The present invention relates to cosmetic body compositions, particularly in the form of a body moisturizer, which comprise particles having encapsulated pigments which are capable of evening the body's skin tone, improving its overall appearance, providing a pantyhose effect, hydration, radiance and strengthening its barrier. It further refers to the cosmetic use and the cosmetic method of evening the skin tone.
The current concept of beauty sought by most people nowadays is that of a young skin without any spots or wrinkles. However, aging, sun exposure, stress and pollution cause the skin to undergo gradual changes, which characterize the signs of skin aging, particularly by reducing the tone evenness, appearance of spots, dryness, and the like.
The daily use of makeup in current days has directly influenced the need for the development of products containing functional active ingredients, providing treatment while masking imperfections of makeup skin.
Makeup and treatment products have been developed for the face, particularly those designated as “Blemish Balm Cream” or “BB cream” or antispot balm. In general, these products adapt to the various types of facial skin, especially the most sensitive ones, having lighter formula and unlike other products, further containing functional active ingredients that provide a more uniformly textured, revitalized skin and even younger skin over time.
However, availability of body products having these features is still limited.
Thus, there remains a need for multifunctional cosmetic compositions for the body skin which can mask imperfections and provide cosmetic treatment.
In one embodiment, a cosmetic body composition is provided. The cosmetic body composition may comprise at least one ingredient that provides essential nutrients to the skin; and at least one encapsulated pigment.
In another embodiment, a body moisturizer is provided. The body moisturizer may comprise the cosmetic body composition described herein and cosmetically acceptable excipients.
In yet another embodiment, a method of evening skin tone is provided. The method may comprise applying a cosmetically effective amount of the cosmetic body composition described herein to a body region in need thereof until the cosmetic body composition is absorbed by the skin.
The present invention refers to multifunctional cosmetic body compositions that are capable of evening the body skin tone, in addition to improving its overall appearance, promoting hydration, radiance, strengthening its barrier while not staining the clothes.
Thus, in a first aspect, the present invention relates to a cosmetic body composition comprising:
The ingredient that provides essential nutrients to the skin provides softness and vitality to the skin and can be selected from emollients, humectants, conditioners and/or antioxidants, being particularly C8-C10 triglyceride, C16-C18 triglyceride, tocopheryl acetate, squalene and/or glycerin. Said ingredient is present in an amount of from 0.1 to 20% by weight relative to the total weight of the composition.
Without any limitation, the C8-C10 triglyceride according to the present invention can be preferably selected from caprylic/capric triglyceride and the C16-C18 triglyceride can be selected from Olus oil (e.g., Cegesoft PS 6) or microalgae. These ingredients contribute to skin radiance.
In a preferred embodiment, the cosmetic body composition according to the present invention comprises a combination of ingredients to provide lasting nutrition, which ingredients consist of C8-C10 triglyceride, C16-C18 triglyceride, tocopheryl acetate, squalene and glycerin.
The encapsulated pigment according to the present invention, besides providing immediate pigmentation also promotes an even effect. Said ingredient may be selected from one or more of CI 77491, CI 77492, CI 77499 and/or CI 77891. Also, in a particular embodiment, the ingredient may further comprise cellulose acetate, ammonium methacrylate copolymer, magnesium stearate and/or propylene glycol stearate.
The encapsulated pigment is present in an amount of from 0.1 to 3% by weight relative to the total weight of the composition.
In a preferred embodiment, the cosmetic body composition according to the present invention comprises a mixture of three pigments CI 77491, CI 77492 and CI 77499, individually encapsulated with a second pigment CI 77891 and cellulose acetate, ammonium methacrylate copolymer, magnesium stearate and propylene glycol stearate. The mixture of pigment provides a composition that is suitable for skins of different tones.
In a second aspect, the present invention relates to a body moisturizer comprising the cosmetic body composition according to the present invention together with cosmetically acceptable excipients.
