Since ancient times, seaweeds have been employed as source of highly bioactive secondary metabolites that could act as key medicinal components. Furthermore, research into the biological activity of certain seaweed compounds has progressed significantly, with an emphasis on their composition and application for human and animal nutrition. Seaweeds have many uses: they are consumed as fodder, and have been used in medicines, cosmetics, energy, fertilizers, and industrial agar and alginate biosynthesis. The beneficial effects of seaweed are mostly due to the presence of minerals, vitamins, phenols, polysaccharides, and sterols, as well as several other bioactive compounds. These compounds seem to have antioxidant, anti-inflammatory, anti-cancer, antimicrobial, and anti-diabetic activities. Recent advances and limitations for seaweed bioactive as a nutraceutical in terms of bioavailability are explored in order to better comprehend their therapeutic development. To further understand the mechanism of action of seaweed chemicals, more research is needed as is an investigation into their potential usage in pharmaceutical companies and other applications, with the ultimate objective of developing sustainable and healthier products. The objective of this review is to collect information about the role of seaweeds on nutritional, pharmacological, industrial, and biochemical applications, as well as their impact on human health.

/pdf/phytochemical-and-potential-properties-of-seaweeds-and-their-2kmnx5te.pdf

Phytochemical and Potential Properties of Seaweeds and Their Recent Applications: A Review

In recent years, there has been considerable interest in using microalgal lipids in the food, chemical, pharmaceutical, and cosmetic industries. Several microalgal species can accumulate appreciable lipid quantities and therefore are characterized as oleaginous. In cosmetic formulations, lipids and their derivatives are one of the main ingredients. Different lipid classes are great moisturizing, emollient, and softening agents, work as surfactants and emulsifiers, give consistence to products, are color and fragrance carriers, act as preservatives to maintain products integrity, and can be part of the molecules delivery system. In the past, chemicals have been widely used but today’s market and customers’ demands are oriented towards natural products. Microalgae are an extraordinary source of lipids and other many bioactive molecules. Scientists’ attention to microalgae cultivation for their industrial application is increasing. For the high costs associated, commercialization of microalgae and their products is still not very widespread. The possibility to use biomass for various industrial purposes could make microalgae more economically competitive.

Lipids from Microalgae for Cosmetic Applications

Until recently, the primary focus of photobiology has centered on the impact of UV radiation on skin health, including DNA damage and oncogenesis; however, the significant effects of visible light (VL) on skin remain grossly underreported. VL has been reported to cause erythema in individuals with light skin (Fitzpatrick skin types [FSTs] I-III) and pigmentary changes in individuals with dark skin types (FSTs IV-VI). These effects have importance in dermatologic diseases and potentially play a role in conditions aggravated by sun exposure, including phototoxicity in patients with FSTs I to III and post-inflammatory hyperpigmentation and melasma in patients with FSTs IV to VI. The induction of free radicals, leading to the generation of reactive species, is one driving mechanism of VL-induced skin pathologies, leading to the induction of melanogenesis and hyperpigmentation. Initial clinical studies have demonstrated the effectiveness of topical sunscreen with antioxidant combinations in inhibiting VL + UV-A1-induced erythema in FSTs I to III and reducing pigmentation in FSTs IV to VI. Antioxidants may help prevent the worsening of pigmentary disorders and can be incorporated into photoprotective strategies. It is essential that dermatologists and the public are aware of the impact of VL on skin, especially in patients with skin of color, and understand the available options for VL protection. 

http://www.jaad.org/article/S0190962221029893/pdf

Impact of visible light on skin health: The role of antioxidants and free radical quenchers in skin protection

Personal care products (PCPs) are generally used for personal hygiene, cleaning, grooming, and beautifcation. These include hair and skin care products, baby care products, UV  blocking creams, facial cleansers, insect repellents, perfumes, fragrances, soap, detergents, shampoos, conditioners, toothpaste, etc., thus exposing humans easily. Personal preferences related to PCPs usage frequency are highly variable and depend on socioeconomic status and lifestyle factors. The increasing availability and diversity of PCPs from the retailer outlets consequently result in higher loading of PCPs into wastewater systems and, therefore, the environment. These compounds persistently and continuously release biologically active and inactive ingredients in the atmosphere, biosphere, geosphere, and demonstrating adverse effects on human, wild, and marine life. Advanced techniques such as granular activated carbon fltration and algae-based system may help biotransformation and remove PCP contaminants from water with improved effciency. Additionally, harmony among PCPs related regulations of different countries may encourage standard checks to control their manufacturing, sale, and distribution across the borders to ensure consumers’ safety. Furthermore, all intended ingredients, their concentrations, and instructions for frequency of use as per age groups may be clearly labeled on packages of PCPs. In conclusion, the emerging environmental contaminants of PCPs and their association with the growing risks of negative effects on human health and globally on the environment emphasize the chemical-free simple lifestyle.

