According to the Dietary Guidelines for Americans 2010-2015, on average, Americans consume 17 teaspoons (tsp) of added sugar each day. This adds up to 270 calories.
However, the guidelines advise that people limit added sugars to less than 10% of their daily calorie intake. For a daily intake of 2,000 calories, added sugar should account for fewer than 200 calories.
However, in 2015, the World Health Organization (WHO) advised that people eat half this amount, with no more than 5% of their daily calories coming from added sugar. For a diet of 2,000 calories per day, this would amount to 100 calories, or 6 tsp, at the most.
Symptoms of eating too much sugar
Some people experience the following symptoms after consuming sugar:
- Low energy levels: A 2019 study found that 1 hour after sugar consumption, participants felt tired and less alert than a control group.
- Low mood: A 2017 prospective study found that higher sugar intake increased rates of depression and mood disorder in males.
- Bloating: According to Johns Hopkins Medicine, certain types of sugar may cause bloating and gas in people who have digestive conditions, such as irritable bowel syndrome (IBS) or small intestinal bacterial overgrowth (SIBO).
Risks of eating too much sugar
Consuming too much sugar can also contribute to long-term health problems.
Tooth decay
Sugar feeds bacteria that live in the mouth. When bacteria digest the sugar, they create acid as a waste product. This acid can erode tooth enamel, leading to holes or cavities in the teeth.
People who frequently eat sugary foods, particularly in between mealtimes as snacks or in sweetened drinks, are more likely to develop tooth decay, according to Action on Sugar, part of the Wolfson Institute in Preventive Medicine in the United Kingdom.
Acne
A 2018 study of university students in China showed that those who drank sweetened drinks seven times per week or more were more likely to develop moderate or severe acne.
Additionally, a 2019 study suggests that lowering sugar consumption may decrease insulin-like growth factors, androgens, and sebum, all of which may contribute to acne.
Weight gain and obesity
Sugar can affect the hormones in the body that control a person’s weight. The hormone leptin tells the brain a person has had enough to eat. However, according to a 2008 animal study, a diet high in sugar may cause leptin resistance.
This may mean, that over time, a high sugar diet prevents the brain from knowing when a person has eaten enough. However, researchers have yet to test this in humans.
Diabetes and insulin resistance
A 2013 article in PLOS ONE, indicated that high sugar levels in the diet might cause type 2 diabetes over time.
The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) add that other risk factors, such as obesity and insulin resistance, can also lead to type 2 diabetes.
Cardiovascular disease
A large prospective study in 2014 found that people who got 17–21% of their daily calories from added sugar had a 38% higher risk of dying from cardiovascular disease (CVD) than those who consumed 8% added sugars. For those who consumed 21% or more of their energy from added sugars, their risk for CVD doubled.
High blood pressure
In a 2011 study, researchers found a link between sugar-sweetened beverages and high blood pressure
, or hypertension. A review in Pharmacological Research states that hypertension is a risk factor for CVD. This may mean that sugar exacerbates both conditions.
Cancer
Excess sugar consumption can cause inflammation, oxidative stress, and obesity. These factors influence a person’s risk of developing cancer.
A review of studies in the Annual Review of Nutrition found a 23–200% increased cancer risk with sugary drink consumption. Another study found a 59% increased risk of some cancers in people who consumed sugary drinks and carried weight around their abdomen.
Aging skin
Excess sugar in the diet leads to the formation of advanced glycation end products (AGEs), which play a role in diabetes. However, they also affect collagen formation in the skin.
According to Skin Therapy Letter, there is some evidence to suggest that a high number of AGEs may lead to faster visible aging. However, scientists need to study this in humans more thoroughly to understand the impact of sugar in the aging process.
How to eat less sugar
A person can reduce the amount of added sugar they eat by:
- checking food labels for sweeteners
- reducing foods with added sugar
- avoiding processed foods in general
Checking food labels
Added sugar and sweeteners come in many forms. Ingredients to look out for on a food label include:
- brown sugar
- fructose
- glucose
- sucrose
- maltose
- honey
- corn sweetener
- corn syrup
- high fructose corn syrup
- raw sugar
- molasses
- malt syrup
- evaporated cane juice
- agave nectar
- maple syrup
- invert sugar
- fruit juice concentrates
- trehalose
- turbinado sugar
Some of these ingredients are natural sources of sugar and are not harmful in small amounts. However, when manufacturers add them to food products, a person might easily consume too much sugar without realizing it.
Reducing foods that contain added sugar
Some food products contain large amounts of added sugars. Reducing or removing these foods is an efficient way to reduce the amount of sugar a person eats.
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