Cosmetically acceptable excipients may be selected from those known in the art, for example those cited in the CTFA—International Cosmetic Ingredient Dictionary, 16th edition, 2016.
In another aspect, the present invention further relates to the use of the cosmetic body composition as described herein in the manufacture of a body moisturizer useful to moisturize, strengthen the barrier and/or even the tone and radiance of the skin.
In yet another aspect, the present invention relates to the method of evening the skin tone which consists of applying on the body region in need thereof a cosmetically effective amount of the cosmetic composition according to the present invention until rupture of the pigment particles and absorption of the composition into the skin.
Among the main distinguishing features of the composition according to the present invention is the presence of encapsulated pigments which, upon application to the skin, rupture and transfer thereto a slight tone and easily perceived evenness that can also be considered as a “pantyhose” effect”, in addition to moisturizing the skin for up to 48 h which, in a particular embodiment, is provided by combining emollients such as squalane, which is also naturally produced by the skin, with a powerful humectant, i.e., glycerin. According to the present invention, “pantyhose effect” means masking of skin imperfections immediately after application of the product, as demonstrated by image analysis, being comparable to the effect of masking leg skin imperfections conferred by semi-transparent socks, also known as pantyhoses.
Emollients present in the cosmetic body composition according to the present invention further stimulate the strengthening of the skin barrier, that is, they reinforce the lipid cement naturally produced by the skin. The consequence of the interaction of said rich formulation with the skin is softness and nutrition, as well as radiance and evenness.
The following examples, without limitation, illustrate the compositions according to the present invention as well as their effects, as described herein.
Ricinus communis oil
This benefit was evaluated through an objective, noninvasive methodology designated corneometry, which assesses the amount of water aggregated to the skin surface upon use of the product by evaluating the change in capacitance generated by such water build-up. In this evaluation measurements were taken prior to application of the product in order to provide information on the baseline condition of the skin, and after 15 minutes, 2 hours, 8 hours, 24 hours, 30 hours and 48 hours after application in order to identify the hydration improvement conferred by the product on the skin both immediately after use and throughout the day. Applications are made on the forearm, which is a region less affected by external factors and being more protected from sun exposure.
The cosmetic body composition according to the present invention has shown significantly positive results at all times evaluated hence increasing the skin hydration level by up to 67.9%. According to the study protocol and procedures employed to evaluate the increase in skin hydration, the following conclusions were made:
This benefit was assessed using an objective, non-invasive methodology designated TEWL (“Transepidermal Water Loss”) with 27 volunteers aged 32 to 56 years, which method indicates the skin barrier integrity through measurements of transdermal water loss that represents one of the primary barrier functions, that is, in addition to preventing the entry of microorganisms, chemicals and various forms of radiation, it prevents the body from losing water and nutrients while maintaining the skin impervious, which is essential for the proper functioning of the organism. In this evaluation measurements were taken prior to application of the product in order to provide information on the baseline condition of the skin, and after 14 and 28 days of home use of the product.
Applications are made on the forearm, which is a region less affected by external factors and being more protected from sun exposure.
The table below shows the percentage of barrier strengthening provided by the cosmetic body composition according to the present invention, when comparing the baseline condition of the skin (prior to application thereof) as well as the percentage of volunteers in which this effect was observed.
According to the obtained results, the product under investigation applied on the volar forearm skin has conferred a significant skin barrier strengthening effect after 14 and 28 days of home use as compared to the control. The percent skin barrier strengthening values relative to the baseline skin condition and the control were 3.1% and 10.1% after 14 and 28 days of home use, respectively. 100% of the research participants have shown strengthened skin barrier after using the product under investigation at home.
