Cosmic Beauty: How Space Insights are Shaping Skin Care Innovations

Humans are currently exposed to unprecedented environmental pollution. Global carbon dioxide (CO₂) emissions reached 41.6 billion tons in 2024, a 2% increase over the previous year, with projections pointing to a cumulative growth of 43% by 2035.¹ These effects intensify ozone layer depletion and increase UV-B radiation exposure and climate change. This presents the challenge of developing cosmetic products to protect the skin and hair from the environmental effects associated with global warming. Additionally, the increase in fine particles (PM_2.5), tropospheric ozone and volatile organic compounds deteriorates the skin's structure, triggering oxidative stress, metalloproteinase activation, low-grade chronic inflammation, and stratum corneum dysfunction, leading to accelerated skin aging.²

Environmental changes are also reflected in consumer behavior. In 2022, the global sunscreen market was valued at US $11.37 billion and it is estimated to reach $16.2 billion by 2029, representing a compound annual growth rate (CAGR) of 5.3%.³ Mineral filters containing zinc oxide and/or titanium dioxide show differentiated growth with a projected CAGR of 8.5% between 2026 and 2033.⁴

The anti-pollution product market is growing at a compound annual growth rate (CAGR) of 7.1% from 2024 to 2030,⁵ driven by the development of antioxidant, chelating and repairing ingredients to combat urban environmental aggressors. In addition, products with claims for intensive hydration and thermal resistance have emerged in the functional skin care segment – which is expanding at a CAGR of 6.8% between 2025 and 2032.⁶ These trends reflect the cosmetic industry's adaptation to increasingly variable and aggressive environmental conditions.

For extreme conditions, space cosmetics were initially conceived to preserve skin integrity during orbital missions. Today, however, they are emerging as a source of functional innovation applicable to everyday life due to environmental changes. Technologies such as antioxidants tested under cosmic exposure, microgravity-encapsulated delivery systems, and radiation-resistant active ingredients will be a constant problem-solver in combating accelerated skin aging – and disruptive technological trends in cosmetics.

The conditions in space also accelerate alterations in skin phenomena that on Earth, are associated with skin aging: chronic xerosis, atopic skin or skin damaged by solar radiation. Therefore, the data obtained from studies conducted in astronauts could constitute a unique research model for innovation in cosmetic formulations – especially those aimed at mitigating collagen loss, improving epidermal hydration and restoring cutaneous immune function.

This article delves into these specialized cosmetics through three main themes: the space environment as an aggressor to the skin, the physiological adaptations of the skin in orbital conditions, and space cosmetics as an opportunity for the cosmetic industry. It also proposes space could be the new predictive model for cosmetic challenges humanity will face on Earth in the coming decades.

Space Environment Aggressors and Skin

Ionizing radiation: In space, astronauts are exposed to significantly higher levels of ionizing radiation than on Earth, including galactic cosmic rays (GCR) and solar energetic particles (SEP). Unlike the UV and visible radiation present on Earth, ionizing radiation has enough energy to knock electrons out of atoms, penetrate tissues and directly damage molecular structures such as DNA and cell membranes. Its interaction with the skin generates reactive oxygen species (ROS), triggering oxidative stress, chronic inflammation, collagen degradation and cellular mutations. This type of radiation, which is not filtered by the atmosphere or the Earth's magnetic field, represents one of the greatest dermatological risks in space.⁷

According to recent NASA data, a person on Earth receives approximately 2.4 mSv (millisieverts)  of radiation exposure per year from natural sources, while an astronaut on a six-month mission to the International Space Station (ISS) can accumulate between 50 and 120 mSv, depending on solar activity and the characteristics of the mission.⁸

On the other hand, current simulations of interplanetary missions indicate that a trip to Mars could involve a dose greater than 1,000 mSv, which poses a significant risk to exposed tissues such as the skin.⁹ This dose is greater than what an individual would receive living next to a microwave oven operating 24/7 for 300 years – but even then, the microwave would still be safer. These conditions of extreme and prolonged exposure could be used to optimize the prediction of skin damage caused by the sun.

