You might associate coconuts with keto due to their high fat and low carb content. However, when it comes to coconut sugar, things aren't so clear. In the past few years, coconut sugar has gained popularity as people began seeking healthier alternatives to normal sugar. But is it really a good choice for those following a ketogenic diet? This article examines coconut sugar in detail, comparing it to other sweeteners and providing guidance for those on a keto diet.
What is Coconut Sugar?
Coconut sugar is a natural sweetener that comes from the sap of coconut palm trees. This sap then gets heated until all the water evaporates, leaving behind a sweet, granulated sugar that looks and tastes different from regular white sugar. Most commonly, people use coconut sugar just like they would use regular sugar.
Coconut Sugar and Keto: A Clash
No, coconut sugar isn’t keto. A single two-teaspoon serving of coconut sugar contains approximately 8 grams of carbs. One teaspoon of coconut sugar contains about 4 grams of net carbs (*). While coconut sugar offers a unique flavor and slightly better nutritional profile compared to table sugar, it’s not keto-friendly due to its high carbohydrate content.
Glycemic Index: A Silver Lining?
While coconut sugar isn’t keto-friendly at all, it does have a lower glycemic index (as low as 35) compared to white sugar (58). Glycemic index measures how quickly a food raises blood sugar levels after eating. However, this slight advantage doesn't outweigh the high carb content for those strictly adhering to a ketogenic diet.
Nutritional Value: Minimal Impact
While there are some micronutrients present in coconut sugar, such as iron, potassium, and calcium, their quantities are very small. Coconut sugar undergoes less processing than table sugar. However, the minimal nutritional benefits do not justify its use on a ketogenic diet.
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Keto-Friendly Alternatives to Coconut Sugar
If you’re looking for a keto-friendly substitute for coconut sugar, there are a few options you can consider. Sweeteners like stevia, sucralose, erythritol, xylitol, monk fruit, and yacon syrup can easily fit into a low carb or ketogenic diet. However, you may need to limit your intake of other sweeteners high in carbs or sugar on a low carb diet.
Here are some of the best sweeteners for a low carb keto diet:
Stevia
Stevia is a natural sweetener derived from the Stevia rebaudiana plant. It’s considered a nonnutritive sweetener, which means that it contains little to no calories or carbs (2). The sweetener contains zero calories and zero carbohydrates, making it perfect for low-carb diets. Better yet, stevia has no impact on blood sugar levels (). Additionally, stevia is a source of antioxidants, which help protect your body from free radicals and oxidative stress (). Unlike regular sugar, animal and human studies have shown that stevia may help lower blood sugar levels (3).
Stevia is available in both liquid and powdered form and can be used to sweeten everything from drinks to desserts. However, because it’s much sweeter than regular sugar, recipes require less stevia to achieve the same flavor. For each cup, or 200 grams (g), of sugar, substitute only 1 teaspoon (tsp), or 4 g, of powdered stevia.
Summary: Stevia is a natural sweetener derived from the Stevia rebaudiana plant that contains little to no calories or carbs.
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Sucralose
Sucralose is an artificial sweetener that is not metabolized, meaning it passes through your body undigested and thus doesn’t provide calories or carbs (4). Splenda is the most common sucralose-based sweetener on the market and popular because it lacks the bitter taste found in many other artificial sweeteners (4). While sucralose itself is calorie-free, Splenda contains maltodextrin and dextrose, two carbs that supply about 3 calories and 1 g of carbs in each packet (5).
Unlike other types of sweeteners, sucralose may not be a suitable substitute for sugar in recipes that require baking. Some studies have found that sucralose could produce harmful compounds when exposed to high temperatures (6, 7). Instead, use sucralose as a low carb way to sweeten drinks or foods like oatmeal and yogurt and stick to other sweeteners for baking.
Splenda can be substituted for sugar in a 1:1 ratio for most recipes. However, pure sucralose is 600 times sweeter than regular sugar, so you’ll only need to use a tiny amount in place of sugar for your favorite foods (8).