According to the study protocol and procedures used to assess the skin barrier strengthening effect provided by applying the product under investigation on the forearm skin, it was found that:
This benefit was evaluated by an objective, noninvasive methodology consisting of performing color evaluations of high resolution digital photographs obtained with a digital camera in a software. Evaluations are based on high resolution digital photographs obtained under controlled conditions at the beginning of the study and after 15 minutes of the application of the product under investigation. Skin color evenness was calculated as the percentage reduction in skin color variation after application relative to baseline.
The cosmetic body composition according to the present invention has shown a significant increase of 11.6% sometimes reaching 13.7% in skin color evenness through optical masking after 15 minutes of application. In addition, 100% of the research participants have shown improvements in skin color evenness after 15 minutes of application of the product under investigation.
According to the study protocol and procedures employed to assess the optical masking provided by the product under investigation, the following conclusions were made:
This benefit has been assessed using an in vitro methodology consisting of using a “Byk-Gardner Spectro-Guide Sphere Gloss” spectrophotometer to assess the fabric color. In this methodology 10 samples of white, 100% cotton fabric are read with the spectrophotometer “Byk-Gardner Spectro-Guide Sphere Gloss” before application of the product so as to know the color condition of the fabric at baseline, after application and drying the product in a standardized environment at 55±5% relative humidity and 22±2° C. for 2 hours (initial reading) and after washing and drying (in a standardized environment at 55±5% relative humidity and 22±2° C. for 24 hours) under standardized conditions (final reading).
For determining stains on the fabric, it is considered whether or not the stain remains after washing using the CIE94 color system, where the color difference, designated ΔE*94, is considered as visually noticeable when it reaches values above 1.0.
It can be concluded that the product under investigation does not stain fabrics, as the washing procedure has removed the stain present on the fabric.
This benefit was assessed using a subjective methodology whereby 34 volunteers were asked to respond “yes” to “no” to questions made after 21 days of use of the product:
After 21 days using the product according to the present invention the following perceived efficacy results were obtained:
To assess the absence of sensations and signs of discomfort, safety evaluation tests were performed under the supervision of dermatologists. Safety of the product according to the present invention has been demonstrated by means of a study of acceptability in use and HRIPT.
Acceptability in use: this study aims to verify the acceptability of a topical cosmetic product by confirming the absence of adverse events and sensations of skin and eye discomfort (in the case of products intended for use on the face) when applied as recommended and accompanied by a dermatologist and ophthalmologist.
It consists of volunteers using the test product at home under real use conditions (the same condition as shown on the product packaging) in order to verify whether the product is well accepted by the volunteers' skin. Dermatological and opthalmic clinical evaluations are performed prior to the use of the test product (to verify the volunteer's initial skin and eye condition and whether he/she is able to participate in the study) and after 21 days of use to ensure that the product did not promote any changes on the skin and eye health.
As a result, the product was shown to be safe for use in humans on the area recommended by the manufacturer, causing no rash or sensitization reactions in the sample of volunteers analyzed herein, being declared as Dermatologically tested.
HRIPT: This study aims to demonstrate the absence of primary skin irritation, cumulative skin irritation and the potential of skin sensitization of the product under maximized conditions, taking into account the amount of product applied and the occlusion procedure (use of occlusive and semi-occlusive dressings) so as to capture possible feelings of discomfort and/or clinical signs that the product may have a cumulative effect on the skin, characterizing possible irritation and/or sensitization reactions.
As a result, the product can be deemed safe under the assessed conditions as it did not induce primary or cumulative skin irritation or skin sensitization in the study group.
From the teachings provided in the text and the examples presented herein the person skilled in the art will readily appreciate the advantages of the invention and will be able to propose variations and equivalent embodiment alternatives without departing from the scope of the invention as defined in the appended claims.
Number | Date | Country | Kind |
---|---|---|---|
BR102017010071-5 | May 2017 | BR | national |
The present application is a national phase entry of PCT/BR2017/050117, filed on May 7, 2018, the entire contents of which are hereby incorporated by reference in their entirety for all purposes.
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/BR2018/050150 | 5/7/2018 | WO | 00 |