Our dieticians

Our dieticians are enthusiastic and passionate, up to date with the latest research and trends, have a holistic view and believe in making a tailor-made nutrition plan.

Quirine Beijers
Hazenstraat 53 – bbb Amsterdam Jordaan
T:0640792449

Quirine is a certified dietitian, lifestyle coach, and orthomolecular therapist, specializing in uncovering the root causes of health complaints. She discovered early on that real, lasting improvement doesn’t come from strict rules, forbidden-food lists, or temporary diets — but from insight, calm, and sustainable changes that fit your life.

She looks beyond symptoms and works with you to explore where issues truly originate: in the gut, hormones, stress, sleep, recovery, or daily habits. From this full picture, she creates a personal plan that feels logical, realistic, and focused on long-term results. No yo-yoing, no pressure — just learning what does work and what your body genuinely needs.

Quirine is known for her clear explanations, thorough analysis, and her blend of conventional dietetics with orthomolecular insights. When needed, she collaborates with GPs and other specialists.

Working with measurements & testing
To provide targeted and evidence-based guidance, Quirine works with body composition analyses (muscle mass, fat mass, hydration, metabolic age), laboratory testing (microbiome, gut health, hormones, nutrient deficiencies), and glucose monitoring to understand blood-sugar regulation.

Her key areas of expertise include:
Gut health (IBS, SIBO, bloating, constipation/diarrhoea), blood-sugar regulation, hormonal imbalance (PMS, cycle issues, fatigue), skin issues, stress-related complaints and low energy, weight support without restriction, lab testing, and behavioural change.

Insurance & reimbursement
Quirine is a registered dietitian and an MBOG-affiliated orthomolecular therapist. Consultations may be reimbursed from basic health insurance (3 hours per calendar year) and are often (partially) reimbursed through supplementary insurance via her MBOG registration.

Get to know each other
Not sure if her approach is right for you? You can always book a free, no-obligation introductory session — online or at her practice on Hazenstraat in Amsterdam.

Jennifer Graven
Kristalweg 27 Delft
T: 06 139 744 17 
E: info@jennifergraven.nl

Jennifer graduated as a dietitian in 2015, has gained experience in various health centers and has had her own practice at bbb dietetics Delft for a few years now. In depth she has followed the training to become an orthomolecular therapist. ‘I see nutrition as a very important foundation in your life. With a good basis in your diet you have more energy & you feel physically and mentally stronger and fitter.’

Her main specializations are

• Overweight and obesity
• Diabetes Mellitus
• Underweight
• Hypertension and hypercholesterolemia
• COPD
• Intestinal complaints (IBS, food intolerances)
• Hormonal imbalance
• Vegetarians and vegans
• Nutrition during and around pregnancy
• Orthomolecular nutrition
• EMB tests

In her consultations she tries to listen to your wishes as closely as possible and goals, and to ensure that you are provided with sufficient tools to continue with your diet and beyond in a healthy way in the future. She uses a holistic approach that takes stress regulation into account, which ensures complete lifestyle advice that supports your health. ‘I continue to be amazed at the influence that changing the diet has on people’s health. Applying small – but lasting – dietary changes step by step ensures that you can develop a healthy foundation in the long term. You will benefit from this for the rest of your life.’