- Author: Dr Helen Lawal
- Read time: 5 minutes
Protein & ADHD: How Much To Eat & Why It Benefits Your Health
Discover how high-protein meals and ADHD-friendly protein breakfasts support focus, energy and mood. Learn whether protein helps ADHD and find easy high-protein snacks.
Do High-Protein Meals Help ADHD?
Everybody is talking about protein! You might be thinking – is this another food fad or trend, or is there science and truth behind the fuss?
If you have ADHD, you probably already know you “should” eat more protein – but actually doing it is a different story because ADHD can make healthy eating feel really overwhelming and meal planning doesn’t sound enticing for your dopamine-seeking brain.
Many ADHDers I work with struggle with:
- Forgetting to eat
- Relying on carbs and sugar for quick energy
- Ignoring hunger then suddenly and urgently needing food
- Struggling to cook when overwhelmed
- Decision fatigue around “what to eat”
- Emotional eating when stressed, bored or low
- Grabbing easy snacks instead of meals
- Reduced or ignored hunger cues
Often this can mean that you are not eating as much protein as your body needs for overall health, leaving you low in energy, hungry and not as healthy as you would like to be.
- Read more about my work with ADHD UK: Dr Helen Lawal – ADHD UK
Why Protein Matters for ADHD
Firstly, it’s important not to treat ADHD as a “weird” condition that needs a special diet. Yes, there are differences in brain chemistry (dopamine, noradrenaline, GABA etc.) and structure (as evidenced on brain scans), but the key point is this: we all need a healthy, balanced diet, ADHD or not. There is no specific diet that has been shown to cure or treat ADHD in adults.
Research supports the benefits of balanced eating that includes enough protein, although there’s no clear evidence yet on exactly how much protein people with ADHD need, or if we need more or a specific amount. So I’ll reference the studies and research we do have on non-ADHD populations with key considerations relevant to ADHD.
- Read: ADHD, Overwhelm and Food: Why Eating Healthily Feels Hard
Why High-Protein Meals Matters So Much
Protein is made up of amino acids. They both have multiple vital roles in the body, including:
Structure: building muscle, collagen and elastin
Transport: carrying nutrients (for example, albumin in blood plasma)
Hormones: producing non-steroid hormones such as adrenaline
Enzymes: supporting thousands of reactions in your body
Immunity: creating antibodies to fight infection
Fluid balance: maintaining osmotic pressure in cells
- Read: Protein & ADHD: How Much To Eat & Why It Benefits Your Health
Essential vs Non-Essential Amino Acids: What You Need to Know to Support Focus & Energy
Essential amino acids are those that must be acquired from the diet because they cannot be synthesised within the body.
There are nine essential amino acids.
Three of these are called branched-chain amino acids:
- Leucine
- Valine
- Isoleucine
Why Leucine Matters for Protein
Leucine is particularly important because it triggers muscle protein synthesis.
Muscle growth is important for:
- Fitness goals
- Training goals
- Minimising the speed of ageing
We want to prevent sarcopenia, which is loss of muscle mass, especially post-menopause.
To support this, we need to help the body synthesise muscle protein, and this requires adequate dietary protein.
If you have adequate amounts of protein in your diet, this is enough to support an increase in muscle growth.
Leucine on its own is not enough – without the full range of essential amino acids, it will not have the same effect.
The learning point is that it is really important to get a variety of protein in the diet to ensure the full range of essential amino acids.
Complete vs Incomplete Proteins
Complete proteins contain all essential amino acids in adequate amounts.
If you are eating these foods, you do not need to worry about essential amino acids or branched-chain amino acids separately.
Examples of complete proteins include:
- Chicken
- Pork
- Beef
- Fish
- Soy – really important to incorporate this if you are vegetarian
Incomplete proteins are deficient in one or more essential amino acids.
These are typically plant-based proteins, such as:
- Beans
- Pulses
If you are vegetarian, it is important to eat a variety of these incomplete proteins across the day to ensure you get the full range of essential amino acids.
A mixed diet with good protein diversity is essential.
If we are missing or low in certain amino acids, this can impact:
- Protein synthesis
- The ability to develop new tissue
Why You Might Not Be Eating Enough Protein With ADHD
Many people with ADHD find it hard to plan meals, remember to eat or cook when feeling overwhelmed. This can lead to missed meals, snacking, sugar cravings and eating processed foods or takeaways, which can predispose to nutrient gaps, including vitamins, minerals, fibre and protein.
The goal is to make sure your brain and body get a good balance of nutrients through a varied diet with enough protein to support energy, appetite and blood sugar regulation.
Prioritising regular meals and snacks helps keep energy and blood sugar more stable through the day. Protein-rich foods can reduce the blood sugar dips that make us feel less irritable, more focused and calmer.
Protein Metabolism
When you eat protein, enzymes called proteases and peptidases break it down into amino acids. These amino acids form a pool in your blood and body fluids. From this pool, your body can build and repair:
- Muscle and connective tissue
- Collagen, enzymes, hormones and antibodies
If they’re not used, they can be broken down and reused elsewhere. There’s also a process called deamination, where amino acids are broken down into ammonia and urea, which you excrete in urine.
