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Children and teenagers have distinct nutritional needs, and specific conditions have genuine nutritional dimensions that clinical intervention can meaningfully address. Jake builds evidence-based youth nutrition plans that give young people the nutritional foundation they need to thrive.
5yrs
Clinical experience
5.0 Rating
From 140+ verified reviews
Jake works with children and adolescents across a full spectrum of nutrition needs, from foundational healthy development to specific clinical conditions with significant nutritional dimensions.
ADHD Nutritionist
Attention, focus, and emotional regulation all have direct nutritional drivers: iron, zinc, omega-3s, and magnesium directly affect dopamine and noradrenaline. Jake builds ADHD-specific nutrition plans for children that address the biochemistry, not just the behaviour.
Teenager Nutritionist
Puberty doubles the demand for protein, iron, zinc, magnesium and vitamin D, and most teenagers fall short. The result is fatigue, poor focus, mood swings and stalled physical development. Jake builds teenager nutrition plans that fuel growth, stable energy and strong daily performance through every stage of adolescence.
Children Nutritionist
Fussy eating, low energy, slow growth or recurring tummy issues are rarely about willpower. They’re about what’s getting in, what’s being absorbed, and what’s missing. Jake builds children’s nutrition plans that steady eating patterns, support growth and build a healthy relationship with food from the ground up.
The nutritional demands of growth, cognitive development, and hormonal maturation create requirements that are distinct, and in some cases dramatically higher, than adult needs. Iron, omega-3 DHA, zinc, calcium, vitamin D, and iodine are all critical at specific developmental stages in ways that don’t apply to adults. Clinical nutrition for young people requires age-specific, development-aware expertise.
Jake’s approach to youth nutrition is practical by design, built around the real challenges of feeding children and teenagers, working with families on achievable dietary changes rather than unrealistic ideals.
31.6%
of Australian adolescents engage in disordered eating behaviors yearly
With eating disorder cases in young people aged 10–19 rising by 86% since 2012
1in5
Young people and adolescents have an eating disorder.
This means eating disorders are one of the most common and urgent mental‑health conditions affecting young people.
78.4%
Of children with ADHD have been found to be deficient in Vitamin D
Vitamin D is essential for children because it supports bone growth, immune strength, and healthy muscle function.
Poor school performance
Difficulty focusing, learning, or retaining information, particularly when combined with sleep issues or dietary patterns
Fatigue & low energy
Persistent tiredness that affects school, sport, or mood… one of the most common presentations of iron deficiency in youth
Digestive complaints
Constipation, bloating, recurrent stomach pain, or food aversions, common in children with gut health issues or food intolerances
Mood changes & irritability
Emotional dysregulation, low mood, or anxiety in young people, all with well-documented nutritional dimensions
Slow growth or underweight
Growth concerns identified by a paediatrician, or persistent difficulty maintaining healthy weight in the context of adequate food availability
Poor immune function
Frequent illness, slow recovery, or recurring infections, often linked to zinc, vitamin D, or gut health deficiency
ADHD diagnosis
A formal or suspected ADHD diagnosis, the nutritional dimensions are well-evidenced and consistently undertreated
Picky eating
Limited food variety creating measurable nutritional gaps in vitamins, minerals, or food groups critical for development
Experiencing more than two of these? Book a consult →
Jake’s youth nutrition approach is practical, age-appropriate, and family-centred. Recommendations are built around the real constraints of feeding children and teenagers, not theoretical ideals.
01
Comprehensive developmental assessment
A thorough review of your child’s growth, dietary patterns, health history, bloodwork where available, and specific concerns, building a complete nutritional picture for their age and stage.
02
Age-specific nutritional protocol
A tailored plan covering the critical nutrients for your child’s specific developmental stage, with practical, family-friendly strategies that don’t require separate meal preparation.
03
Condition-specific intervention
For ADHD, anxiety, gut health issues, or other specific conditions, Jake builds targeted nutritional protocols with genuine evidence, explained clearly for both parents and young people.
04
Family education & support
Jake works with the whole family, parents receive the clinical rationale, teenagers receive age-appropriate explanations, and younger children benefit from strategies within normal family eating patterns.
05
Ongoing monitoring
Children and teenagers change rapidly. Jake monitors progress and adjusts plans as your child grows, their needs shift, and the clinical picture evolves.
