Modestly — yes. But the effect is smaller than the wellness industry claims, and there are far more consequential drivers of skin hydration than total daily water intake.
What the research shows. A well-designed 2015 study by Palma and colleagues found that increasing water intake in previously low-intake individuals produced small but measurable improvements in skin hydration parameters (Palma et al., 2015). The effect was more pronounced in people whose baseline intake was low.
What the research does not show. Drinking more water does not "flush toxins" from skin, prevent wrinkles, or produce visible glow independent of hydration status. Once you're adequately hydrated, additional water does not linearly translate to better skin.
What actually determines skin hydration. Skin hydration is primarily a function of the barrier — the stratum corneum's ability to hold water in — not of how much water you drink. The biggest levers:
- Omega-3 status — barrier function depends on membrane lipids. Low omega-3 index correlates with elevated transepidermal water loss (Pilkington, 2011).
- Estradiol — supports the moisture-retaining function of the epidermis. Declines through perimenopause and menopause reliably produce dryness.
- Vitamin D — supports barrier function and skin immune balance.
- Skincare that respects the barrier — over-cleansing, over-exfoliating, and harsh actives strip lipids and worsen dryness regardless of water intake.
If your skin is chronically dry, addressing omega-3, estradiol, and vitamin D status is far more impactful than adding another glass of water. Blood work quantifies where you sit on all three — three of the nine on the JenSkin panel.