Mental Health and Nutrition

The main Rucklidge recommendations

1. Start with whole, minimally processed food. This is probably her most important practical recommendation. She explicitly says, “Food is where I go first,” and recommends a diet low in processed foods and high in vegetables, fruits, nuts, seeds, fish and other healthy fats. The Better Brain similarly emphasizes fresh fruits and vegetables, nuts and seeds, legumes/pulses, fish and olive oil.
2. Reduce ultra-processed foods rather than obsessing over individual “superfoods.” Her argument is fundamentally about nutrient density. Ultra-processed diets tend to displace foods supplying the vitamins, minerals and other nutrients needed for brain metabolism. In her educational presentations she contrasts ultra-processed foods with foods such as leafy greens, lentils, salmon, eggs, nuts, fruits and vegetables.
3. Think “broad spectrum,” not “Which one vitamin fixes depression/ADHD/anxiety?” This is a particularly important distinction from some of the infographics we've just been making. Rucklidge's research increasingly emphasizes that nutrients operate together. She argues that no single nutrient is the magic ingredient; vitamins and minerals serve interconnected metabolic processes, so supplying a broad range may make more biological sense than giving one isolated nutrient.
4. A therapeutic micronutrient formula is not the same thing as an ordinary once-a-day multivitamin. The formulas studied in her trials contain many vitamins and minerals and generally provide a much broader and higher-dose intervention than a standard grocery-store multivitamin. In a clinical interview she specifically distinguished these research formulations from ordinary multivitamins on both the breadth of ingredients and dosage.
5. Micronutrients appear especially interesting for emotional dysregulation. Rather than describing them as a highly specific “ADHD supplement,” Rucklidge has emphasized improvements across domains such as irritability, emotional reactivity, anxiety, attention and general functioning. Her interpretation is that adequate micronutrition may support overall brain functioning and self-regulation rather than targeting one DSM diagnosis.
6. Different people may require different amounts of nutrients. A normal blood level doesn't necessarily establish that a person's cellular/metabolic requirements are optimally met. Her 2025 review discusses individual biological requirements, medication use, diet quality and gut-brain factors as reasons some people might require more nutrients than diet supplies. Importantly, she presents this as an area still needing research—not as proof that everyone needs high-dose supplements.
7. Don't abandon conventional treatment or casually change psychiatric medication. Her work investigates micronutrients as a legitimate treatment avenue, but that isn't equivalent to telling people to discontinue medication or psychotherapy. In fact, her current research is examining whether micronutrients and psychological interventions might work synergistically.