Summary: Sucralose is an artificial sweetener that’s free of calories and carbs. Splenda, a popular sucralose-based sweetener, provides a small number of calories and carbs.
Erythritol
Erythritol is a type of sugar alcohol - a class of naturally occurring compounds that stimulate the sweet taste receptors on your tongue to mimic the taste of sugar (9). It’s up to 80% as sweet as regular sugar, yet it contains only 5% of the calories at just 0.2 calories per g (10). Additionally, though erythritol has 4 g of carbs per tsp (4 g), studies show that it may help lower blood sugar levels in your body (11, 12, 13). Moreover, due to its smaller molecular weight, it typically doesn’t cause the digestive issues associated with other types of sugar alcohols (14).
Read also: Coconut for Keto Diet
Erythritol is used in both baking and cooking and can be substituted for sugar in a wide variety of recipes. Keep in mind that it tends to have a cooling mouthfeel and doesn’t dissolve as well as sugar, which can leave foods with a slightly gritty texture. For best results, swap about 1 1/3 cups (267 g) of erythritol for each cup (200 g) of sugar.
Summary: Erythritol is a type of sugar alcohol that’s 80% as sweet as regular sugar with just 5% of the calories. Studies show that the carbs in erythritol don’t affect blood sugar the same way as regular sugar.
Xylitol
Xylitol is another type of sugar alcohol commonly found in products like sugar-free gum, candies, and mints. It’s as sweet as sugar but contains just 3 calories per g and 4 g of carbs per tsp (4 g) (15, 16). Yet, like other sugar alcohols, the carbs in xylitol don’t count as net carbs, as they don’t raise blood sugar or insulin levels to the extent that sugar does (17).
Xylitol can be easily added to tea, coffee, shakes, or smoothies for a low carb kick of flavor. It also works well in baked goods but may require a bit of extra liquid in the recipe, as it tends to absorb moisture and increase dryness. Because xylitol is as sweet as regular sugar, you can exchange it for sugar in a 1:1 ratio.
Note that xylitol has been associated with digestive problems when used in high doses, so scale back your intake if you notice any adverse effects (14). It is also important to note that even in small amounts, the substance is toxic to dogs.
Summary: Xylitol is a sugar alcohol that is as sweet as regular sugar. Because the carbs in xylitol don’t raise blood sugar or insulin levels the same way as sugar, they don’t count towards the total amount of net carbs.
Monk Fruit
As its name implies, monk fruit sweetener is a natural sweetener extracted from the monk fruit, a plant native to southern China (18). Monk fruit, also known as “luo han guo”, or Siraitia grosvenorii, is a fruit native to China. It contains natural sugars and compounds called mogrosides, which are antioxidants that account for much of the sweetness of the fruit (19). Depending on the concentration of mogrosides, monk fruit sweetener can be anywhere between 100-250 times sweeter than regular sugar (20).
Monk fruit extract contains no calories and no carbs, making it a great option for a ketogenic diet. One older study found that mogrosides may also stimulate the release of insulin, which can improve the transportation of sugar out of the bloodstream to help manage blood sugar levels (21).
Be sure to check the ingredients label when buying monk fruit sweetener, as monk fruit extract is sometimes mixed with sugar, molasses, or other sweeteners that can alter the total calorie and carb content. Monk fruit sweetener can be used anywhere you would use regular sugar. The amount you use can vary between different brands based on what other ingredients may be included. While some recommend substituting using an equal amount of monk fruit sweetener for sugar, others advise cutting the amount of sweetener in half.
Summary: Monk fruit sweetener is a natural sweetener that’s 100-250 times sweeter than sugar but contains no calories or carbs.
Yacon Syrup
Yacon syrup comes from the roots of the yacon plant, a tuber widely grown in South America. The sweet syrup of the yacon plant is rich in fructooligosaccharides (FOS), a type of soluble fiber that your body is unable to digest (22). It also contains several simple sugars, including sucrose, fructose, and glucose (23).
