The main types of carbohydrates

Function, deficiency symptoms and natural sources

Carbohydrates are among the body's most important energy sources. The brain and muscles, in particular, depend on a continuous supply of glucose. But carbohydrates do much more than just provide energy. They influence the immune system, digestion, hormone balance, and overall metabolism.

In a balanced diet, it's not just the quantity but also the quality of carbohydrates that matters. Natural, preferably unprocessed sources provide not only energy but also fiber, vitamins, minerals, and phytochemicals.

Simple sugars (monosaccharides)

Function:
Glucose, fructose, and galactose are the smallest building blocks of carbohydrates. Glucose is the main energy source for the brain, red blood cells, and many other body cells.

Shortage:
An acute glucose deficiency can lead to dizziness, irritability, difficulty concentrating and, in severe cases, loss of consciousness.

Overconsumption:
Sustained high consumption often leads to weight gain, insulin resistance and an increased risk of diabetes and cardiovascular disease.

Sources:
Fresh fruit, berries, honey, and in smaller quantities vegetables and milk (via lactose)

Double sugars (disaccharides)

Function:
Disaccharides consist of two linked simple sugars and are broken down in the digestive tract. They provide short-term energy.

Shortage:
Rarely. However, a deficiency of enzymes such as lactase can lead to intolerances, such as lactose intolerance.

Overconsumption:
Too much of it promotes obesity, tooth decay and causes blood sugar levels to fluctuate greatly.

Sources:
Household sugar, dairy products, malt beverages and baked goods

Complex sugars (polysaccharides)

Function:
Long-chain carbohydrates provide consistent energy over a longer period of time. They stabilize blood sugar levels and sustainably nourish the body.

Shortage:
Too little consumption can lead to exhaustion, lack of motivation, and difficulty concentrating. Physical performance can also decrease.

Overconsumption:
Too many isolated starch sources without fiber (e.g. white bread) can contribute to weight gain and blood sugar fluctuations.

Sources:
Whole grains, potatoes, brown rice, oats, corn, legumes

Fiber

Function:
Fiber is one of the indigestible carbohydrates. It promotes intestinal health, regulates digestion, and has a positive effect on blood sugar and cholesterol levels.

Shortage:
Constipation, an increased risk of intestinal diseases, poor blood sugar regulation and insufficient satiety can result.

Overconsumption:
Very high amounts, especially without adequate fluid intake, can cause bloating, fullness and digestive problems.

Sources:
Whole grain products, fruits, vegetables, legumes, nuts and seeds

Resistant starch

Function:
Resistant starch is not digested in the small intestine but fermented in the large intestine. There, it serves as food for healthy intestinal bacteria and promotes the formation of short-chain fatty acids, which have anti-inflammatory effects.

Shortage:
A deficiency can impair the diversity of the intestinal flora and, in the long term, be associated with a higher risk of metabolic diseases.

Overconsumption:
Sensitive people may temporarily experience flatulence.

Sources:
Cooled boiled potatoes or rice, green bananas, pulses, oatmeal

Glycogen

Function:
Glycogen is the storage form of glucose in the liver and muscles. It is mobilized when energy is needed in the short term, for example, during exercise or longer breaks between meals.

Shortage:
A glycogen deficiency manifests itself in a drop in performance, muscle exhaustion and rapid fatigue.

Sources:
Glycogen itself is not absorbed through food. It is produced by a sufficient intake of carbohydrates, such as whole grains, fruits, vegetables, or legumes.

Conclusion

Carbohydrates are essential for mental and physical performance. It's not about whether you eat a lot or a few carbohydrates, but rather which ones. Complex, fiber-rich sources from whole foods provide energy without disrupting your metabolism.

A plant-based diet provides high-quality carbohydrates in their natural form, supplemented by fiber, vitamins, and phytochemicals. Regularly consuming whole grains, vegetables, legumes, and resistant starch creates an optimal foundation for health, satiety, and performance.

Conscious use of simple sugars, avoiding highly processed products and deliberately incorporating fiber-rich foods support the intestines, the immune system and the stability of blood sugar levels, regardless of the chosen diet.