Microgravity and zero gravity: Exposure to microgravity affects multiple key physiological processes in the skin. The redistribution of fluids to the upper part of the body can alter microcirculation and skin pressure, reducing hydration and promoting fluid retention in superficial layers. This condition alters dermal cell metabolism, reduces type I collagen synthesis, and causes changes in the structure and function of the extracellular matrix. The absence of gravity thereby impairs cell renewal and epidermal thickness – conditions that mimic phenomena associated with premature aging.¹⁰

Psychological stress – a neurocutaneous disruptor: The space environment also imposes constant psychological stress due to confinement, isolation, perceived risks and alterations in the circadian cycle. Recent studies have documented sustained increases in salivary cortisol and symptoms of anxiety, sleep disturbances and emotional distress in astronauts during prolonged missions.^{11, 12} This type of stress activates the hypothalamic-pituitary-adrenal (HPA) axis, raising levels of cortisol and other proinflammatory cytokines, which directly interferes with the skin's barrier function. In microgravity, this response is intensified due to sensory disruption and limited natural stimuli, compromising skin homeostasis and exacerbating disorders such as dermatitis, rosacea or pruritus.¹³

Closed environments and skin microbiota: The ISS is a closed, recycled and highly sterilized system with controlled air and little exposure to terrestrial microbial biodiversity. This condition affects the resident microbiota of the skin, reducing its diversity and allowing the proliferation of opportunistic strains. Changes in the bacterial composition of astronauts' skin have been identified during prolonged missions, with a decrease in commensal bacteria such as Staphylococcus epidermidis and an increase in resistant microorganisms. This dysbiosis compromises the skin's immune function and its ability to respond to external pathogens.¹⁴ Changes in the skin microbiota, in turn, impact the health of the skin.

Specialized formulation implications: The space environment thus requires the development of  cosmetic formulations specifically adapted to its unique conditions that not only counteract visible effects, but also proactively protect against physical and environmental aggressors in the orbital environment (see Table 1).

These factors also have parallels on Earth for which specialized formulations might be developed, including: occupational exposure to ionizing radiation in medical or industrial settings; chronic psychological stress in urban contexts; living in enclosed spaces with mechanical ventilation; or increased atmospheric pollutants and volatile compounds indoors that are also present in consumers' everyday lives.

How Skin Adaptations in Space Reflect Earthly Challenges

Beyond external assaults, in microgravity, astronauts experience internal physiological changes in their skin, including a rapid loss of elasticity, hydration, skin structure and immune homeostasis. These effects — induced by ionizing radiation, low relative humidity (< 10%), artificial circadian cycles, and pressurized atmospheres — accelerate the processes already observed in polluted or climatically altered terrestrial environments;^{11, 16} following are examples of related findings.

Decreased skin hydration, increased TEWL: Hydration in the stratum corneum decreases significantly during prolonged space missions. A reduction in hydration between 15% and 20%, as measured by corneometry, has been reported in astronauts after more than 90 days in microgravity.¹⁹ On Earth, extreme cases of hydration reductions of 35% to 42% have been found in patients with severe xerosis, compared to patients with healthy skin.²⁰ These examples of extreme dehydration represent an acute and multifactorial model of epidermal damage, useful for validating dermocosmetic strategies aimed at restoring barrier function under extreme conditions.

At the same time, in space, transepidermal water loss (TEWL) increases in exposed areas of the body.²¹ Increased TEWL disrupts the lipid barrier, rendering it vulnerable to penetration by irritants and allergens, and to inflammation. In a terrestrial comparison, pathologies such as active atopic dermatitis can reach TEWL levels of up to 12 g/m²/h,²² which gives us a comparative reference for the magnitude of skin deterioration induced by microgravity. Exposure to space conditions that alter the skin barrier thereby advocate for further investigations into the mechanisms of skin damage.