http://ijpr.sbmu.ac.ir/article_1101339_1f1da035dcdfae63e8fbe34a6fef6e7f.pdf

Environmental Distribution of Personal Care Products and Their Effects on Human Health

The exploitation of petrochemical hydrocarbons is compromising ecosystem and human health and biotechnological research is increasingly focusing on sustainable materials from plants and, to a lesser extent, microalgae. Fatty acid derivatives include, among others, oxylipins, hydroxy fatty acids, diols, alkenones, and wax esters. They can occur as storage lipids or cell wall components and possess, in some cases, striking cosmeceutical, pharmaceutical, and nutraceutical properties. In addition, long chain (>20) fatty acid derivatives mostly contain highly reduced methylenic carbons and exhibit a combustion enthalpy higher than that of C14-20 fatty acids, being potentially suitable as biofuel candidates. Finally, being the building blocks of cell wall components, some fatty acid derivatives might also be used as starters for the industrial synthesis of different polymers. Within this context, microalgae can be a promising source of fatty acid derivatives and, in contrast with terrestrial plants, do not require arable land neither clean water for their growth. Microalgal mass culturing for the extraction and the exploitation of fatty acid derivatives, along with products that are relevant in nutraceutics (e.g., polyunsaturated fatty acids), might contribute in increasing the viability of microalgal biotechnologies. This review explores fatty acids derivatives from microalgae with applications in the field of renewable energies, biomaterials and pharmaceuticals. Nannochloropsis spp. (Eustigmatophyceae, Heterokontophyta) are particularly interesting for biotechnological applications since they grow at faster rates than many other species and possess hydroxy fatty acids and aliphatic cell wall polymers.

/pdf/fatty-acids-derivatives-from-eukaryotic-microalgae-pathways-3fqep57xap.pdf

Fatty Acids Derivatives From Eukaryotic Microalgae, Pathways and Potential Applications.

Background Blue light is emitted visible light between the wavelengths of 400 to 500 nm. The main source of blue light is sunlight, but digital screens, light-emitting diodes (LEDs), and fluorescent lighting serve as additional sources. Concerns about the negative effects of blue light on the skin have rapidly increased over the past 15 years, and consequently, the urge to learn more about this topic is increasing as well. Aims Part I of this article provides up-to-date information on the definition of blue light and the negative and positive effects of blue light on the skin. Methods An Internet search was completed using the Google scholar database for relevant literature. Results Blue light can be both harmful and beneficial to the skin, depending on intensity and wavelength. Short-term safety information is more readily available from clinical studies; however, the biological effects of repeated and/or longer-term exposure are not fully understood yet. Conclusions Low-energy and low exposure times to high-energy blue light can help prevent skin diseases, while studies have revealed that longer exposure to high-energy blue light can increase the amount of DNA damage, cell and tissue death, and injury, eye damage, skin barrier damage, and photoaging.

Blue Light Protection, Part I-Effects of blue light on the skin.

Stroke: Molecular mechanisms and therapies: Update on recent developments

Background There are numerous cosmetic ingredients that have been identified to have blue light protection benefits. The urge to learn more about blue light protection claims has led to several substantiation test methods that can be utilized by companies to prove product efficacy. Aims Part II of this article provides up-to-date information on cosmetic ingredients that can provide protection from blue light, and methods companies can use to substantiate blue light protection claims. Methods An Internet search was completed using the Google Scholar database and a cosmetic ingredient supplier database (UL Prospector) for ingredients and relevant literature. Results Multiple ingredient categories, for example, algae-derived ingredients, UV filters, botanical extracts, antioxidants, and vitamins, are available on the market to fight against blue light-induced skin damage. There is not a formal standardized method to test for blue light protection; however, spectrophotometers, imaging devices, measuring oxidative stress, and visual evaluations are some of the methods being used today. Conclusions The number of ingredients launched for blue light protection and new methods developed to test products for blue light protection claims is expected to increase in the near future as we are learning more about the mechanism of damage that occurs in the skin upon blue light exposure.

