Attention deficit hyperactivity disorder (ADHD) is not caused by diet alone.
However, research shows that reactions to food may worsen many people's ADHD symptoms.
For this reason, certain dietary changes may help you manage symptoms.
In fact, one diet has been shown to improve symptoms in up to 50–82 percent of children with ADHD.
This article explains what this diet is and how to follow it.
What is ADHD and Does Diet Play a Role?
ADHD is characterized by inattention, impulsiveness and hyperactivity.
As there is no cure for ADHD, most treatments aim to manage symptoms. The most popular treatments involve behavioral therapy and medication, but research has also been done on dietary interventions (8, 9).
Two main types of studies have looked into the effects of diet on ADHD symptoms:
- Supplement studies: These studies look into the effects of dietary supplements like omega-3 fatty acids, amino acids, vitamins or minerals.
- Elimination studies: These studies look into the effects of eliminating certain foods, additives or ingredients from the diet.
For a detailed review of these studies, check out this article: Does Nutrition Play a Role in ADHD?
However, it should be noted that dietary modification as a treatment for ADHD is still viewed as controversial.
Bottom Line: ADHD is a common behavioral disorder. While therapy and medication remain the most common treatments, research shows that an elimination diet can help some people manage symptoms.
The Few Foods Elimination Diet for ADHD
The main elimination diet used in ADHD research is the Few Foods Diet.
It follows the same principles as other elimination diets, but is generally less restrictive.
Here's how the Few Foods Diet works:
- Elimination: For 1-5 weeks, follow a diet consisting only of foods that are not likely to trigger adverse reactions. If symptoms improve, enter the second phase.
- Reintroduction: Every 3-7 days, reintroduce foods that may cause symptoms. If adverse effects occur, the food is considered to be “sensitizing."
- Treatment: Develop a personal diet plan that avoids sensitizing foods as much as possible, to help minimize your child's symptoms.
Bottom Line: The Few Foods Diet is a three-phase approach to identifying and eliminating foods that may worsen ADHD symptoms.
Health Benefits of the Few Foods Diet
Twelve studies have examined the effects of the Few Foods Diet on symptoms of ADHD.
Five of these were uncontrolled trials, while seven were randomized, controlled trials.
Many of the children also reported fewer headaches, stomach aches, fits, muscle pains and nasal symptoms. Parents reported fewer problems with sleeping and fewer nighttime awakenings in their children (16, 17, 18, 19).
In one of the studies, these effects were even noticeable on a brain scan when the children ate a sensitizing food (21).
Bottom Line: The Few Foods Diet has been shown to decrease ADHD symptoms for some children—often more than half. Less headaches, fits and sleeping problems have also been reported.
What to Eat on the Few Foods Diet
For 1–4 weeks, only eat the foods listed below. If you don't notice improvements to symptoms after 1–2 weeks, you may want to discontinue the diet.
However, the length of this period differs.
Some people see symptoms improve greatly in the first three days, while others don't experience improvements until the second week.
Which Foods Should You Eat?
- Fat: Sunflower and rapeseed oil.
- Green vegetables: Brussels sprouts, spinach, artichokes, cabbage, bamboo shoots, broccoli, bok choy, asparagus and cucumbers.
- Other vegetables: Mushrooms, cauliflower, onions, leeks, garlic, radishes, squash, pumpkin, zucchini, beets and root vegetables.
- Spices: Rice vinegar, balsamic vinegar, iodized salt, turmeric, curry powder, basil, dill, oregano, parsley, rosemary, thyme, tarragon and coriander.
- Drinks: Enriched rice milk, carbonated water, tea (except for vanilla, peppermint, cinnamon, fruit or licorice tea), pear juice, homemade juices and smoothies.
- Other foods: Tapioca, rice bran, rice flour, potato flour, baking soda, xanthan gum, baking powder, arrowroot and ginger.
Which Foods Should You Avoid?
- Tree nuts.
Which Food Additives Should You Avoid?
Bottom Line: Stick to the foods on this list as much as possible. However, more moderate restriction may also help improve symptoms.
Sample Menu on the Few Foods Diet
Many people find it easier to stick to this diet when they have a meal plan to follow.
You can make many delicious meals on the Few Foods Diet.
Here are some menu ideas for the Few Foods Diet:
- Breakfast: Rice flake porridge and a piece of fruit, juice or a smoothie.
- Lunch: Rice noodles, rice pasta, risotto or chicken salad.
- Dinner: Soup with rice or potato flour bread / meat, potatoes and vegetables.
- Snacks: Rice cakes and tea / fresh cut veggies with balsamic dip.
- Treats: Dried pears and bananas / potato chips made with sunflower or rapeseed oil.
Bottom Line: Having a meal pattern to follow can help you stick to the Few Foods Diet. You may even want to plan out your meals for the week.
How to Reintroduce Foods
The chart below shows how to reintroduce foods into your diet.
However, it's only one sample and this can be done in many ways. It may also be helpful to keep a diary.
Reintroduce foods every 3–7 days and try to eat the new food twice during the day.
Bottom Line: Introduce a new food every 3–7 days and try to eat it twice in a day. It may be helpful to reintroduce foods on Tuesdays and Fridays, but this is just one reintroduction method.
Advice for Implementing the Few Foods Diet
Following a restricted diet is hard. It may be especially challenging to get your child to stick to a limited diet.
Here is some advice on how to implement the Few Foods Diet:
- Stock up on food: Always keep healthy food in the pantry and with you on the go. A banana or a few rice cakes can be life savers on a diet like this.
- Plan ahead: Keep an emergency meal in the freezer, such as chicken, rice and vegetables. Having banana muffins on hand is also a good idea.
- Make and store broth: Make your own broth and store it in ice cube trays in the freezer. You will use it a lot for making sauces and adding flavor to dishes.
- Freeze spices: Freeze fresh spices, like basil or coriander, in ice cube trays along with rapeseed or sunflower oil. This keeps spices fresh and makes it easy for you to add them to meals.
- Rinse your rice: Try to rinse your rice before you use it and choose Indian rice over American rice to avoid arsenic contamination.
Bottom Line: Meal prepping, keeping snacks with you on the go and making broth are all things that have helped people stick to this diet.
Who Is More Likely to Respond to the Diet?
- Atopy or an atopic condition.
- Sleep problems.
- Frequent food cravings.
- Family history of migraines.
Bottom Line: Younger children and children with problems such as allergies, sleep issues and food cravings are more likely to respond to the Few Foods Diet.
The Few Foods Diet is Not for Everyone
The Few Foods Diet may not work for all people, for several reasons.
First, it's hard to follow. It also requires a lot of planning and a strong will. The first three days are usually the hardest and are when most people give up.
Additionally, the Few Foods Diet is a tool to rule out foods that may affect ADHD symptoms. It is not intended to be followed for longer than 4 weeks.
Restricting foods for too long can lead to nutrient deficiencies and other issues. If possible, it's best to have a health professional supervise the diet.
Lastly, not everyone sees improvements on the Few Foods Diet. Research shows that while it does work for more than 50 percent of people, some people simply don't respond.
Bottom Line: The Few Foods Diet is only intended to be used temporarily and may not work for everyone. If possible, have a health professional supervise the diet.
Take Home Message
Studies have shown that the Few Foods Diet can improve ADHD symptoms for more than 50 percent of children.
Exactly how this works is unknown, but it may be due to allergies or food sensitivities.
The Few Foods Diet can help you identify and remove these problematic foods, leading to improved symptoms and a better quality of life.
This article was reposted from our media associate Authority Nutrition.
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