The keto diet is popular for rapid weight loss. However, such a diet can create adverse reactions in the body. Many young people begin the keto diet on their own without seeking advice from a specialist dietitian, which can be extremely dangerous.
What is the
Keto Diet?
The keto or ketogenic diet is a high-fat,
low-carbohydrate, and moderate-protein eating pattern. The main goal of this
diet is to bring the body into a metabolic state called “ketosis,” where the
body uses fat instead of carbohydrates as its primary source of energy.
Typically, daily carbohydrate intake must be reduced to below 5–10%, while fat
intake should be around 60–70%. As a result, foods like bread, rice, pasta,
potatoes, sugar, fruits, and even many types of vegetables must be avoided. On
the other hand, high-fat foods such as meat, eggs, butter, ghee, cheese, nuts,
and olive oil are consumed in larger amounts. Although many people follow the
keto diet for quick weight loss, this eating pattern comes with serious risks
and negative effects that can unknowingly lead to major health problems.
Negative and
Harmful Effects
First,
due to very low carbohydrate intake, the first few days or weeks often cause
symptoms known as “keto flu.” These include headaches, fatigue, nausea,
dizziness, excessive loss of fluid, lack of concentration, irritability, and
sleep problems. The body takes time to shift from using carbohydrates to
burning fat for energy. During this physiological adjustment, many people feel
extremely weak. Additionally, an imbalance of sodium, potassium, and magnesium
in the body can lead to muscle cramps, spasms, and irregular heartbeat.
Second,
long-term keto dieting can put stress on the liver and kidneys. Since this diet
involves high fat and moderate protein, the liver must work harder to break
down fat for energy. If someone already has liver issues, the keto diet may
worsen the condition. Similarly, excess protein intake increases pressure on
the kidneys’ filtering system, especially for individuals with weak kidneys or
diabetes. Studies show that long-term keto dieting increases the risk of kidney
stones because high calcium levels cause crystals to form in the urine.
Third, this diet often excludes fruits, many vegetables, grains, and legumes—foods that are essential sources of fiber, vitamins, and minerals. Low fiber intake commonly leads to constipation. A lack of vitamin C, B-complex vitamins, potassium, magnesium, and antioxidants can weaken immunity in the long term. As a result, infections, skin problems, hair fall, and brittle nails may occur. Very low carbohydrate intake may also cause depression, mood swings, and reduced cognitive performance.
Fourth,
many think the keto diet is good for the heart because it is low in
carbohydrates. But in reality, consuming excessive fat can increase cholesterol
levels. High intake of saturated fats raises LDL or “bad cholesterol,” which
increases the risk of heart disease, heart attack, or stroke. Research shows
that many long-term keto followers experience higher cholesterol and fat
buildup in arteries. Therefore, the diet may be dangerous for individuals at
risk of heart disease.
Fifth,
the keto diet can also have negative social and psychological effects. Because
the food list is very limited and many common foods are restricted, people
often struggle to follow it during social gatherings or family meals. This reduces
the joy of eating and may lead to stress or feelings of isolation. Strict
dieting can also promote unhealthy eating behaviors or increase the risk of
eating disorders.
Sixth,
the keto diet is not effective for everyone. Some people lose weight quickly,
while others struggle to adapt. When the diet is stopped and normal eating
resumes, weight often comes back rapidly, as carbohydrates cause the body to
retain water and calorie intake increases again. This leads to the “yo-yo
effect”—repeated cycles of weight loss and gain—which is harmful to overall
health.
Risks of the
Keto Diet
The keto diet is particularly risky for pregnant
women, breastfeeding mothers, individuals with hormonal imbalance, and patients
with arthritis. In growing age, this diet can disrupt the menstrual cycle in
females, potentially causing infertility later. No one should follow the keto
diet without expert advice.
Many people begin this diet solely based on
information from the internet. However, starting the keto diet without understanding
the body’s needs can be a harmful, self-destructive decision. By following a
balanced diet along with regular exercise as recommended by a healthcare
specialist, achieving good health is not difficult.
Conclusion
Before starting the keto diet, it must be
remembered that it is an extremely strict and restrictive eating pattern. Not
everyone can follow it—especially pregnant women, diabetics, kidney or liver
patients, heart patients, children, and adolescents are generally advised to
avoid this diet. Many experts believe that the risks of long-term keto dieting
outweigh its benefits. Therefore, instead of using it as the only method of
weight loss, adopting a balanced diet, regular exercise, and a healthy
lifestyle is the safest and most sustainable approach.
