From the Guidelines
Hydration plays a crucial role in maintaining skin health, and bathing with water alone or with a nonsoap cleanser, followed by the application of a bland emollient, can help improve skin hydration and skin barrier function. This is supported by a study published in Pediatrics in 2021 1, which recommends bathing with water alone or with a nonsoap cleanser at least 2 to 3 times per week, followed by the application of a bland emollient to improve skin hydration and skin barrier function.
Some key points to consider when it comes to hydration and skin health include:
- Bathing boosts skin hydration while eliminating residual bacteria, crusting, and irritants, as noted in a study published in the Journal of Allergy and Clinical Immunology in 2017 1
- Application of moisturizers after bathing is critical to maintain adequate cutaneous hydration, as discussed in the same study 1
- The use of nonsoap cleansers and bland emollients can help reduce transepidermal water loss and improve skin hydration, as recommended in a study published in BMJ in 1995 1
- Avoiding damaging, drying, and irritating soaps with alkaline pH is also important, as recommended in the study published in the Journal of Allergy and Clinical Immunology in 2017 1
In terms of practical tips, applying moisturizer to damp skin, using a humidifier in dry environments, and incorporating hydrating ingredients like ceramides and squalane into skincare routines can help maintain skin hydration. Additionally, drinking enough water is essential to help flush toxins and maintain overall skin health. However, it's worth noting that the exact amount of water to drink daily is not specified in the provided evidence, and individual needs may vary.
From the Research
Role of Hydration in Skin Health
- Hydration plays a crucial role in maintaining skin health, with water homeostasis being vital for the normal physiological functioning of skin 2
- The stratum corneum, the uppermost layer of the skin, has a sophisticated regulatory process to ensure optimal hydration gradient, which is essential for skin health 2, 3
- Dehydration can lead to changes in skin physiology, including decreased skin hydration, increased transepidermal water loss, and altered biomechanical descriptors 4
Effects of Hydration on Skin Physiology
- Drinking sufficient water can positively impact skin physiology, particularly in individuals with lower daily water consumption 4
- Topical application of moisturizers can increase skin hydration, improve skin biomechanics, and reduce dehydration stress 3, 5
- Hydration can also affect the optical properties of the skin, with moisturized skin appearing healthier and more translucent due to decreased light scattering and increased light penetration 5
Importance of Hydration for Skin Health
- Skin hydration is essential for maintaining the skin's barrier function and preventing water loss from the body 2
- Adequate hydration can help to improve skin elasticity, suppleness, and softness, making it less prone to wrinkles and other signs of aging 6, 2
- While there is no scientific proof that drinking a specific amount of water (e.g., eight glasses a day) is necessary for skin health, staying hydrated is still important for overall skin health 6