Skin Sim app simulates seasonal drying stresses on skin at a reference house

Use the Skin Sim app to guide your seasonal skin care

The Skin Sim app simulates seasonal changes in drying stresses on skin at a reference house in your community. It uses an indoor air model along with historic climatic data from NASA to reconstruct these stresses.

The app presents two diagnostics for evaluating these stresses. The first is the Dermal Hydration Deficit. The hydration deficit represents the difference between the skin’s water content at an optimum value of 60% relative humidity and the content at an indoor humidity below 60%. The Dry Skin Index is based on a thermodynamic property of water vapor. I is calculate from indoor temperature and humidity.

How can Skin Sim help you improve your skin care?

A motivating force behind Dermidia is the recognition that 1) as we age our skin becomes more susceptible to indoor drying stresses, and 2) these stresses change seasonally, but we can’t sense them directly. Therefore, we need tools to guide our skin-care practices over the course of a year.

One such tool we developed is the app Skin Sim, which is available from Google Play and iOS App Store.

The adjacent screen shot depicts the simulation results from the app for a location that has a large number of days in which the Dry Skin Index is above 5. Perhaps the biggest surprise is how the drying stresses increased rapidly in the early fall after the humid summer months. This is apt to be a time when people begin experiencing dry skin without necessarily knowing the cause.

Conversely, stresses begin to let up in late Spring, which means that your skin-care should change as well.

You can become more knowledgeable about the seasonal drying stresses impacting your skin care by using the Skin Sim app.

Skin Sim by Dermidia simulates the Dry Skin Index

Discover patterns of dermal drying stresses that matter to you. Prepare and respond accordingly!

Dave Layton, Owner, Dermalapps LLC

Action items

It is quite easy to use the Skin Sim app–download from one of the app stores and type in your location.

  • Pay particular attention to the number of days above DSI levels of 5 and 6, as these elevated levels increase the risk of dry skin formation.
  • Identify times of year in which the Dry Skin Index is rapidly increasing or decreasing.
  • Consider how to compensate for these changing stresses by applying moisturizing lotions/creams to areas of skin prone to dryness.
  • Don’t forget about room humidifiers as another way to reduce drying stresses when indoor humidities are low.

For more personal, timely and relevant information on the drying stresses impacting your skin, consider getting the DSI Sense. This sensor constantly tracks the dermal stresses in your residence so that you can adjust your skin-care practices accordingly. Avoid the seasonal surprises that other face. Compensate for the increasing susceptibilities of aging skin to indoor drying conditions by the proactive use of moisturizers and room humidifiers.

What levels of the Dry Skin Index initiate dry-skin formation?

A fundamental issue impacting our personal skin care is the inability to sense the magnitude of drying stresses on skin. This really inhibits the timely and effective use of skin moisturizers and/or humidifier. The Dry Skin Index (DSI) measures these stresses, which are conveniently monitored using Dermidia’s DSI Sense + smartphone app. But what levels of the Dry Skin Index might trigger dry-skin formation?

The Dry Skin Index is broken down into five stress categories ranging from very low to very high. Previously we identified the optimum relative humidity associated hydrated skin, but not the DSI levels at which people should begin to hydrate skin. Fortunately, data derived from a study by Jin et al. (2021) allows us to identity key threshold levels.

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A humidifier supports better skin care

Use a humidifier to fight winter dry skin!

Millions of people use humidifiers to combat seasonal dry air and its impact on skin (e.g., “winter dry skin”). However, it may not always be clear how well they work and whether they really can support better skin care. These are important concerns, so I decided to conduct a simple test using a small room humidifier in my home office.

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Consider moisturizers with ceramides for aging skin

Healthy, hydrated skin does not show signs of dryness such as dry spots or skin flakes. Skin hydration depends on the barrier function of the skin’s outer layer (stratum corneum). Lipids (fats) in this outer layer help control the loss of water from the skin. Ceramides are a key component of skin lipids. They are also used as an active ingredient in various moisturizing lotions and creams.

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Home office

How working at home supports your skin care

Efforts to control the Covid-19 epidemic included lockdowns that forced millions of people to work at home in addition to those previously doing so. If you are now working from home, then you have probably already considered the many pros and cons of this arrangement. One of the “collateral” benefits you might not have considered is that working at home can actually support better skin care! Although this assertion may not seem obvious, there are at least 4 reasons why you should enjoy healthier skin at home, as compared to working elsewhere:

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Humidifier

When should you turn on a humidifier to hydrate your skin?

Each year people in the USA conduct Internet searches on Google for the term “humidifier” [see chart below]. These searches are seasonal in nature and coincide with the drying trends in the weather that impact indoor air. Internet searches for “humidifier” are also seasonally correlated with searches for “dry skin”, which makes sense because people use humidifiers to deal with dry skin and other conditions related to dry indoor air. Depending on your situation, you can decide to turn on your humidifier when:

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Treat dry skin to reduce proinflammatory cytokines contributing to age-related diseases

Keeping your skin hydrated as you age is necessary to maintain your skin’s barrier function and inhibit the formation of dry skin. Research now indicates that a collateral benefit of hydrating skin care is a reduction in proinflammatory cytokines circulating in blood. These agents in blood plasma have been associated with inflammaging, which is low level, subclinical inflammation prevalent in aging populations.

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