Blue light protection, part II-Ingredients and performance testing methods.

OBJECTIVE Waxes are used as structuring agents in lipsticks. There are a variety of waxes combined in a single lipstick to provide good stability, pleasant texture and good pay-off. Due to a significant growth for natural, green and sustainable products, there is a constant search for alternatives to animal-derived and petroleum-derived ingredients. In this study, a green, non-animalderived wax, namely long-chain ketones (referred to as alkenones), sourced from marine microalgae was formulated into lipsticks and evaluated as a structuring agent. METHODS Alkenones were used as a substitute for microcrystalline wax, ozokerite and candelilla wax, typical structuring agents. In total, 384 lipsticks were formulated: L1 (control, no alkenones), L2 (alkenones as a substitute for ozokerite), L3 (alkenones as a substitute for microcrystalline wax) and L4 (alkenones as a substitute for candelilla wax). Products were tested for hardness (bending force), stiffness, firmness (needle penetration), pay-off (using a texture analyser and a consumer panel), friction, melting point and stability for 12 weeks at 25 and 45°C. RESULTS Alkenones influenced each characteristic evaluated. In general, lipsticks with alkenones (L2-L4) became softer and easier to bend compared to the control (L1). In terms of firmness, lipsticks were similar to the control, except for L4, which was significantly (P < 0.05) firmer. The effect on pay-off was not consistent. L2 and L3 had higher pay-off to skin and fabric than L1. In addition, L4 had the lowest amount transferred, but it still had the highest colour intensity on skin. Alkenones influenced friction (glide) positively; the average friction decreased for L2-L4. The lowest friction (i.e. best glide) was shown in L4. Melting point of the lipsticks was lower when alkenones were present. Overall, L4, containing 7% of 4 alkenones in combination with microcrystalline wax, ozokerite and carnauba wax, was found to have the most desirable attributes, including ease of bending, high level of firmness, low pay-off in terms of amount, high colour intensity on skin and low friction (i.e. better glide). Consumers preferred L4 the most overall. CONCLUSION Results of this study indicate that alkenones offer a sustainable, non-animal and non-petroleum-derived choice as a structuring agent for lipsticks.

https://onlinelibrary.wiley.com/doi/epdf/10.1111/ics.12597

Evaluation of alkenones, a renewably sourced, plant-derived wax as a structuring agent for lipsticks.

Continuous infusions of heparin and furosemide are often required for hospitalized patients to treat cardiac-related disease states. Concomitant infusion of heparin and furosemide through the same intravenous line minimizes the need for multiple intravenous sites. For concomitant infusions to be administered, knowledge of the physical compatibility for intravenous medications is imperative for patient safety and administering medications to maximize their effectiveness. Currently, heparin and furosemide are listed as Y-site compatible, but precipitation was reported at a large academic medical center, which questions this compatibility. This study investigated the in vitro physical compatibility of heparin sodium premix 25,000 units/250 mL in dextrose 5% water from two different manufacturers with furosemide 40 mg/4 mL at concentrations of 4:1 for heparin sodium and furosemide. The admixtures were prepared in triplicate using aseptic technique, stored at 19°C to 24°C and examined for visual precipitation, turbidity, and pH change at baseline, 1, 5, 8, 24, and 48 hours. Heparin sodium, B. Braun Medical Inc. or Hospira, Inc. solutions, and furosemide admixtures revealed changes over 48 hours. Changes in visual appearance, absorbance, and pH were observed at hour 5 compared to baseline for the B. Braun Medical Inc. admixture. The Hospira, Inc. admixture revealed visual changes by hour 48, but demonstrative changes in absorbance and pH did not occur. Our observations found demonstrative changes in physical compatibility in the admixtures of heparin sodium and furosemide at a ratio of 4:1. The findings suggest that a combination of the solutions in this study be avoided until further research is completed.

Intravenous Physical Compatibility of Heparin Sodium and Furosemide.

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