Diabetes Explained

Evidence Based

Causes of Diabetes

In this section, we would be only focusing on the dietary reasons responsible for type-2 diabetes.

Fatty Acids

Saturated fatty acids and trans-fatty acids found in meat and dairy products have been linked to a high risk of type-2 diabetes [2,4,7].

A report published to understand the link between meat consumption and diabetes risk concluded that the fatty acids found in animal products can have an adverse metabolic effect on insulin sensitivity [4,7].

Clarified butter or Ghee used for cooking in India and other South Asian countries, has an extremely high trans fatty acid content to the level of 50% [2].

The report inferred high consumption of animal products as well as refined grains as the major reasons for the diabetic epidemic in Asia [2,4].

Haem Iron

Haem iron found in meat and meat products is absorbed much easier by the body than non-haem iron.

However, elevated iron levels are thought to impair insulin sensitivity and increase blood glucose concentration thus leading to higher type 2 diabetes [7].

Researchers have found that even after mediating haem iron concentrations in meat, they found other compounds like advanced glycation end products and trimethylamine N-oxide that have strong mechanistic links to insulin resistance [8].

Also, iron can promote oxidative stress by increasing the formation of harmful chemicals capable of damaging pancreatic beta cells that produce insulin [9].

Nitrate

Salt/ Sodium or nitrates used as preservatives in red and processed meat is considered to increase the risk of Type-2 diabetes [10].

These nitrates are converted to a substance called nitrosamines either due to chemical reactions in the meat or once consumed [11].

Nitrosamines could also be produced from heterocyclic amines or polycyclic aromatic hydrocarbons while cooking meat at very high temperatures [7].

Different studies have proven that nitrosamines are toxic to pancreatic Beta cells and capable of decreasing insulin secretion thereby increasing the risk of diabetes [10,11].

High Glycaemic Index Foods

It would be an incomplete analysis without mentioning the role of foods with a high glycaemic index (GI) in increasing diabetes risk.

Foods high in carbohydrates or starch are known to have a high glycaemic index and capable of causing a high increase in blood glucose level.

As a result, the insulin demand increases and may lead to pancreatic β-cell exhaustion eventually [2].

Foods like sugar-sweetened beverages, white rice, potatoes, white bread, sugary foods etc. fall in this category.

Apart from the diabetes risk factors involved from consuming animal protein, scientists have also attributed foods with a high GI index as a major cause [2,4].

Obesity

Meat and dairy products are high in total, saturated and trans-fat content with a risk of weight gain and obesity [2,4,7].

Multiple studies have highlighted the high risk and probability of developing diabetes-2 in people who are overweight and obese [2,3,13].

More detailed analysis of the link between diabetes and obesity covered in the obesity article.

Evidence Based

Reducing Risks of Diabetes

Eating a plant-based diet that is low in saturated fats and glycaemic index is beneficial in reducing the risks of diabetes.

Consume Healthy Fats

Foods that are high in saturated fats and cholesterol found usually in animal products and fast foods can increase the risk of diabetes.

On the other hand, polyunsaturated fats (PUFA) and mono-unsaturated fats (MUFA) may be beneficial in terms of insulin sensitivity and could decrease the risk of diabetes.

Nuts consumption has indicated a favourable effect on type-2 diabetes patients. Walnuts especially have certain bioactive compounds such as plant sterols, dietary fibre, polyphenols and antioxidants[15].

Similarly, Olive oil is another healthy source of vegetable fat (MUFA) that has beneficial factors known to reduce oxidative stress, improve insulin sensitivity and glycemic control, all of which are considered as strong risk factors for Type-2 diabetes [15,16].

Eat More Greens & Non-Starchy Veggies

Non-starchy veggies such as kale, carrots are low in carbohydrates and sugar and a great source of essential nutrients.

Most of the green vegetables fall in this category. The magnesium content found in leafy vegetables has been found to be protective against diabetes risk [6].

Consume More High Fibre Food

High cereal fibre intake reduces type-2 diabetes risk. Consuming fruits and legumes high in fibre can reduce type-2 diabetes risk as well as oxidative stress[12].

Components in high fibre food that may be protective against chronic disease risk are a resistant starch, magnesium, phenolic compounds etc [12].

Decrease Propionate Consumption

Consumption of propionate, a food ingredient used widely in baked goods, animal feeds and artificial flavours have been linked to increased risk of obesity and diabetes [16].

The study indicates that propionate can trigger a cascade of metabolic events that can eventually lead to insulin resistance and hyperinsulinemia — a condition marked by excessive levels of insulin[16].

Decrease Sugar Intake

Researchers examined data on sugar availability and diabetes rates from 175 countries over the past decade and concluded that increased sugar intake was linked to higher diabetes risk, independent of obesity rates[17].

The study indicated that for every 150 additional calories of sugar intake, the diabetes prevalence rate increased by 1% [17].

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