The importance of hydration for the throat and voice

Adequate hydration is crucial for the health of the throat and voice. The mucous membranes in the throat and the vocal cords need moisture to function optimally. Well-hydrated vocal cords are more supple and can vibrate well, which has a positive effect on voice quality. A systematic review emphasises that systemic hydration is a simple and cost-effective method of improving voice quality (Alves et al., 2019).

A distinction is made between systemic (internal) and superficial (external) hydration. Systemic hydration refers to general fluid intake through drinking, which moisturises the mucous membranes throughout the body, including the vocal cords. Superficial hydration involves the direct moistening of the mucous membranes, for example by inhaling water vapour. Both forms of hydration contribute to maintaining healthy vocal function (Hartley, 2014).

• Drink regularly: It is recommended to drink around 1.5 to 2 litres of water per day, depending on individual factors such as body weight and activity level.
• Avoid factors that cause dehydration: Alcohol and caffeinated drinks can have a dehydrating effect and should be consumed in moderation.
• Humidify the air: In dry environments, using a humidifier can help keep the mucous membranes moist.
• Water-rich foods: Eating water-rich foods such as cucumbers, melons and grapes can contribute to hydration.

Glycerine (glycerol) attracts and binds moisture from the environment. These properties make it a frequently used excipient in medical products for moisturising the mucous membranes, for example in lozenges or oral gels. Glycerine can help to moisturise the mucous membranes in the mouth and throat. This can be particularly helpful in dry indoor air or during prolonged speaking.

Continuous and conscious fluid intake supports the health of the throat and voice. Simple measures such as drinking regularly and avoiding factors that cause dehydration can maintain and promote vocal function.