Changes in surface structure – flaking and roughness: During prolonged stays in microgravity, increased skin roughness, hyperkeratosis and a loss of surface uniformity has been observed, linked to a decrease in epidermal turnover and the accumulation of corneocytes. These alterations have been identified using non-invasive imaging technologies, uncovering morphological patterns comparable to photoaging. As a result, the epidermis observed in microgravity shows decreased radiance, an irregular surface and greater mechanical fragility.¹⁹

Loss of skin elasticity and firmness: The loss of skin elasticity and firmness has been captured using non-invasive imaging technologies^{a, b}, identifying morphological patterns comparable to photoaging. Prolonged exposure to microgravity shows an increase in skin roughness, hyperkeratosis, and loss of surface uniformity linked to a decrease in epidermal turnover and accumulation of corneocytes; so again, the epidermis in microgravity shows decreased radiance, an irregular surface and greater mechanical fragility.¹⁹

Ultrasonic scanning^b has revealed the formation of areas of low collagen density in the dermis, showing alterations in the extracellular matrix (visualization of hypoechoic areas). This ultrasound pattern is characteristic of skin damaged by radiation or chronic oxidative stress. Complementary studies link this loss of the extracellular matrix with a decrease in resident immune cells and the deterioration of dermal connective tissue.¹⁶

Altered skin immunity: Skin immunity is also altered by prolonged exposure to the space environment. Research by NASA GeneLab and collaborators has shown a decrease in the functionality of skin dendritic cells and a lower expression of regenerative interleukins, which could explain the slow healing, hyperreactivity to irritants and a higher incidence of minor skin lesions that occur during prolonged space flights.¹⁶

Space Cosmetics for the Present and Future

Inspired by these insights, space cosmetics are an innovative approach to protecting and maintaining skin health, where products must meet the rigorous requirements of the space environment.

Protection against radiation: Mineral active ingredients such as zinc oxide (ZnO) and titanium dioxide (TiO₂) nanoparticles are incorporated in products to act as physical shields, reflecting and scattering radiation. Recent studies have shown that these inorganic filters not only offer direct photoprotection, but also modulate skin signaling pathways involved in oxidative stress and extracellular matrix degradation, reinforcing their role in high-exposure environments such as space.²³ In addition, antioxidants such as resveratrol, vitamin C and glutathione are used to neutralize reactive oxygen species (ROS) generated by ionizing radiation. These compounds prevent lipid peroxidation and protect essential protein and nucleotide structures.

A prime example of space biotechnology applied to cosmetics is an ingredient obtained from the extremophile strain Bacillus pumilus SAFR-032^c. This strain was exposed to cosmic radiation and microgravity conditions aboard the ISS, where it developed unprecedented resistance to oxidative stress.

As a result, its bacterial lysate exhibits a unique ability to activate endogenous antioxidant defense pathways and protect the skin from radiation-induced damage. This technology, originally developed to protect human tissues in space, has been incorporated into an anti-aging line, establishing itself as a transdisciplinary innovation that demonstrates how the space environment can catalyze high-value developments in industry.^{24, 25}

Validation of efficacy in extraplanetary conditions: Microgravity offers a unique environment for studying cellular behavior under extreme stress conditions, allowing physiological phenomena to be observed at an accelerated rate and with greater sensitivity. Using rotary bioreactors developed by NASA, scientists have cultivated three-dimensional structures of human fibroblasts that more accurately mimic skin physiology.

