
Water is an essential drink for people with diabetes due to its lack of carbohydrates and calories. Studies have shown that drinking water can help control blood glucose levels, which is beneficial for people with diabetes who have high blood sugar. However, the water diet may refer to a more extreme version of this, where water is the only or main thing consumed. This could be dangerous for diabetics, as they may be more prone to dehydration, and a varied diet is important for managing blood sugar.
| Characteristics | Values |
|---|---|
| Is water safe for diabetics? | Yes, water is safe for diabetics and can help control blood glucose levels. |
| What about mineral water? | Mineral water, especially bicarbonate and magnesium-rich mineral water, may have a positive influence on glycemic parameters. |
| What about sparkling water? | Sparkling water is safe for diabetics, but be cautious of added sweeteners. |
| What about diet soda? | Diet soda may be a better option than sugared soda, but it should be consumed in moderation as it may still negatively impact health. |
| What about alcohol? | Alcohol can cause a drop in blood sugar and should be consumed in moderation. |
| What about caffeine? | Caffeinated drinks can cause dehydration, so consumption should be limited. |
| What about fruit juices? | Fruit juices contain sugar and carbohydrates, so they should be consumed in moderation and counted towards daily carb intake. |
| What about energy drinks? | Energy drinks are typically high in caffeine and carbohydrates and can cause a spike in blood sugar, so they should be avoided. |
| What about green smoothies? | Green smoothies can be a good way to add nutrients and fiber to the diet, but the fruit content should be counted towards daily carb intake. |
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What You'll Learn

Water is the perfect drink for diabetics
Water is the perfect drink for people with diabetes. It contains no carbohydrates or calories, so it won't raise blood glucose levels. In fact, studies have shown that drinking water can help control blood glucose levels and may even prevent or delay the onset of hyperglycemia and subsequent diabetes.
For people with diabetes, staying hydrated is especially important. High blood glucose levels can increase the risk of dehydration, and people with diabetes insipidus are also at higher risk of dehydration due to the body producing large amounts of urine. Water helps to rehydrate the body and flush out excess glucose through urine. It also carries a host of other health benefits, including maintaining normal body temperature and blood pressure, flushing out toxins, regulating gut health, and cushioning joints.
The European Food Safety Authority recommends that women drink 1.6 litres of water per day (around eight 200ml glasses) and men drink 2 litres (around ten 200ml glasses). However, people with diabetes should be mindful of their beverage choices and try to reduce their sugar intake. While diet sodas and sugar-free beverages can be a better option than sugary drinks, they should still be consumed in moderation as they may be linked to an increased risk of metabolic syndrome and diabetic eye complications.
Instead of reaching for a diet soda, try adding a slice of fruit, such as orange, lemon, or lime, to your water. You can also prepare frozen fruit slices to add to your water. Sparkling water is also a good option, as long as it's carbohydrate- and calorie-free. The American Diabetes Association also recommends unsweetened iced or hot tea.
In addition to water, people with diabetes should be aware of their overall fluid intake. About 20% of the fluid we need comes from foods, so it's important to eat plenty of water-rich fruits and vegetables. Staying well-hydrated has been linked to a reduced risk of developing chronic diseases and improved health outcomes.
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Mineral water may positively influence blood glucose
Water is an excellent drink for people with diabetes because it contains no carbohydrates or calories. Studies have shown that drinking water can help control blood glucose levels. When blood glucose levels are high, the body attempts to excrete excess sugar through urine, and drinking water helps to rehydrate the body.
Mineral water may also have positive effects on blood glucose levels. A 2016 review describes the relationship between elevated aldosterone levels and metabolic syndrome and type 2 diabetes. The proteins Sirtuin 1 (SIRT1) and peroxisome proliferator-activated receptor-gamma coactivator (PGC)1-α ) counteract metabolic syndrome and aberrant glucose metabolism. SIRT1 positively influences multiple steps in glucose metabolism in the liver, the pancreas, muscles, and adipose tissue.
In addition, studies have shown that mineral water rich in magnesium has a positive influence on long-term blood glucose concentrations. The data indicates a positive influence of magnesium on glucose metabolism, suggesting that magnesium absorbed from mineral water positively influences glucose metabolism.
Furthermore, a recent RCT in diabetic patients with chronic kidney disease showed that supplementation with bicarbonate significantly improved multiple parameters of glucose metabolism. For example, the serum glucose concentration decreased from 127 mg/dL to 110 mg/dL, and the proportion of glycated haemoglobin declined from 7.7% to 6.7%.
While the evidence for the positive effects of mineral water on blood glucose levels is promising, it is important to note that the results are heterogeneous, and more research is needed to reach a definitive conclusion.
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Soda and sweetened drinks should be avoided
Water is the perfect drink for people with diabetes because it contains no carbohydrates or calories. Studies have shown that drinking water can help control blood glucose levels and prevent dehydration. The European Food Safety Authority advises that men should drink around ten 200ml glasses of fluid per day, and women should drink around eight 200ml glasses per day. This fluid intake can be made up of any drink, but water is the most highly recommended.
While water is the best drink for diabetics, other drinks can be consumed in moderation. For example, people with diabetes can drink Coke Zero and other sugar-free beverages. However, it is important to note that these drinks may contain artificial sweeteners, which have been linked to an increased risk of insulin resistance.
