Scientifically Proven Foods to Control Blood Sugar Levels (Extensive Guide)

control blood sugar levels

We all know that maintaining a healthy diet is vital in terms of controlling blood sugar levels and preventing type 2 diabetes. Generally, the advice given to diabetics is relevant to the general population as well: consume adequate vegetables, fruits, legumes, whole grains, low-fat dairy products, poultry and fish, and less industrial sweets and foods high in bad fat and salt.

It is Possible to Control Blood Sugar Levels Naturally

It is known that patients who use professional advice and expert dieticians and nutritional supervision have a much better chance to maintain balanced levels of sugar, and avoid the complications of the disease.

Diabetics should also keep meals at regular times throughout the day to avoid sharp rises in blood sugar levels.

So what are the best foods to control diabetes and blood glucose levels? You might be surprised to learn that you already have many of these foods in your kitchen.

How To control Blood Sugar Levels Naturally: The Best Foods to Control Type 2 Diabetes According to Science

1. Olive oil

A study published in scientific journal Diabetes Care indicated that any Mediterranean diet which contains olive oil is capable of reducing type II diabetes by over 50%. This is because the oil contains monounsaturated fats like those found in seeds and nuts. These fats are essential in reducing risks of chronic diseases such as diabetes and cancer.

Further reading: Health Benefits of Olive Oil.

2. Cinnamon

Research has displayed cinnamon’s ability to lowering the body’s resistance to insulin and decrease overall cholesterol levels within people that have type 2 diabetes.

A review of medical studies concluded that “consumption of cinnamon is associated with a statistically significant decrease in levels of fasting plasma glucose, total cholesterol, LDL-C, and triglyceride levels.”

Cinnamon can be ingested in the powdered form or taken as a supplement (consult with your doctor before taking cinnamon, or other herb, in a supplement form).

Ceylon Cinnamon (“true cinnamon”) is the best choice as this type of cinnamon is more closely associated with potential health benefits involving blood sugar regulation.

Due to the lower sugar levels while using cinnamon, some physicians recommend avoiding other supplements on the list such as fenugreek, garlic, bitter melon, and ginseng.

Further reading: How to Use Cinnamon as a Medicine.

3. Green Tea

Green tea contains the antioxidant EGCG, which helps to maintain the flexibility of blood vessels and stabilizing blood glucose levels.

Medical studies found that the polyphenols in green tea polyphenols have an antidiabetic effect. Researchers found that consuming green tea boosts glucose metabolism in humans and can help control blood glucose levels after eating.

A scientific study published in the Journal of Nephropharmacology that green tea has an antidiabetic effect.

Read more about the amazing health benefits of green tea.

4. Pulses

Legumes such as lentils, peas, beans and chickpeas are low in fat and calories and also rich in fiber and protein.

Dietary fiber slows the rate of sugar absorption into the blood and reduces the glycemic load. They are a great addition to soups, salads and a variety of other dishes.

5. Green Vegetables

According to a study fresh green vegetable leaves such as lettuce, cabbage, spinach, Swiss chard and parsley, and other green vegetables  (fresh, steamed or frozen) such as celery, cucumber, cauliflower, green beans and kohlrabi contain carbohydrates that release hormones in the gut that reduce appetite.

In addition, the researchers found that these vegetables improves insulin sensitivity and thus better regulate blood glucose levels. Eating vegetables like asparagus, garlic and Jerusalem artichoke can help in cases of diabetes and obesity, and reduce the risk of type 2 diabetes because vegetables are rich in magnesium and are known as effective antioxidants.

6. Oatmeal

Oats contain a high percentage of fiber, B vitamins (especially B1), vitamin E and antioxidants.

When made from rolled oat or steel cut oats, oatmeal is a healthy food for people with diabetes.

According to the American Diabetes Association, Oatmeal has a low glycemic index and is good for helping to stabilize blood glucose levels.

A 2018 crossover study found that oatmeal may help to reduce the amount of insulin diabetics require. In the study, people with type 2 diabetes consumed oatmeal for 2 days. Researchers noted that because of the meals containing oats, the diabetics needed less insulin.

A review of 14 controlled trials found that consuming oats has many benefits if you have diabetes. Oatmeal helps to lower blood glucose spikes after eating, improve insulin responses, and lower cholesterol.

Click here to find easy and delicious porridge recipes with oatmeal.

7. Red Apples

A medical study found that men who ate the greatest number of apples (and other foods rich in quercetin) had 20% less deaths related to diabetes or heart complications.

Other good sources of quercetin are red grapes, tomatoes, onions, green vegetables and berries.

8.  Vitamin C Rich Foods

Studies show that people with diabetes have lower levels of vitamin C in their body, so rich foods in vitamin C such as berries, citrus fruits, peppers, dark green leafy vegetables, kiwifruit and tomatoes are loaded with antioxidants and are an excellent choice.