The goal is to have a good variety and adequate amount of amino acids available when needed.
There is still so much we need to learn about ADHD and protein and the relevance. A new Mendelian-randomisation study of over 870 plasma metabolites and nearly 293,000 individuals with or without ADHD found that 20 blood metabolites were associated with a lower risk of ADHD. The study does not measure dietary protein, but it does measure metabolites that are downstream products of amino acid (protein) metabolism. The researchers also identified that some of these metabolites are modifiable by drugs, suggesting potential therapeutic targets, and noted that genetic liability to ADHD may influence the abundance of many other metabolites. In short, this work supports a causal role for metabolic pathways in ADHD susceptibility and hints that metabolite-based interventions might one day help with prevention or treatment.
- Read: Protein & ADHD: How Much To Eat & Why It Benefits Your Health
Key Benefits of Protein for Supporting Focus & Energy
1. Supports Weight Loss
Protein has a much higher thermic effect of food (TEF) than carbohydrates or fats, meaning your body burns more calories digesting it. It increases satiety, helping you feel full and satisfied after a meal. These two effects play a key role in successful and sustainable weight loss (alongside being in a calorie deficit).
2. Supports Muscle Maintenance and Growth
Protein is an important part of muscle retention, especially as we age or go through menopause. Resistance training has an even greater effect, but combining it with protein intake is most effective. As we age, muscles become less sensitive to lower doses of amino acids, so maintaining protein intake matters more.
3. Strengthens Hair, Skin and Immunity
Keratin, a structural protein, supports hair and skin health. Protein also plays a key role in immune function, helping the body fight illness and recover faster.
4. Neurotransmitters
Amino acids are the building blocks of neurotransmitters like dopamine and serotonin. Two amino acids – tryptophan and tyrosine – are important building blocks of neurotransmitters. Serotonin is made from tryptophan. Dopamine, epinephrine and norepinephrine are made from tyrosine. Tryptophan is an essential amino acid – the body does not make it; it must be supplied by the diet.
How Much Protein Should I Eat Per Day?
The big question is how much protein do we need each day to be healthy?
Historically, the daily Recommended Nutritional Intake (RNI) in the UK and other Western countries is 0.75 g per kilogram of body weight per day. But more recent research suggests we need much higher levels than we may have previously been advised.
For the general population, for optimal health, research supports a range of 1.2 to 1.6 grams per kilogram of body weight.
If you are aiming to lose weight, you would use your ideal body weight to calculate this.
Protein Intake for Different Needs
General population | 1.2 – 1.6 g/kg |
Weight loss (use ideal body weight) | 1.2 – 1.6 g/kg |
Endurance athletes | 1.2 – 1.7 g/kg |
Bodybuilders | 1.8 – 2.7 g/kg |
Pregnant, breastfeeding or menopausal | upper end of range |
All of this depends on your body composition, whether you’re doing any sport, and if you are breastfeeding, pregnant or menopausal.
How to Calculate Your Daily Protein Target
If you weigh 70 kg, for example:
1.2 g/kg × 70 kg = 84 g protein per day
1.6 g/kg × 70 kg = 112 g protein per day
Daily protein target range: 84–112 g
How to Calculate Your Daily Protein Target
Total daily protein intakes around 1.2–1.6 g per kg of body weight are optimal for most adults when spread across the day. When divided over 3–4 meals, this works out to roughly 20–30 g of protein per meal for many people.
Example at 84 g per day:
- Breakfast: 25 g
- AM snack: 5–8 g
- Lunch: 25 g
- PM snack: 5–8 g
- Evening meal: 25 g
FREE DOWNLOAD
Download my free ADHD Protein Snack Swaps below to make this easier and get simple ideas you can use straight away.
- → Download my ADHD Protein Snack Swap
References (Harvard)
Shi, S., Baranova, A., Cao, H. and Zhang, F. (2025) Exploring causal associations between plasma metabolites and attention-deficit/hyperactivity disorder. BMC Psychiatry, 25, 498. https://doi.org/10.1186/s12888-025-06951-9
Nunes, E.A., et al. (2022). Systematic review and meta-analysis of protein intake to support muscle mass and function in adults. Nutrients, 14(6), 1248. https://doi.org/10.3390/nu14061248
Tagawa, R., et al. (2021). Dose–response relationship between protein intake and muscle protein synthesis in healthy adults: A systematic review. Nutrients, 13(2), 401. https://doi.org/10.3390/nu13020401
Schoenfeld, B.J. & Aragon, A.A. (2018). How much protein can the body use in a single meal for muscle-building? Journal of the International Society of Sports Nutrition, 15, 10. https://doi.org/10.1186/s12970-018-0215-1
Moore, D.R., et al. (2009). Ingested protein dose response of muscle and albumin protein synthesis after resistance exercise in young men. American Journal of Clinical Nutrition, 89(1), 161–168. https://doi.org/10.3945/ajcn.2008.26401
Areta, J.L., et al. (2013). Timing and distribution of protein ingestion during prolonged recovery from resistance exercise alters myofibrillar protein synthesis. Journal of Physiology, 591(9), 2319–2331. https://doi.org/10.1113/jphysiol.2012.244897