Sweetened drinks, on the other hand, should be avoided. Research has shown that drinking too much soda is strongly linked to diabetes. Soda has an extremely high glycemic index, which can contribute to increased insulin resistance over time. This is because the high load of quick-digesting carbohydrates from the sugar in soda results in a higher demand for insulin, which can wear out the pancreas and lead to glucose intolerance.
Additionally, sweetened drinks contribute to weight gain, which is a risk factor for type 2 diabetes. A 2010 study found that the risk of developing diabetes was 26% higher for people who consumed one or more sugary drinks every day. Similarly, a 2013 case-cohort study found that people who consumed sugar-sweetened drinks every day had a higher risk of developing type 2 diabetes than those who drank less than one a month, even when energy intake and body mass index were accounted for.
Therefore, it is best for people with diabetes to avoid regularly sweetened sodas and sweetened energy drinks. Instead, they should opt for water or other sugar-free beverages, consumed in moderation.
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Alcohol may worsen diabetes complications
Water is the perfect drink for people with diabetes. It contains no carbohydrates or calories, and studies have shown that drinking water can help control blood glucose levels. The body of a person with diabetes requires more fluids when blood glucose levels are high, and water does not raise these levels, making it beneficial in flushing out excess glucose from the blood.
If you have diabetes complications, such as nerve, eye, or kidney damage, your healthcare provider may advise against drinking alcohol, as it may worsen these complications. Alcohol can negatively impact people with diabetes in several ways:
- Blood Sugar Levels: Alcohol can cause blood sugar levels to drop, especially if you haven't eaten enough. This is because the liver, which releases glucose into the bloodstream to maintain normal blood sugar levels, prioritises breaking down alcohol instead of releasing glucose. This can lead to hypoglycaemia, which is characterised by symptoms such as slurred speech, drowsiness, confusion, and difficulty walking. The risk of hypoglycaemia increases with each additional drink and can occur hours after your last drink, especially if you've been exercising.
- Weight Gain: Alcoholic drinks often contain a significant number of calories, and alcohol can stimulate your appetite, leading to potential weight gain.
- Interaction with Medication: Alcohol may reduce the effectiveness of diabetes medications, especially insulin and sulfonylureas. This interaction can further increase the risk of hypoglycaemia.
- Worsening of Symptoms: Alcohol can worsen certain symptoms of diabetes, such as burning and tingling sensations in the hands and feet due to diabetic neuropathy.
Therefore, it is generally recommended that people with diabetes drink in moderation, if at all. It is important to consult with a healthcare provider to determine if drinking alcohol is safe and to understand how it may affect you individually. Additionally, drinking alcohol with food, especially carbohydrate-rich snacks, can help maintain normal blood sugar levels and reduce the risk of hypoglycaemia.
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Water helps control blood glucose levels
Water is an essential drink for people with diabetes because it contains no carbohydrates or calories. Studies have shown that drinking water can help control blood glucose levels. Here are some ways water helps control blood glucose levels:
Water Dilutes Blood Sugar
Drinking enough water can help to dilute the blood and reverse a rise in blood sugar. When dehydrated, everything in the blood becomes more concentrated, including glucose. Water can help to reduce this concentration of sugars in the blood.
Water Increases Urination
Drinking water increases the amount of urine produced, which helps to excrete more glucose from the body. When blood sugar is high, the kidneys attempt to eliminate excess sugar through urine. This process requires water, and as glucose enters the urine, it pulls water with it.
Water Reduces Food Consumption
Water may help you feel more full, so you eat less. This can help to keep carbohydrate intake lower, so blood sugar is less likely to spike.
Water Prevents Dehydration
People with diabetes have a heightened risk of dehydration, especially when blood glucose levels are high. Drinking water helps to rehydrate the blood when the body tries to remove excess glucose through urine.
While increasing water intake is a helpful measure, it should be used alongside other strategies such as insulin administration, dietary changes, and exercise to effectively control blood glucose levels.
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Frequently asked questions
Water is safe for diabetics to drink and can help control blood glucose levels. Water contains no carbohydrates or calories, so it won't raise blood glucose levels. It is also beneficial in rehydrating the blood when the body tries to remove excess glucose through urine.
Some people don't like the taste of plain water. If this is the case for you, try adding a slice of fruit, such as orange, lemon, lime, pineapple, watermelon, or cucumber. You can also add herbs like mint or basil. Alternatively, you can choose sparkling water or make sugar-free, fruit-infused water.
The European Food Safety Authority advises that women drink 1.6 litres of water per day (around eight 200ml glasses) and men drink 2 litres (around ten 200ml glasses). However, this may vary depending on your age, activity level, climate, body weight, and medical conditions. If you have any concerns, consult your doctor or dietitian.
People with diabetes should avoid sugary drinks, fruit juices, and energy drinks, as these can cause a spike in blood sugar levels. Alcohol and caffeinated drinks should also be limited as they can cause dehydration. While diet soda is generally considered safe for diabetics, it should be consumed in moderation as it may be linked to an increased risk of metabolic syndrome and eye complications.
Yes, staying adequately hydrated has various health benefits, including maintaining normal body temperature and blood pressure, flushing out toxins, regulating gut health, and cushioning joints. It also helps the body maintain a balance of sodium, vitamins, minerals, and hormones. Additionally, a 2011 study suggested that increasing water intake could prevent or delay the onset of hyperglycemia and subsequent diabetes.










