Since your body doesn’t digest a large portion of yacon syrup, it contains about half the calories of regular sugar, with just 7 calories per tsp, or 5 milliliters (mL) (24, 25). Additionally, though it has about 4 g of carbs per tsp (5 mL), studies show that the carbs in yacon syrup don’t affect blood sugar the way regular sugar does. In fact, both human and animal studies have found that yacon syrup may help reduce blood sugar and insulin levels to promote blood sugar control (26, 27). Some older studies show that Yacon syrup may improve insulin resistance and reduce body weight in people with obesity. FOSs may also positively impact several health conditions, including diabetes, cancers, and gut health.
Yacon syrup is best used as a sweetener in place of sugar in coffee, tea, cereal, or salad dressings. However, cooking with yacon syrup is not recommended, as the fructooligosaccharides can break down when exposed to high temperatures, according to some older research (28). Substitute yacon syrup using an equal amount in place of other liquid sweeteners like molasses, corn syrup, or cane juice.
Summary: Yacon syrup is a sweetener rich in fructooligosaccharides, a type of fiber that your body cannot digest. Human and animal studies suggest that yacon syrup may help lower blood sugar and insulin levels.
Sweeteners to Avoid on a Keto Diet
While there are plenty of options for low carb sweeteners you can enjoy on a ketogenic diet, there are many others that aren’t ideal. Here are a few sweeteners that are high in carbs, can increase blood sugar levels, and interrupt ketosis:
- Maltodextrin: This highly processed sweetener is produced from starchy plants like rice, corn, or wheat and contains the same amount of calories and carbs as regular sugar (29). Maltodextrin contains the same number of carbs as table sugar and may not be suitable for a keto diet. However, research suggests that maltodextrin has less impact on people’s oral hygiene than table sugar.
- Honey: High quality honey contains antioxidants and nutrients, making it a better choice than refined sugar. However, it’s still high in calories and carbs and may not be suitable for a keto diet (30). Honey may be a healthier alternative to table sugar due to its antioxidant properties. However, it contains a high amount of sugar and carbs, so people should avoid it when following a keto diet.
- Maple Syrup: Each serving of maple syrup packs a good amount of micronutrients like manganese and zinc but is also high in sugar and carbs (33). Maple syrup is another natural sweetener. It contains large amounts of sugar and carbs, so it is not suitable for a keto diet.
- Agave Nectar: Agave nectar is about 80% fructose, which can decrease your body’s sensitivity to insulin and contribute to metabolic syndrome, making it difficult for your body to regulate blood sugar levels (32, 34). Although a natural sweetener, agave nectar is almost 85% fructose, making it unsuitable for keto-friendly diets. Researchers have also found a link between fructose and obesity and type 2 diabetes.
- Dates: This dried fruit is often used to sweeten desserts naturally. Despite supplying a small amount of fiber, vitamins, and minerals, dates also contain a substantial amount of carbs (35). Dates have nutritional value, as they contain small amounts of protein and some vitamins and minerals such as potassium. However, they also contain 75 g of carbs per 100 g, so they may not be suitable for people on a keto diet.
Summary: Watch out for sweeteners that are high in sugar and carbs when following a ketogenic diet.
Understanding the Ketogenic Diet
Following a ketogenic diet involves cutting back on high carb foods like starches, desserts, and processed snacks. This is essential to reaching a metabolic state called ketosis, which causes your body to begin breaking down fat stores instead of carbs to produce energy (1). Ketosis also requires reducing sugar consumption, which can make it challenging to sweeten beverages, baked goods, sauces, and dressings.
Usually, carbohydrates form a person’s main source of energy. However, a keto diet works on the premise that if an individual eats very few carbs, their body will produce an alternative fuel source called ketones. On average, people in the United States eat around 200-350 grams (g) of carbs each day. A keto diet will reduce this amount to 20-50 g per day based on a 2,000 kcal a day diet. This dramatic reduction in carb intake forces the body to burn fat for energy.
People following a ketogenic diet consume a low carb, high fat diet with moderate protein. Many diets involve cutting down on carbohydrates and fat. However, individuals following a keto eating plan reduce their carbohydrate intake while increasing their fat intake, causing them to go into ketosis.