder, and vetiver. Each of these ingredients was chosen based on its known therapeutic properties, and together they work synergistically to address common concerns associated with the under-eye region. Coffee extract is known for its ability to reduce puffiness and dark circles due to its vasoconstrictor effects and high caffeine content [1]. Haritaki, a prominent herb in Ayurvedic medicine, offers antioxidant and anti-inflammatory properties that aid in skin rejuvenation [2]. Aloe vera, with its moisturizing and soothing capabilities, is essential for keeping the skin hydrated and reducing irritation [3]. Coconut oil provides deep hydration and supports skin barrier function, while vitamin E offers antioxidant protection, enhancing skin repair and reducing oxidative stress [4]. Orange peel powder helps brighten the skin, and vetiver provides cooling and circulation-boosting effects [5, 6]. This combination of ingredients ensures a holistic approach to under-eye care, combining the wisdom of traditional botanical remedies with the benefits of modern pharmacognosy. This study aims to formulate a poly-herbal under-eye cream that not only addresses aesthetic concerns such as puffiness and dark circles but also supports long-term skin health. The formulation aims to provide a safe, effective, and natural alternative to synthetic under-eye creams, offering deep hydration, antioxidant protection, and anti-aging benefits, with a focus on sustainability and holistic care.

LITERATURE REVIEW

Herbal ingredients offer effective and natural solutions for under-eye care. Coffee, rich in caffeine and antioxidants like chlorogenic acid, reduces puffiness, dark circles, and signs of aging by improving circulation and protecting skin from oxidative stress [7]. Haritaki, with its antioxidant and anti-inflammatory properties, helps tighten skin and reduce fine lines [8]. Aloe vera provides deep hydration and accelerates wound healing, making it ideal for soothing the sensitive under-eye area [9]. Rose water offers gentle toning and anti-inflammatory effects, while coconut oil moisturizes and protects the skin barrier [10]. Vitamin E neutralizes free radicals, improving skin elasticity and reducing pigmentation [11]. Orange peel powder brightens the skin and promotes collagen synthesis [12], and vetiver boosts circulation and reduces irritation [13]. These synergistic ingredients make the formulation of a poly-herbal under-eye cream effective in addressing common concerns like puffiness, dark circles, and fine lines.

MATERIALS AND METHODS

Materials Used

The poly-herbal under-eye cream formulation was developed using the following raw materials and excipients:

Raw Materials:

• Coffee Seeds (Coffea arabica): A natural source of caffeine and chlorogenic acid, used for reducing puffiness and dark circles.
• Haritaki (Terminalia chebula): Known for its antioxidant and anti-inflammatory properties.
• Aloe Vera Gel (Aloe barbadensis miller): Provides hydration, soothing, and anti-inflammatory benefits.
• Orange Peel Powder (Citrus sinensis): Rich in vitamin C and flavonoids, brightens the skin and promotes collagen synthesis.
• Vetiver Root (Chrysopogon zizanioides): Known for its cooling and circulation-boosting properties.
• Vitamin E Capsules (Tocopherol): A powerful antioxidant that helps with skin repair and reduces oxidative stress.

Table 1: Raw materials and excipients used in the formulation

Excipients:

Table 2: Excipients used in the formulation

Glassware and Equipment:

• Beakers, sieves, muslin cloth, funnels, petri dishes, and a measuring cylinder were used for the preparation and extraction processes.
• Weighing balance, hot air oven, blender, and a burner were utilized during formulation preparation.

Formulation Process

The under-eye cream was prepared using an oil-in-water emulsion method, divided into phases:

1. Oil Phase (Phase I):
   • Stearic acid, cetyl alcohol, lanolin, and coconut oil were melted together. Propyl paraben was added and dissolved.
2. Aqueous Phase (Phase II):
   • Distilled water, methyl paraben, glycerin, and triethanolamine were heated and mixed.
3. Emulsion Formation:
   • The aqueous phase was gradually added to the oil phase with continuous stirring to form a smooth emulsion.
4. Addition of Extracts:
   • Coffee extract (5g), haritaki extract (5g), aloe vera gel (10ml), vitamin E (4ml), orange peel powder extract (5g), and vetiver extract (5g) were mixed into the emulsion, ensuring uniform dispersion.
5. Fragrance and Packaging:
   • Rose water (11.5ml) was added and gently stirred. The final cream was transferred to a sterile container and stored in an airtight glass jar.

Table 3: List of ingredients and excipients used in the poly-herbal under-eye cream formulation

Evaluation Methods

To ensure the quality and stability of the formulated cream, the following tests were conducted:

1. Organoleptic Evaluation:
   • Appearance: Semi-solid, light brown.
   • Odor: Characteristic.
   • Texture: Smooth and non-greasy.
2. Physical Evaluation:
   • pH: Measured using a digital pH meter.
   • Spreadability: Determined by the time it takes for two glass slides to separate with 250g weight.
   • Irritation Test: Patch test on forearm skin.
   • Stability: Photostability testing by exposing the cream to natural sunlight for 5 hours.
3. Microbiological Testing:
   • No microbial growth was observed in the cream after testing, indicating its suitability for therapeutic use.

By using a combination of these tests, the quality and stability of the under-eye cream were ensured.

RESULTS

The results of the evaluation tests conducted on the poly-herbal under-eye cream are summarized below, focusing on the key parameters including organoleptic evaluation, physical evaluation, stability, and microbiological testing.