Clarissa Lenherr is a London based, registered Nutritional Therapist who focuses on personalised, predictive, preventative and participatory nutrition so that you can reach the optimum YOU.

Clarissa incorporates the most up-to-date scientific research using the functional medicine model, helping clients overcome a myriad of health problems to achieve long-term wellbeing.

Specialising in Digestive Health, Weight Management, Auto-Immune conditions, Thyroid health, Stress and General Health and Energy Balance, she practices from 39 Harley Street, London W1G 8QH

Let’s Get Started…



Our world has become a minefield of conflicting, contradictory and often confusing evidence about what to and what not to consume, how to and how much to exercise, what diet to follow and the ‘it’ fad diet promise of that week. 

When people think about the food they eat, they often see it as simply supplying their body with energy or for a pleasure platform. Yet, food really is so much more than this; it gives our body the tools it needs to thrive in the way it is designed. When we break it down into its constituents, food interacts with our body on a biochemical level. Nutrients delivered from the food we consume allow our organs and body systems to communicate and work synergistically. On the other hand, they can also hinder the fundamental processes in our body, leading to imbalances and disease.

Nutritional therapy focuses on using food, botanical supplements and lifestyle habits to help support your innate healing abilities and for each person, their journey will be completely unique.

Clarissa can assist with:

  • Thyroid issues: such as hyperthyroidism, hypothyroidism, Graves Disease and Hashimotos Thyroiditis
  • Hormone balancing: helping conditions such as PCOS, Menstruation and PMS
  • Cardiovascular Support: cholesterol issues, high blood pressure
  • Digestive Issues: such as IBD, IBS, Coeliac and allergies/intolerances
  • Auto-immune conditions: including Rheumatoid Arthritis, Multiple Sclerosis, Hashimotos, Graves Disease
  • Skin: Eczema, Urticaria and Acne
  • Immune System Support
  • Energy Revitalisation
  • Migraines
  • Stress Management and Chronic Fatigue
  • Histamine Intolerance
  • Anaemia
  • Weight Gain and Weight loss
For more information or to book your consultation, get in touch with me here


I practice at at 39 Harley Street, London W1G 8QH, and I am also available to conduct consultations in the workplace, at home or at a partner clinic close to you.

Initial Consultation 

Nutritional Therapy is not as simple as being told what to eat and when; what foods are good for you and what to do if you want to lose weight or ‘get healthy’. The objective is to identify what imbalance is causing or contributing to a specific health condition and manage it in a sustainable way.

Your journey will start with a 1 to 1.5 hour initial consultation where we will get to know each other, understand what you are trying to achieve and delve deep into your health history.

Prior to your consultation, you will be required to complete a health questionnaire and a 3-day food diary to ensure our time together can be utilised effectively.

Following all initial consultations, you will receive explanations of dietary and lifestyle factors that may be contributing to any symptoms along with a personalised nutrition and lifestyle programme designed to meet your requirements.

Follow Up Consultation 

Follow up consultations typically last 45 minutes, and can be done over skype or in person.

I recommend that you book your follow up consultation 4 weeks after your initial consultation. This will give us time to review your progress and make any necessary amendments as well as adjust for any new concerns that you may wish to discuss.



In some cases, I may also refer you for further testing if I feel it would allow us to gain further information about the health issue we are targeting. These can be administered in the comfort of your own home or in partner UK wide clinics by a qualified nurse.

Specific tests include:

  • Comprehensive Blood Count
  • Allergies & Intolerances
  • Well Man/ Well Woman Test
  • Travel & Immunology
  • Liver and Kidney Checks
  • B12 and Anaemia
  • Glucose Tolerance, Insulin Resistance and Diabetes
  • Comprehensive Digestive Stool Analysis Test
  • Bacterial Overgrowth of the Small Intestine Breath
  • Parasitology testing
  • Thyroid profile
  • Adrenal profile
  • Sex hormone balance
  • Toxic element levels
  • Candida Albicans



Registered Nutritional Therapist – BA HONS, DIP-NT, mBANT, mCNHC

Clarissa Lenherr is a registered nutritional therapist having graduated from The College of Naturopathic Medicine in Nutrition. She is also a member of BANT (The British Association of Nutritional Therapists) and the CNHC (Complementary and Natural Health Care Council). Continuous training and further learning courses enable Clarissa to gain increased expertise, ensuring she is abreast of new findings and developments in the captivating scientific field of nutrition.

Having spent half a decade working in the corporate world of property marketing, Clarissa swapped the daily grind for the clinic and turned a lifelong passion for healthy eating into a career.

Studying Nutritional Therapy part-time whilst working as a Marketing Manager, Clarissa is well practised at juggling her time and since leaving the marketing world splits her days between seeing clients, consulting for brands, hosting workplace workshops and writing on all things health and wellbeing.

Clarissa is passionate about educating people to discover and celebrate nutritious food, enabling clients to utilise and benefit from food and lifestyle choices in order to reach their optimum state of wellbeing. Clarissa practices personalised nutrition, advocating the “no one size fits all” approach. With this in mind, she works closely with clients to implement personalised nutritional strategies which fit into each client’s unique lifestyles and goals.

Clarissa is also a part-time contributor to several publications and offers commentary to some of the UK’s leading publications such as Red Magazine, The Daily Mail, Metro and The Telegraph offering nutrition and fitness advice.

Clarissa is also proud to work with great health brands as an ambassador, nutrition consultant and in-house nutritionist, including  Bioniq personalised health care supplements, Vita CocoVejo and Silver Linings Retreats.

She loves to spend her time travelling, experimenting in the kitchen, trying out new fitness classes, exploring international cuisines and investigating the aisles of grocery stores.

  • I initially came to Clarissa to lose weight, but she ended up teaching me a whole new way of eating, and although I quickly dropped the weight with her plan, the end result of feeling and wanting to be healthy has been the best gain of them all.

    Samantha R.

  • I was diagnosed with a very rare allergy and Newtriciously You was able to teach me and help me change my whole life! I was scared at first, but having someone by your side the entire time made my recovery and transition effortless.  

    Scarlett R.
  • My GP told me I needed to watch my cholesterol and weight. Clarissa was able to take my work and socialising into account and devise a plan that fits perfectly for me. I lost weight without even having to stop going out to my favourite spots for lunch and dinner!

    Andrew D.

Get in touch with Clarissa!

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