9. Cold-Water Fish

Those who suffer from diabetes are twice more likely to suffer also from heart disease. A diet rich in omega-3 fatty acids found in cold water fish, can help to lower “bad” cholesterol and raise your “good” cholesterol.

Seafood is a great source for omega 3, such as: halibut, herring, mackerel, oysters, salmon, sardines, trout, tuna and cod.

Vegetables, especially green leafy ones, such as: kale, parsley, mint, Brussels sprouts, spinach and watercress, are rich in ALA, one form of omega-3 fatty acids (although ALA isn’t as powerful as the other omega 3 fatty acids, DHA and EPA).

Ground flaxseed is also a good source of omega 3. Read here more about the fantastic health benefits of omega 3.

10. Raw Cacao Powder

Cacao powder comes from grinding up cacao beans after removing the cocoa butter (cocoa fat). Cacao powder is claimed to be a superfood because it contains naturally occurring antioxidants with many health benefits.

Flavanols in products containing high levels of cacao can help to manage many of the symptoms of diabetes.

The journal Antioxidants reported that flavonoids in cacao extracts have an anti-diabetic effect. Cocoa flavonoids can improve insulin sensitivity and reduce blood fat levels (lipids). Researchers suggested that daily consumption of unsweetened dark cacao powder that contains high levels of cacao could help manage type 2 diabetes.

However, other studies have not shown conclusive evidence on consuming cocoa-based products with flavanols to manage type 2 diabetes.

When using raw cacao powder for helping to prevent diabetes symptoms, it’s important to choose unsweetened cacao powder. This will help to prevent spikes in blood glucose levels.

Further reading: Scientifically Proven Health Benefits of Cacao Powder and Dark Chocolate.

11. Grass Fed Beef

There are other nutrients in beef other than protein, iron and vitamin B. There is an element which is part of the beef fat which is called CLA (conjugated linoleic acid). The most abundant source of CLA is beef from grass-fed cows. Experiments have shown that CLA works to correct improper utilization of blood sugar and helps fight cancer and heart disease.

In a recent study in Norway scientists have added a few grams of CLA to the daily diet of 180 people. They reported that they lost 9% of their body weight in one year. Make sure that the beef is processed as little as possible, as it contains more CLA. Other food sources of CLA in smaller amounts include milk and eggs.

12. Apple Cider Vinegar (ACV)

According to webMD website, the effect of ACV on blood sugar levels is one of the best researched and the most promising. Several studies have found that vinegar may help lower glucose levels.

The European Journal of Clinical Nutrition published a study on a small group of people. It was found that acetic acid has a positive effect on blood glucose and prevented blood sugar spiking after meals.

Also, the American Diabetes Association reported that taking apple cider vinegar before bedtime can help control blood fasting glucose levels. It was found that apple cider vinegar has an anti-glycemic effect and can help to control the symptoms of type 2 diabetes.

Further reading: 10 Proven Benefits of Drinking Apple Cider Vinegar (Science Based).

13. Okra

Particularly interesting is the research into the potential of okra (also known as lady’s fingers, bamia, bhindi or gumbo) in the treatment of diabetes. The studies have only been done on animal models so far and it’s too early to draw any conclusions, but the preliminary findings are promising.

A medical study from 2011 showed that okra helped reduce the absorption of glucose and lowered blood sugar levels in rats. Another study on rats was conducted in 2011 and provided similar results (see more information in my article about the amazing health benefits of okra).

14. Bitter Melon

Bitter melon, also known as wild cucumber or bitter apple, grows in Asia, East Africa, South America and the Caribbean.

It is consumed as food and also has many medicinal effects. It has a strange appearance, almost like a bumpy green banana, and contains three different properties that are proven to help diabetics.

Clinical studies continue to evaluate the charantin, polypeptide-p, and vicine, each of which have shown an ability to lower blood sugar.

You can read more about bitter melon and how to consume it in my article Bitter Melon Can Treat Pancreatic Cancer and Diabetes.

15. Turmeric

This common relative of the ginger family is of popular harvest in southern India, explaining its prevalence in Indian cuisine. While it’s praised by foodies for the earthy and spicy attributes that make so many curries kick with taste, there have also been recent research that suggests turmeric’s effectiveness in treating type 2 diabetes.

One medical study focused on the use of turmeric’s active ingredient, known as curcumin, to prevent diabetes from developing as well as giving a considerable boost to liver function.

Another study published in an international nutrition journal details the way that turmeric and curcumin administration gave a surprising advantage in lowering the blood sugar and hemoglobin levels within rats.

Further reading: Health Benefits of Turmeric + Golden Milk Recipe.

16. Ginger

What turmeric was to Indian cuisine, ginger is to Asian foods. It also yields similar benefits for people with diabetes. A 2012 study found that the root may help with blood sugar control, producing glucose without relying on insulin.