Jake Biggs
EXCELLENT Based on 140 reviews Posted on Google G HTrustindex verifies that the original source of the review is Google. I needed help. My weight had plateaued and I was stuck and desperate. My specialist told me I had to find a nutritionist to get me back on track. My daughter did some research and found Jake of Nutrition Longevity. She told me he had the best reviews she’d’ found. The rest is history. Jake helped me to focus on what needed to be done if I was to successfully reach my goal weight. I did what he told me and as long as I did that I had a consistent weekly weight loss. I didn’t count a calorie! I had such a sense of freedom. In 8 weeks I’d lost more than 4kgs. The process continues and I am loving it. Because of what he has taught me I believe I will get to my goal weight and this time NOT regain the weight I lose! Jake is very knowledgeable about nutrition and patient when explaining concepts around it. He has been very encouraging along the way. I’m most grateful. Thanks again Jake!Posted on Google Makayla CraggTrustindex verifies that the original source of the review is Google. Jake has a wealth of knowledge that has really helped me understand sport nutrition. I have been looking at different supplementation for elite sport and Jake has provided great guidance on the benefits and risks of the supplements. He has explained in great detail using his sport nutrition expertise and significantly helped me with understanding how I can benefit myself through sport and be careful surrounding different nutrition strategies. I would definitely recommend him as he is calm, friendly and is extremely helpful through his knowledge.Posted on Google Natalia HenríquezTrustindex verifies that the original source of the review is Google. I decided to work with a dietitian after having my baby, as I was struggling to lose weight through the gym. I chose Jake because he individualized his assessments based on size, which I appreciated—I didn’t want to focus on the number on the scale. The weekly check-ins helped me stay aware of my habits, and Jake’s human approach connected my emotions and experiences with my food choices. What I liked most was that I never felt like I was on a strict diet; it was more holistic and personal. Although I did have to cut out some foods initially, I never felt deprived. In fact, I had more energy because I was eating better nutrients. As a working mom with a small baby and dogs, the plan was tailored to what I had available, making it easy to follow. Jake encouraged me to choose my own foods and offered alternatives, which empowered me to make my own decisions about what to eat. Overall, this plan significantly boosted my self-esteem, and I was able to return to my pre-pregnancy weight in just four months—without any stretch marks and feeling revitalized. I am truly grateful for the support I received and found it easy to communicate with Jake. His approach was very personable, and I consider working with him to be one of my best investments post-pregnancy. I highly recommend him.Posted on Google Ben KramerTrustindex verifies that the original source of the review is Google. Jake was an incredible person to work with, who genuinely cares about all his clients and goes above and beyond to make sure they hit their personal goals.Posted on Google Lisa HTrustindex verifies that the original source of the review is Google. Thanks so much, Jake! This was my first time ever seeing a nutritionist, and you made the whole experience feel easy and approachable from the start. I really appreciated how well you understood me and helped tailor my eating to suit my busy lifestyle and personality. I’m so happy with where I’m at now, and you’ve made everything feel sustainable long term. Thank you also for all the support outside of sessions — answering questions and helping me find specific products at the supermarket made such a difference. I feel like I’m at a healthy weight again and finally feel great in my clothes again. I couldn’t recommend Jake more!Posted on Google John blicqTrustindex verifies that the original source of the review is Google. I worked with Jake on a structured nutrition plan with a clear target in mind. In 2 months, I dropped 7 kg—not through restriction or gimmicks, but through a plan we built together and that he held me accountable to consistently. What stands out is Jake's approach: he doesn't just hand you a meal plan and disappear. He maintains the discipline of the framework while staying responsive to what actually works for your life. That combination of structure and flexibility is rare. If you're serious about nutrition outcomes and need someone who will keep you honest while you do the work, Jake delivers.Posted on Google Mimo SsTrustindex verifies that the original source of the review is Google. I can’t thank Jake enough for all the help and support he’s given me on my weight loss journey. From the very first session, he made me feel completely comfortable and understood. He’s not just knowledgeable he’s genuinely caring, supportive, and always brings such a positive, bubbly energy to every conversation. Thanks to his guidance and encouragement, I’ve managed to lose 9.5kg in just 8 weeks! Highly recommend!!!Posted on Google Sid GirishTrustindex verifies that the original source of the review is Google. Jake is a master of his craft and specifically uses science-based knowledge for your particular nutrition goals. Over the past three months we’ve worked together on sustainable lean mass muscle growth. I’ve experienced steady, consistent, and incremental lean muscle mass gain without gaining unneccessary fat at the same time (the "dirty bulk" approach I had been using in the past) — This is exactly what I was looking for in a sustainable lean muscle mass growth journey. I've looked forward to our