Can cold dehydrate? Myth or reality?

How does the cold dehydrate the body?

1.1. Breathing that dries you out
When you breathe in cold weather, your body warms and humidifies the dry air you inhale. This process leads to water loss through breathing, often greater than in summer.

1.2. A reduced sense of thirst
Cold reduces the sensation of thirst. That's because the body prioritises temperature regulation by sending more blood to the vital organs, masking the need to drink. The result: you drink less water while your body keeps losing it.

1.3. The effect of cold diuresis
Cold causes the blood vessels to contract in order to preserve internal heat. This increases urine production, leading to greater fluid loss. This phenomenon, known as "cold diuresis," contributes directly to dehydration.

1.4. Invisible sweating
Even in winter, you sweat, especially if you wear several layers of clothing or do physical activity. Under your warm clothes, this sweating often goes unnoticed, but it still contributes to water loss.

What are the signs of dehydration in winter?

Winter dehydration can show up as:

• A feeling of tiredness or weakness.
• Dry, chapped lips.
• Dry, irritated skin.
• Dark or less frequent urine.
• Headaches or dizziness.
  
  
  
  

  How to prevent dehydration in cold weather?

  3.1. Drink regularly

  • Don't rely on your sense of thirst: drink water or hot drinks such as herbal infusions or tea.
  • Hydrating drinks like AQUAPOP are ideal for rehydrating effectively and pleasantly.

  3.2. Eat water-rich foods

  • Add hydrating fruits and vegetables such as citrus fruits, cucumber or courgettes to your diet.
  • Soups and broths are perfect for combining hydration and comfort in winter.

  3.3. Protect your skin

  • Use a moisturiser to prevent water loss through skin exposed to the cold.
  • Wear suitable clothing to limit excessive sweating.

  3.4. Adapt your hydration to your activity

  • If you're doing sport or walking for long periods, remember to drink more to make up for the fluids lost through exertion.
    
    
    
    
  
  
  

Although the cold doesn't seem to "make you sweat," it really can dehydrate you. Faster breathing, a reduced sense of thirst and cold diuresis are all mechanisms that promote water loss in winter. Adopting good hydration habits is therefore essential to preserve your energy and your health, even when temperatures drop.

Need an ally to stay hydrated this winter? Discover our range of hydrating products like AQUAPOP, perfect for taking care of yourself all year round!