Is cold water bad for you, or is it simply an old wives’ tale, or could there be some truth to the claim that drinking ice-cold water could harm your body? Let’s explore this topic from an Ayurvedic perspective and see how modern science is backing up some of these ancient insights.
Section 1: The Ayurvedic Perspective
Let’s start with one basic rule of Ayurveda:
Samanya Vishesh Siddhant.
This principle focuses on the idea of inputs with similar (samanya) or different (vishesha) qualities in maintaining health. The goal is to restore balance by using inputs with opposite qualities, while inputs with similar qualities can increase or aggravate health issues. These inputs can include food, water, lifestyle, and perception.
When we consider ice-cold water from an Ayurvedic point of view, two things happen:
- Introduction of Similar Qualities: Cold (sheeta), will increases vata dosha and cause constriction, slowing down gastric contractions.
To recap- the qualities of vata are sheeta, laghu, ruksha, sukshma, chala, khara.
i.e. – cold, light, dry, subtle, moving, rough.
People with predominant vata will have a higher chance for health problems on ingestion of ice cold water. Please refer to my previous article for further details.
- Affects Digestion: by lowering the digestive strength, and here’s why: It’s similar to pouring cold water on a fire – i.e. agni, the digestive fire. When agni weakens or slows down, it can result in the buildup of ama (undigested food particles that turn into toxins). Over time, this can cause constipation, bloating, abdominal pain, and lead to degeneration of tissues, such as in the case of arthritis and other joint issues—common signs of vata imbalance.
In Western terms, cold water makes digestive enzymes less effective, which means food isn’t digested as efficiently.
Section 2: What Does Modern Science Say?
Now, let’s see what science has to say—because Ayurveda may have been onto something!
1. Reduction in Gastric Contractions
Studies [1, 2] have found that when participants drank cold water (around 2°C or 35.6°F), their gastric contractions—the movements that help digest food—decreased significantly, leading to impaired gastric function.
This is in line with the Ayurvedic concept of vata imbalance, where cold slows down peristalsis.
2. Nerve Damage and Cognitive Decline
Long-term consumption of cold water may also have neurological effects. A study [3] showed that it can aggravate the formation of senile plaques and cause neuronal injury, leading to cognitive decline. This was shown to be caused due to decrease in pepsin activity and gastric emptying rates, which decreases calorie intake and causes an imbalance in neurotransmitter function.
3. Difficulty Swallowing
Research has found that cold water can exacerbate symptoms of achalasia—a disorder where the esophagus struggles to move food into the stomach [4, 5, ].
4. Heart Rate
One study [6] found that drinking cold water can lower heart rate by stimulating the vagus nerve. This can make some people feel light-headed or dizzy, and in extreme cases, cold water can cause fainting during heat exhaustion due to over-stimulation of the vagus nerve.
5. Blood Pressure
Drinking cold water causes vasoconstriction, leading to an immediate increase in blood pressure. While this can be useful as a first aid treatment for hypotension, it may not be ideal for everyone [7].
6. Respiratory Symptoms
Cold water can also exacerbate respiratory symptoms [8]. This is a common warning passed down by grandmothers, especially during cold and flu seasons.
7. Homeostasis Disruption
The body has to work extra hard to regulate its temperature when cold water is ingested, as it aims to keep the body’s normal temperature of 37°C (98.6°F). The energy spent on this process could otherwise be used for digestion and nutrient absorption. Drinking excessive cold water essentially diverts the body’s energy from extracting nutrients from food.
Interestingly, in warm countries like India, even in the heat of summer, people—especially our forefathers—drank room temperature water or even hot tea after returning from a scorching afternoon.
Section 3: Counterargument – Is There Enough Supporting Data?
Some [9] may dismiss Ayurveda’s caution about cold water due to the small sample sizes in modern studies, but this overlooks the bigger picture. Ayurveda’s principles have been observed for thousands of years, and while modern research on cold water’s effects is still limited, it does align with many Ayurvedic concerns about cold water’s impact on digestion, circulation, and cognition. This is especially true for vata individuals who are more prone to imbalance.
In Ayurveda, disease develops from multiple factors over time. While cold water may not be the sole cause, it can contribute to imbalance. Instead of dismissing these claims outright, more research and funding should be dedicated to validating Ayurveda’s insights rather than disregarding centuries of clinical wisdom.
Conclusion: The Bottom Line—Drink Room Temperature or Warm Water!
One can enjoy cold water once in a while especially people with predominant vata and kapha doshas.
