Evidence supporting the use of: Lemon
For the health condition: Dehydration

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Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Lemon has traditionally been used as an ingredient in drinks intended to support hydration, such as lemon water and oral rehydration solutions (ORS) in some cultures. The primary reason for its inclusion is its refreshing taste and the presence of small amounts of electrolytes like potassium and trace minerals, which can make water more palatable and encourage increased fluid intake. Historically, adding lemon to water has been a popular folk remedy for thirst and mild dehydration, especially in hot climates.

However, scientific evidence directly supporting lemon as a treatment for dehydration is limited. The mainstay for treating dehydration is the replacement of lost fluids and electrolytes—primarily sodium, potassium, and glucose. Lemon itself contains only small amounts of these electrolytes and does not provide significant sodium, which is crucial for effective rehydration. While lemon juice may add flavor and a modest amount of potassium and vitamin C, it does not substitute for medically formulated oral rehydration solutions.

In summary, lemon is traditionally used to flavor water and make it more appealing, which can indirectly support hydration by encouraging fluid consumption. However, its direct physiological impact on rehydration is minor compared to evidence-based rehydration therapies. Thus, the tradition is strong, but the scientific evidence for lemon alone as a treatment for dehydration is weak.

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