The Anti-Inflammatory Mechanism Is Real Concussion triggers a neuroinflammatory cascade that drives most persistent symptoms. The initial mechanical injury damages neurons, but the inflammatory response that follows causes the headache, brain fog, fatigue, and sensory sensitivity that define the concussion experience. Reducing this inflammation is the therapeutic target. Low carbohydrate diets reduce systemic inflammation through multiple pathways, which is why some concussion patients report significant symptom improvement after dietary change (Prins et al., 2014). Carbohydrate restriction lowers circulating insulin levels. Chronically elevated insulin promotes inflammatory cytokine production (IL-6, TNF-alpha, CRP). Reducing insulin reduces these inflammatory mediators. The brain is particularly sensitive to systemic inflammation because the blood-brain barrier becomes more permeable after concussion, allowing peripheral inflammatory molecules to reach neural tissue that is already inflamed from the injury. Blood sugar stability matters as much as total carbs. The post-concussion brain is metabolically vulnerable. Blood sugar spikes and crashes create additional metabolic stress on neurons that are already struggling to maintain energy production. Low carb diets eliminate the glucose rollercoaster, providing steadier energy delivery. This stability reduces the headache and brain fog flare-ups that many concussion patients notice after high-carb meals. How Ketones Help the Injured Brain After concussion, the brain's ability to use glucose efficiently is impaired. The injury disrupts mitochondrial function in neurons, reducing their capacity to convert glucose into ATP (energy). This metabolic crisis is well-documented in concussion research and explains why the brain "runs out of energy" during cognitive or physical exertion. Symptoms worsen with activity because the brain cannot meet the energy demand (Giza & Hovda, 2014). Ketones bypass the damaged glucose pathway. When carbohydrate intake drops below approximately 50 grams per day, the liver produces ketone bodies (beta-hydroxybutyrate, acetoacetate) from fatty acids. Neurons take up ketones through a different transport system than glucose and metabolize them through a parallel energy pathway. This pathway produces ATP with less oxidative stress and fewer free radicals than impaired glucose metabolism. Ketones have direct neuroprotective effects. Beta-hydroxybutyrate (BHB) inhibits the NLRP3 inflammasome, a key driver of neuroinflammation. BHB also increases brain-derived neurotrophic factor (BDNF), which supports neural repair and plasticity. These effects are independent of the energy supply benefit. Ketones are both fuel and medicine for the injured brain. The research is early but promising. Animal models of TBI show improved outcomes with ketogenic diets. Human trials are limited but case reports and small studies show symptom improvement in post-concussion patients who adopt low carb approaches. This is not established clinical practice yet, but the mechanistic rationale is strong. Practical Dietary Approach for Concussion You do not need full ketosis to benefit. Strict ketogenic diets (under 20g carbs/day) are difficult to maintain and carry risks during recovery. A moderate low carb approach (50-100g carbs/day) reduces inflammation and stabilizes blood sugar without the restrictive burden. Focus on food quality rather than hitting a specific carb number. Prioritize these foods: Fatty fish (salmon, sardines, mackerel): Omega-3 fatty acids (EPA and DHA) cross the blood-brain barrier and directly reduce neuroinflammation. DHA is a structural component of neural membranes. Aim for 2-3 servings per week minimum. Eggs: Choline supports acetylcholine production, which concussion depletes. The fat content provides steady energy without blood sugar impact. Avocados and olive oil: Monounsaturated fats provide brain fuel and contain anti-inflammatory compounds (oleocanthal in olive oil has ibuprofen-like effects). Leafy greens: Magnesium supports neural function and sleep. Folate supports methylation pathways involved in neurotransmitter production. Berries: Anthocyanins cross the blood-brain barrier and reduce oxidative stress. Low glycemic impact compared to other fruits. Nuts and seeds: Vitamin E, selenium, and healthy fats support antioxidant defense and neural membrane repair. Reduce or eliminate: Refined sugar and processed carbs: White bread, pasta, pastries, candy, soda. These spike blood sugar, increase inflammation, and provide zero recovery benefit. Seed oils (soybean, corn, canola): High omega-6 content promotes inflammatory pathways. Cook with olive oil, butter, or coconut oil instead. Alcohol: Directly neurotoxic and pro-inflammatory. Avoid completely during recovery. Ultra-processed foods: Additives, preservatives, and artificial ingredients increase systemic inflammation. The Risk of Underfueling Your brain needs fuel to heal. This is the critical caveat with low carb diets during concussion recovery. Aggressive caloric restriction or extreme carbohydrate elimination can backfire. The brain consumes 20% of your total energy at rest and more during the metabolic recovery process. Undereating slows healing. Do not combine low carb with calorie restriction. If you are eating low carb, increase fat intake to maintain total calories. Your body needs adequate energy. The goal is changing the fuel source (less glucose, more fat/ketones), not reducing total fuel. Concussion patients who restrict both carbs and calories often experience worsening fatigue, brain fog, and mood disturbance. If you feel worse