Vitamin D
Important for bones, muscles and the immune system. A deficiency is common in our latitudes — especially in winter — and can show up as fatigue, among other things.
Supplements, backed by your labs
Supplements —
but the right ones.
Supplements only make sense when they fit you. At your avi practice, we use lab tests to find out whether you have a deficiency. Your doctor then discusses with you which nutrients may be relevant for you. Whether and where you buy them is entirely your choice.
Doctor-guidedBased on your lab results
How it works
From lab test to the right nutrient
From lab test to the right nutrient — based on your personal results and a conversation with your doctor.
1
Medical test
Get tested in your practice or with an avi hometest to identify any deficiencies.
2
Results show deficiencies?
Your results reveal which vitamins or minerals your body needs more of.
3
Doctor's advice
Talk to your GP about which nutrients are useful for your individual needs.
4
You decide
Whether and where you buy suitable products is your decision — guided by your results.
Good to know
Common nutrient deficiencies
The levels we test most often — and what a deficiency can mean.
Iron / ferritin
Central to oxygen transport in the blood. Low levels can come with exhaustion, difficulty concentrating or paleness.
Vitamin B12
Significant for nerves and blood formation. A deficiency more often affects people on a plant-based diet.
Folate
Involved in cell division and blood formation. The need is higher during pregnancy, among other situations.
Magnesium
Involved in muscle and nerve function. A deficiency can show up, for example, as muscle cramps.
Omega-3
Fatty acids that contribute to heart and brain function. Supply depends strongly on diet.
Our approach
Why diagnostics come before supplements
Not just any supplement — clarity about your levels and individual medical advice.
Diagnostics, not guesswork
We measure your levels instead of supplementing blindly.
Individual medical advice
Your doctor discusses which nutrients may be relevant for you.
Follow-up
If needed, we re-check your levels and adapt the advice.
Your choice of source
Whether and where you buy is up to you.
If you'd like to order
You are completely free to choose where you buy. If you decide on Sunday Natural, as an avi patient you get 10 % off your first order with the code AVI10.
Go to Sunday NaturalCommon questions
Everything you need to know
Answers about diagnostics, medical advice and supplements.
avi patient perk
10 % at Sunday Natural with code AVI10