# Nutrition and diets in mitochondrial diseases
Mitochondrial diseases affect the energy metabolism of cells. Because nutrition is directly linked to energy production, nutritional choices take on extra significance in these diseases. This tab describes which dietary patterns and diets are scientifically studied and what is known about them.
Protein-rich nutrition
ResearchediPositive results in clinical studies, not yet standard treatment
In high-protein nutrition, the proportion of proteins is higher than in a standard diet. This may mean that more of daily energy comes from animal or plant-based proteins. The idea behind high-protein nutrition in mitochondrial diseases is that certain amino acids (building blocks of proteins) are involved in restoring mitochondrial function and building muscle tissue, which is damaged in many mitochondrial diseases.
From cell research and animal studies, it is known that certain amino acids such as carnitine and CoQ10-supporting substances play a role in mitochondrial metabolism. In people with mitochondrial muscle weakness, it has been observed that adequate protein intake can help maintain muscle strength. However, large prospective studies on optimal protein doses specifically in mitochondrial diseases are lacking. What is clear from general nutrition research: plenty of physical activity combined with sufficient protein intake contributes to maintaining muscle mass.
A risk of increased protein intake for some patients may be that certain metabolic breakdown products accumulate. This depends heavily on the specific mitochondrial defect and how it processes certain amino acids. This should always be discussed with your healthcare provider.
Mediterranean dietary pattern
ResearchediPositive results in clinical studies, not yet standard treatment
The Mediterranean pattern emphasizes vegetables, fruit, nuts, olive oil, fish and limited use of red meat. The pattern is known for strong anti-inflammatory and antioxidative properties. Because chronic inflammation and oxidative stress both play a role in mitochondrial diseases, researchers are investigating interest in this pattern.
Recent studies (2026) show that certain nutritional components from the Mediterranean pattern — particularly substances in vegetables and nuts — help prevent mitochondrial damage and strengthen the cell's ability to repair itself. One study emphasizes that these effects become particularly visible through the interaction of multiple active substances. For patients with mitochondrial diseases, a dietary pattern rich in vegetables, nuts and healthy fats can therefore help limit further cell damage.
Caution is warranted when certain vegetables contain heavy metals that can further disrupt mitochondrial function; this varies by region and must be assessed individually.
Ketogenic diet
ExperimentaliOngoing in study setting, outcome still unknown
A ketogenic diet is very high in fat and very low in carbohydrates, causing the body to burn fat instead of glucose and produce so-called ketone bodies. For certain neurological conditions, such as epilepsy, this diet has been used for a long time.
In mitochondrial diseases, there is theoretical interest, because ketone bodies are an alternative energy source that does not need to go through normal mitochondrial metabolism. For certain types of mitochondrial diseases (especially complex defects), this could therefore be a bypass. However, for mitochondrial diseases, the evidence is still very limited and consists mainly of small case reports and animal research. A single study suggests that in very specific mitochondrial defects (such as MELAS or certain complex I deficiencies), careful experimentation with ketogenic diet under strict medical supervision may have benefit, but this must always be done under close supervision of the healthcare provider.
Risks are considerable: a ketogenic diet can lead to elevated lactic acid in the blood (metabolic acidosis), which can actually be detrimental in certain mitochondrial diseases. Additionally, the diet can cause deficiencies in certain nutrients. This diet must not be initiated independently.
Antioxidant-rich nutrition
ResearchediPositive results in clinical studies, not yet standard treatment
Nutrition rich in antioxidants contains many substances that can neutralize free radicals (such as vitamins C and E, polyphenols from berries and vegetables). Because mitochondrial diseases are accompanied by increased oxidative stress — an accumulation of harmful molecules that damage cells — scientists are investigating whether antioxidant-rich nutrition can slow this process.
Recent studies (2026) show that certain plant-derived substances (including from cruciferous vegetables such as cabbage and broccoli, and from spices such as cinnamon) provide evidence of being able to restore mitochondrial function and reduce inflammation. Research into certain antioxidants (such as selenium-containing proteins) also indicates that these are involved in protection against mitochondrial damage. Another study shows that certain polysaccharides (complex sugars from plant material) can create favorable metabolic conditions through changes in gut bacteria.
There is a risk that excessive antioxidants may paradoxically work in some situations; here too it applies that nutritional choices are tailored to the individual. It is also important to distinguish between what works in the laboratory and what is relevant in actual patients.
Intermittent fasting and periodic fasting
ExperimentaliOngoing in study setting, outcome still unknown
Intermittent fasting means that you do not consume food during certain periods, for example: eating only within a certain window (for example 12:00–20:00) or fasting on certain days. This pattern can influence how mitochondria adapt and recover.
In cell research and in laboratory animals, it has been observed that periodic food breaks can activate certain "recovery" processes in cells. In a very recent study (2026) on cardiorespiratory fitness and mitochondrial functions, data are presented that suggest certain training patterns (with adapted nutrition) can stimulate mitochondrial adaptations. However, for mitochondrial diseases, randomized studies on fasting or intermittent patterns are virtually absent.
This is a risky area: many patients with mitochondrial diseases have energy-metabolic disorders and cannot tolerate long periods without food. Fasting periods can also lead to metabolic dysregulation. This type of nutritional pattern should only be considered under very close supervision of the treating physician.
Gluten-free diet
UnproveniNo scientific evidence that it works
Gluten-free nutrition avoids gluten (protein from grains). For certain neurological conditions, there is evidence that gluten can cause neurological sensitivity. In mitochondrial diseases, it is sometimes suggested that gluten-free eating can help.
To date, there is no direct scientific evidence that a gluten-free diet improves mitochondrial diseases, unless the patient also has coeliac disease or gluten sensitivity. Only for patients with demonstrable gluten-related conditions would gluten-free nutrition be worthwhile. For others, scientific foundation is lacking.
---
**Summary: nutrition as tailored treatment**
Nutritional choices in mitochondrial diseases are heavily dependent on the specific type of disease, the phases you are in, which organs are involved, and which treatments you are undergoing. What may be beneficial for one patient can be harmful for another. It is therefore essential that nutritional decisions are always discussed with your physician or a specialized dietitian who has knowledge of mitochondrial diseases. They can determine which nutritional patterns suit your individual situation and which risks are relevant.
_This information never replaces a doctor's judgment. Always discuss your situation with your own healthcare provider._