The results obtained in space are unique due to the total absence of interaction variables such as sedimentation, shear and convection, which guarantees a more representative exchange between cells and compounds without these external variables. This methodology has allowed companies to validate the bioactivity of botanical extracts under extreme conditions, demonstrating their regenerative efficacy in an environment that acts as a biological amplifier of cellular responses.^{26, 27}

In addition, recent initiatives seek to analyze in situ the degradation and cellular aging of skin tissues in microgravity. The Skin Aging Experiment by PCA Skin and the ISS National Lab, for example, demonstrates how the absence of gravity affects the structure, metabolism and longevity of dermal tissues, revealing mechanisms of accelerated deterioration that allow for more sensitive testing of the efficacy of cosmetic active ingredients. This opens new avenues for the design of highly precise formulations.²⁸

Extraplanetary cultures to yield skin actives: To counteract transdermal water loss, advanced cell cultures have been developed in microgravity conditions, including plant stem cells derived from species such as Uttwiler Spätlauber (a Swiss apple variety) and edelweiss. Under these conditions, these species synthesize adaptive secondary metabolites, such as structural polysaccharides, glycoproteins and phenolic antioxidants. Space cultures growing in orbital bioreactors eliminate gravitational stress and simulate a three-dimensional floating environment, producing compounds with more concentrated and bioavailable biomolecular profiles.

The Naples Soap Company has begun to integrate ingredients derived from this research into its intensive care line for dry and mature skin, using extracts produced in microgravity aboard commercial missions to the ISS.²⁹ This approach, although technologically extrapolatable to Earth, is genuinely space-based due to the unprecedented environment that allows for the extraction of active ingredients of a quality and efficacy that are difficult to achieve under conventional gravitational conditions.

Interstellar postbiotics: Space cosmetics incorporate ingredients such as inulin, lactic acid and functional oligosaccharides that act as selective prebiotics to promote the growth of beneficial strains, even under conditions of extreme stress. A significant example is Bacillus pumilus SAFR-032, a strain discovered in NASA clean rooms and subsequently exposed to space conditions aboard the ISS. This bacterium demonstrated unusually high resistance to UV and cosmic radiation, as well as to desiccation, generating substantial interest in its derivatives. From this strain, postbiotics such as cell lysates and bioactive metabolites capable of modulating skin immunity, improving epidermal barrier resistance, and restoring microbiome diversity have been developed.²⁴

Orbital pragmatism – self-assembling polymers: Formulating cosmetics for the space station is a challenge for formulators and a necessity for astronauts. In this context, technologies based on self-assembling polymers are available, such as poloxamers capable of forming supramolecular nanostructures (micelles, vesicles and reversible gels) that form stable emulsions without the need for differentiated phases^d, allowing the delivery of cosmetic active ingredients through colloidal systems that do not require emulsifiers or emulsification energy. Their assembly is governed by thermodynamic interactions and not by gravitational factors. The emulsifier-free trend will be an opportunity for innovation in the cosmetics industry.

Containment systems: The development of pressurized containers with multidirectional valves, airless chambers and controlled dosing systems that prevent contamination and allow for uniform application in weightless conditions are also an opportunity for innovation.

Space manufacturing: Projects such as Spactory, the first automated space factory^e, dedicated to the production of advanced pharmaceutical and cosmetic compounds in orbital conditions, are differentiated. They use miniaturized systems^f and have successfully synthesized phytananoemulsions and nanogels directly on the ISS, taking advantage of microgravity to improve product stability and efficacy.^{30, 31}

In parallel, SpaceX has facilitated, through missions such as CRS-29, the transport and operation of biofabrication modules such as those of Space Tango, focused on the development of organoids, stem cells and high-value therapeutic applications in microgravity.³² These advances lay the groundwork for the future manufacture of functional cosmetics directly in orbit, with unique properties induced by space conditions.

Conclusions

Space exploration has provided a new perspective on skin aging, the development of cosmetic products, and the challenges facing the future of our planet and our well-being. As the orbital environment establishes itself as an extreme biological laboratory, its convergence with cosmetic science challenges the limits of conventional formulation and redefines our priorities in skin care.

Footnotes
^a Visioscan VC 98 and Visioline
^b DermaScan (20 MHz)
^c Bacillus Lysate is a product of Delavie Sciences.
^d Pluronic F68 (INCI: Poloxamer 188) is a product of Sigma-Aldrich.
^e Launched by SpacePharma
^f SPAd-ISS (SpacePharma Advanced Lab x ISS) 

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