fortnightly one-on-one meetings where Jake’s thoughtful and insightful advice has always been carefully tailored to my individual needs. I have seen so much growth as I have put on 3kgs of pure muscle mass in the space of the last 3 months after we came up with an effective training and nutrition plan. Jake is a brilliant communicator and the continuous support he provides even outside of scheduled sessions has helped me tremendously. He’s been instrumental not just in helping me gain weight, but in guiding me to build a sustainable muscle growth plan that fits into my lifestyle long-term, including broader mental and physical strategies that go beyond just nutrition. If you're a male in Sydney looking for an expert in sustainable muscle growth who truly understands how to help you reach and maintain your target weight and cut through all the "industry" noise, then Jake is the one! I could not recommend his services more highly.Posted on Google Lily HTrustindex verifies that the original source of the review is Google. Jake is phenomenal. I had literally tried everything to lose weight and came to him highly skeptical it was even possible. Over 5 months I lost 9 kilos - no calorie counting, just steady, sustainable weight loss. Jake tailored a program for my specific needs that worked! His boundless enthusiasm and passion for what he does made it easy to stick to the program. He was always available for out of session support. I can not recommend Jake highly enough as an expert sustainable weight loss nutritionist- particularly to women who are struggling to make it happen themselves. My only regret is not finding Jake sooner!Posted on Google Matthew PowellTrustindex verifies that the original source of the review is Google. Jake offers a real science-based skillset for sustainable weight loss. I engaged his services to trim down a bit after not making much progress with customary calorie-counting. The goal was to lose weight ambitiously over a 2 month period. Jake’s method proved to be a bit too successful, having basically reached my goal weight in 3/4 of the time! Would recommend Jake to anyone who’s done with fad diets.
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Jake works with children, pre teens and teenagers, tailoring his approach to the developmental, emotional
and nutritional needs of each age group.
He supports young people with eating disorders, ADHD, anxiety related eating patterns, gut issues, growth and energy concerns, and general nutrition challenges.
His work always includes parent involvement and coordination with existing healthcare providers so progress feels safe, structured and consistent for your child or teenager.
Yes. Jake works collaboratively with paediatricians and child psychologists.
Each clinician supports a different part of your child’s health, and Jake’s nutrition work is designed to fit seamlessly alongside medical and psychological care.
Paediatricians oversee diagnosis, investigations and medical monitoring, while child psychologists support emotional, behavioural and developmental needs.
Jake focuses on the nutritional, metabolic and daily patterns that influence mood, energy, growth, eating behaviours and
overall stability.
When these areas are aligned, children and teenagers progress more smoothly and feel more supported across all parts of their care.
Yes. Nutrition plays a major role in both eating disorders and ADHD because it directly influences the brain, the nervous system, appetite regulation, mood stability and daily behavioural patterns.
In eating disorders, targeted nutrition helps stabilise energy, reduce extremes in hunger and fullness, support the gut, rebuild metabolic function and calm the physiological stress response that keeps symptoms active.
In ADHD, nutrition supports neurotransmitter pathways, blood sugar stability, focus, emotional regulation
and predictable eating patterns.
Jake is flexible. Some families prefer that their child or teenager attends the consultation because it allows Jake to understand their patterns, routines, energy, mood, appetite and day to day challenges directly.
For younger children, the session can be a mix of parent discussion and child involvement so the process feels safe and age appropriate. For teenagers, being part of the consultation often helps them feel included, respected and supported in their own health journey.
Parent involvement is always included, and Jake guides you on the best structure for your child’s age, needs and comfort level.
No. Your child or teenager will not be asked to change everything they eat. Jake’s approach is flexible, realistic and designed to meet young people where they are. The focus is on understanding their current patterns, identifying what is driving their symptoms or challenges, and making targeted adjustments that
feel achievable rather than overwhelming.
Most children and teenagers actually gain more clarity, confidence and predictability around food without needing a complete overhaul.
Changes are introduced gradually, with parent involvement and a clear plan that supports growth, energy, mood and daily functioning while keeping their diet as broad and enjoyable as possible.
Clinical nutrition is one of the most overlooked pillars in supporting the health of children and teenagers. Jake’s world‑class expertise in paediatric nutrition allows your child or teenager to rebuild optimal nutritional status, strengthen long‑term health, and establish the foundations for lifelong wellbeing.
Nutrition education and wellbeing programs for schools, empowering students, staff, and families with lifelong healthy habits.
Performance nutrition for athletes and active teams, optimise training load, recovery, and body composition.
Individual clinical nutrition programs for employees dealing with gut health, diabetes, or other health conditions.