By Lisa Marley, Personal Trainer, Nutrition Coach and Trained Chef

This is the question we get asked all the time at WPTC with so many training options around, it’s often hard to know if one should specialize in nutrition via an additional qualification. To explore this, we caught up with Lisa Marley, a nutrition coach and TV chef to get her expert opinion. Over to you Lisa!

Disclaimer: this article is intended for information only and does not constitute advice. The views are of the author only and are not necessarily those of WPTC.

If you've been working as a personal trainer for any length of time, you'll know that training is only half the battle. Your clients show up, smash their sessions, and leave feeling pumped—then go home and undo it all with their food choices.

You can write the most brilliant training programme in the world, but if your client's nutrition is all over the place, they're not going to see the results they want. And when they don't see results? They lose motivation, stop training, and ultimately, you lose a client.

This is exactly why I trained as a nutrition coach alongside my personal training qualification, and honestly, it's been one of the best professional decisions I've ever made. The transformation I see in my clients when we address both training AND nutrition is remarkable—not just physically, but mentally and emotionally too.

As personal trainers, we're brilliant at getting people moving. We understand progressive overload, periodisation, biomechanics, and how to motivate someone through a tough session. But when a client asks, "What should I eat?" Many PTs freeze or fall back on generic advice that doesn't really address their specific needs.

Nutrition is complex, emotional, and deeply personal. It's tied up with:

• Decades of yo-yo dieting and restrictive eating
• Misinformation from social media and wellness influencers
• Hormonal changes, particularly for women over 40 navigating perimenopause
• Busy lifestyles, family demands, and budget constraints
• The sheer overwhelm of conflicting nutritional advice

Your clients don't need another "eat clean" Instagram post or a generic 1,200-calorie meal plan downloaded from the internet. They need someone who understands their individual circumstances, can guide them through the confusion, and help them build sustainable habits that actually fit their lives.

That's where nutrition coaching comes in. This is really important, so pay attention: as a nutrition coach, you cannot write individual meal plans unless you're a registered dietitian or clinical nutritionist. That's the regulation in the UK.

What Can Nutrition Coaches Offer?

• General Healthy Eating Guidance: You can educate clients about macronutrients, portion sizes, food groups, and general nutrition principles based on government guidelines and evidence-based research.
• Habit and Behaviour Change: This is where the magic happens. You can help clients identify unhelpful eating patterns, set realistic goals, and build sustainable habits that last beyond the 12-week programme.
• Food Education: Teaching clients how to read food labels, understand ingredients, recognise marketing tactics, and make informed choices in supermarkets and restaurants.
• Meal Preparation Support: You can suggest recipe ideas, batch cooking strategies, and practical tips for making healthy eating easier within their lifestyle and budget.
• Supplementation Guidance: Based on your training, you can discuss general supplement use (e.g. multiple vitamin or vitamin D supplements) provided this does not conflict with NHS guidance. It should be noted however that specific dosing and prescription should always involve a healthcare professional.
• Accountability and Support: Regular check-ins, tracking progress, celebrating wins, and troubleshooting challenges. This consistency is often the difference between success and giving up.
• Connecting Food to Wellbeing: Helping clients understand the relationship between what they eat and how they feel—energy levels, mood, sleep quality, digestion, and performance.

What Can’t a Nutritionist Coach Do?

• Write individualised meal plans (that's for dietitians and clinical nutritionists only)
• Diagnose nutritional deficiencies or medical conditions
• Prescribe specific diets for medical conditions without appropriate qualifications
• Make therapeutic nutrition interventions for diagnosed conditions

It sounds like a limitation, but honestly? Most clients don't need or even want a rigid meal plan. What they need is education, support, and someone to help them navigate their unique challenges. That's exactly what nutrition coaching provides.

Why Does a Nutritionist Coach Need to Choose a Recognised Qualification?

Here's where I need to be really clear: not all nutrition qualifications are created equal. The fitness industry is full of weekend courses and online certificates that sound impressive but aren't worth the paper they're printed on.

In the UK, if you want to offer nutrition coaching professionally and with credibility, you need a recognised qualification. This typically means:

• Level 3 Nutrition for Physical Activity (or similar)
  All CIMSPA Level 3 Personal Training courses include Level 3 Nutrition, covering general healthy eating guidance. This is your foundation and allows you to provide basic nutritional advice to clients.
• Level 4 Nutrition Qualification
  If you want to go deeper, a Level 4 qualification in nutrition (such as those awarded by RSPH - Royal Society for Public Health, or other recognised awarding bodies) allows you to provide more detailed, evidence-based advice.

Why Does a Recognised Nutrition Qualification matter?

• Professional credibility: Clients and employers take you seriously when your qualification comes from a respected awarding body.
• Insurance coverage: Many professional indemnity insurance policies require recognised qualifications to cover nutrition coaching.
• Legal protection: If something goes wrong or a client makes a complaint, having a proper qualification demonstrates you've met professional standards.
• Evidence-based education: Recognised courses teach current, scientifically-backed information rather than trendy pseudoscience.
• Career opportunities: Gyms, health clubs, and wellness centres often require staff to hold specific qualifications from approved bodies.
• Ongoing professional development: Recognised qualifications usually require CPD (Continuing Professional Development), keeping your knowledge current.

What Are the Red Flags to Avoid When Choosing a Nutrition Qulaification?

• Courses that promise you can "prescribe meal plans" (unless such a course is a degree!)
• Qualifications from unrecognised or overseas bodies may not be recognised in the UK
• Weekend courses that claim to make you a "certified nutritionist"
• Programmes that teach unsupported or pseudoscientific approaches
• Providers not affiliated with CIMSPA or recognised UK awarding bodies

Summary of Whether a Personal Trainer Should Train as a Nutrition Coach

Training as a nutrition coach—properly, through a recognised qualification—gives you the tools to support your clients holistically. You can address the habits, behaviours, and nutritional patterns that are holding them back, while staying within your professional scope.

You don't need to become a dietitian. You don't need to write meal plans. You just need to understand nutrition well enough to guide, educate, and support your clients in building sustainable, healthy eating habits.

So, if you're serious about your career as a personal trainer, invest in your nutrition education. Choose a recognised qualification. Learn properly. And watch how dramatically your impact on clients' lives expands.

Photo by Shannen Lythgoe

Lisa Marley is a Level 3 Personal Trainer, qualified Nutrition Coach, and Trained Chef who specialises in helping women over 40 build strength, optimise nutrition, and navigate midlife transitions with confidence. She is passionate about evidence-based practice and continuing professional development in both fitness and nutrition. www.shewould.co.uk

For training providers who may offer nutrition qualifications see our compare list at here.