on low carb, adjust. Some people respond poorly to rapid carbohydrate reduction, especially if their nervous system is already dysregulated from concussion. Headache, irritability, and fatigue during the transition ("keto flu") are hard to distinguish from concussion symptom worsening. Transition gradually over 1-2 weeks rather than making a dramatic overnight change. Movement Supports Metabolic Recovery Gentle mobility work supports the metabolic recovery that dietary changes target. Movement increases cerebral blood flow, supports BDNF production, and regulates the autonomic nervous system that controls digestive function. JME 1 Slow cervical rotation increases blood flow through the vertebral arteries, supporting cerebral perfusion. The metabolic benefits of dietary change require adequate blood flow to deliver nutrients and ketones to the injured brain. Cervical mobility ensures this delivery system is functioning. JME 14 Chin tucks activate deep cervical flexors that support head position during eating. Many concussion patients eat with their head forward and down (looking at the plate), which compresses cervical structures and worsens nausea. Proper cervical alignment during meals reduces digestive discomfort. JME 3 Lateral cervical flexion releases upper trapezius tension that contributes to the nausea and appetite suppression many concussion patients experience. The vagus nerve runs through the cervical region, and muscular compression affects its digestive regulation function. JME 153 Thoracic extension opens the chest and diaphragm. The diaphragm descends during deep breathing, creating mechanical stimulation of the vagus nerve branches that innervate the stomach and intestines. This stimulation promotes the "rest and digest" state needed for proper nutrient absorption. Start your 14-day free trial for recovery routines that support your brain's healing process. Pre-Meal and Post-Meal Mobility JME 150 Thoracic rotation before meals mobilizes the ribcage and diaphragm, preparing the digestive system for food intake. Gentle rotation also provides parasympathetic stimulation that shifts the nervous system toward the "rest and digest" state. JME 5 Cervical extension opens the anterior cervical structures where the vagus nerve is most accessible. A brief session of gentle extensions paired with extended exhale breathing before meals primes the vagal pathway for digestive function. JME 42 Shoulder mobility releases the protective posture that restricts breathing during meals. Dropping elevated shoulders while eating allows deeper breathing, which maintains parasympathetic tone throughout the meal. JME 6 Cervical flexion after meals gently stretches the posterior cervical muscles. A brief post-meal mobility session keeps the nervous system in parasympathetic mode, supporting the digestive process rather than shifting back to sympathetic activation. Support your recovery nutrition with simplmobility's digestive support routines. Supplements That Support Concussion Recovery Omega-3 fatty acids (EPA/DHA): 2-4 grams daily of combined EPA/DHA. The most evidence-supported supplement for concussion recovery. DHA is a structural component of neural membranes and EPA reduces neuroinflammation. If you are not eating fatty fish regularly, supplementation is recommended. Magnesium: 300-400mg daily (glycinate or threonate forms). Concussion depletes brain magnesium, which is required for over 300 enzymatic processes including energy production and neural signaling. Magnesium threonate specifically crosses the blood-brain barrier. Creatine: 5g daily. Creatine provides a rapid energy buffer for neurons, supporting ATP production during the metabolic crisis of concussion. Studies show improved cognitive performance in TBI patients supplementing creatine. Vitamin D: 2000-4000 IU daily if deficient. Vitamin D modulates neuroinflammation and supports BDNF production. Deficiency is common and worsens recovery outcomes. Test your levels and supplement accordingly. Should I try a strict keto diet after concussion? A moderate low carb approach (50-100g carbs/day) provides most of the anti-inflammatory benefits with fewer risks than strict keto. Strict keto (under 20g carbs) is difficult to maintain, can cause significant adaptation symptoms that overlap with concussion symptoms, and risks inadequate caloric intake. If you want to try strict keto, work with a dietitian and transition gradually. Do not combine with caloric restriction. How soon after concussion should I change my diet? You can start reducing processed carbs and increasing anti-inflammatory foods immediately. In the first 48 hours when appetite is often poor, focus on eating anything you tolerate. As appetite returns, shift toward the anti-inflammatory pattern. Do not stress about perfect nutrition during the acute phase. Eating enough calories matters more than macronutrient ratios in the first few days. Will low carb help with post-concussion brain fog specifically? Brain fog is one of the symptoms most responsive to dietary change. Blood sugar instability directly worsens cognitive function. Eliminating the glucose spikes and crashes that come from high carb meals often produces noticeable improvement in mental clarity within 1-2 weeks. The ketone availability provides alternative fuel that bypasses the impaired glucose metabolism driving the fog. References Prins, M. L., et al. (2014). The pathophysiology of traumatic brain injury at a glance. Disease Models & Mechanisms, 7(8), 923-931. PubMed Giza, C. C., & Hovda, D. A. (2014). The new neurometabolic cascade of concussion. Neurosurgery, 75(Suppl 4), S24-S33. PubMed