Does coffee dry out your skin?
Drinking coffee does not demonstrably dry out the skin; the research points rather in the opposite direction. If you experience dry skin, the cause is likely to be found elsewhere.
Drinking coffee does not dry out the skin, according to the available research. In a double-blind, placebo-controlled study in women with mildly dry skin, a daily drink containing coffee polyphenols (270 mg per day) for 8 weeks improved both the hydration of the outer skin layer and barrier function. Dryness scores decreased measurably and transepidermal water loss was reduced.
In other respects too, coffee appears to moisturise the skin rather than dry it out. Kahweol, a compound naturally present in coffee, stimulated genes involved in keeping the skin moist and strengthening the barrier in cell culture studies. That is promising, but has not yet been tested in humans. An extract of coffee silverskin (a by-product of coffee processing) improved skin hydration in female volunteers and helped the skin recover after irritation. That study was, however, conducted by the company behind the product, which is relevant when interpreting the findings.
The popular use of coffee scrubs deserves attention. Water-based scrub formulations made from coffee grounds temporarily disrupted the skin barrier, but the skin recovered fully within 6 hours after applying a regular hand cream. Ointment-based scrubs produced no measurable disruption at all. The dryness some people experience after a scrub therefore appears to be temporary and dependent on formulation, not a fundamental effect of coffee itself.
The concern that drinking coffee dries out the skin through the diuretic action of caffeine is not supported by this research. The available caffeine research focused on cellulite gels, not on skin hydration, and provides no basis for that idea.
One randomised controlled trial (PMID 28675091) forms the strongest basis for the conclusion on oral intake. The remaining sources are not further indexed and include cell culture studies, small volunteer studies and formulation research. PMID 37239862 involves a possible conflict of interest (industry-funded research).
Does sleep deprivation age your skin faster?
Sleep deprivation demonstrably worsens your hydration, elasticity, and wrinkles, after as little as one poor night. Aim for consistently adequate sleep, and combine it with sun protection for the best result.
Do cold showers really make your skin tighter?
Cold showers do not make your skin tighter; frequent showering can actually damage the skin barrier and cause dry skin, regardless of the water temperature.
Does drinking lots of water really help against dry skin and wrinkles?
Drinking extra water probably helps a little with dry skin, especially if you were chronically under-hydrated, but its effect on wrinkles has not yet been proven. Make sure you drink enough, but do not expect a dramatic result for your skin.
What actually works against skin aging?
Using sunscreen daily is the best-supported way to slow skin ageing, supplemented by not smoking, moderate alcohol consumption and sufficient sleep. Cosmetic options such as thread lifts and honey in creams have a weaker or not yet sufficiently proven basis and call for a critical weighing of the risks.
Does chronically poor air quality age your skin?
Chronic exposure to air pollution measurably accelerates skin ageing, and the evidence for this is reasonably consistent. If you live or work in a structurally polluted environment, paying extra attention to your skin barrier (a good moisturiser, sun protection) is a worthwhile step.
Does urban pollution accelerate the ageing of your skin?
Urban pollution probably accelerates skin ageing, primarily through increased pigmentation spots and a weakened skin barrier. The combination with sun exposure is the most harmful, so good sun protection is the most concrete step you can take right now.