Ginger root can be consumed raw, powdered, extracted into oil and liquids, and in an extracted supplement form. It also has been suggested to help with nausea, heartburn, bronchitis and menstrual symptoms.

Further reading: How to Use Ginger as a Medicine.

17. Fenugreek

Controlling the symptoms of diabetes is one of the most popular reasons for taking fenugreek extract supplements.

A 2017 review of 18 studies into the health benefits fenugreek found that many types of fenugreek supplements are useful for controlling diabetes. For example, one study showed that 500 mg of fenugreek powder helped to control blood sugar levels. Or, adding 15 g of fenugreek seeds soaked in water also prevented glucose levels from spiking after eating. Other studies into fenugreek and diabetes found that fenugreek extracts helped to reduce insulin resistance.

Another study found that “fenugreek supplementation modestly improves glucose tolerance without affecting insulin tolerance, body weight, or body composition”.

There is also scientific evidence to suggest that fenugreek can help to prevent diabetes. One 3-year randomized, controlled trial found that taking 5 g fenugreek powder twice a day before meals helped to prevent the progression of type 2 diabetes. All of the participants were showing the classic symptoms that they were at risk of diabetes. The research showed that fenugreek improved fasting glucose sugar, glucose levels after eating, and LDL cholesterol.

Further reading: Scientifically Proven Benefits of Fenugreek and Its Side Effects.

18. Garlic (Allium)

Regularly taking garlic extract supplements can help to lower blood glucose levels. Taking garlic can also help you manage the symptoms of type 2 diabetes.

A comparison of studies into the antidiabetic effect of garlic found that garlic supplementation helps to reduce blood glucose levels. Taking garlic supplements up to 1.5 g daily helped to lower fasting blood glucose in 1-2 weeks.

Some trials found that tablets of dry garlic powder were effective in controlling diabetes symptoms. Other trials found that garlic capsules enhanced with allicin were also effective in managing type 2 diabetes.

Studies using rats found that aged garlic extracts have a strong antidiabetic effect. Scientists noted that aged garlic extract (AGE) were just as potent as fresh garlic in helping to lower blood sugar glucose.

Further reading: Medicinal Health Benefits of Garlic (Raw, Supplement) – Science Based.

19. Aloe Vera

In a 2001 study in Phytotherapy Research, aloe vera extract was shown to help lower the blood sugar levels of rats, laying skepticism of its medicinal use to rest. The study concluded that the pulp of aloe vera leaves is a potentially useful way to treat diabetes.

Further reading: Why You Should Start Drinking Aloe Vera Juice.

20. Cumin

A study by researchers at Mysore University in India explored the potential anti-diabetic properties of cumin seeds. In this study, published in 1998 in the journal “Nutrition Research,” the research team fed diabetes-induced rats a diet of 1.25% ground cumin for eight weeks with positive results.

The rats experienced a reduction in hypoglycemia, or low blood sugar — a condition common in diabetics — and glucosuria, in which the urine contains too much glucose.

A review of scientific studies confirmed that a number of spices, including cumin, may have anti-diabetic properties. Talk to your doctor about using cumin for blood sugar control.

Taking cumin along with diabetes medications might cause your blood glucose to drop too low. If you take diabetes medication, make sure to consult with your doctor first.

Further reading: The Miraculous Health Benefits and Uses of Cumin.

21. Lemon

If you have diabetes, taking one or 2 lemons a day along with the peel could benefit you and reduce your symptoms of diabetes.

Research carried out in 2013 found that polyphenolic compounds in lemon peel can help to reduce insulin resistance. The research found that citrus flavonoids help to reduce inflammatory responses and increase insulin sensitivity.

Due to its vitamin C content, lemon juice may also control blood glucose levels.

Further reading: Scientifically Proven Health Benefits of Lemons.

22. Ginseng

The holistic healing of ginseng has stood the test of time, touted by Ayurvedic experts for hundreds of years. The boost in mental performance, immune system defense, endurance, and cancer treatment are but a few of the benefits that pair with the root’s ability to help treat diabetes.

Research from a Croatian university showed that ginseng was able to reduce the amount of glucose in the bloodstream, giving a vital boost for diabetics. It can be ingested in several different ways. Some natural health enthusiasts prefer mixing the raw root into their teas with other herbs and supplements. Others use infusions, extracts, pills, and powdered forms of the root.

Foods for Treating Diabetes – The Bottom Line

In summary, these best foods to control diabetes should be added to your daily menu. You can start the day with oatmeal porridge flavored with cinnamon, eat for lunch grass fed beef with poached green vegetables, drink afternoon green tea alongside a red apple, and in the evening eat lentil soup.

At bedtime drink another cup of green tea in order to lower blood sugar levels and calm the digestive system before going to sleep.

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