Why can't I concentrate lately?

B-vitamin imbalances affect neurotransmitter production and nerve signaling, impacting focus and mental clarity.


Checks B12 and Folate levels.
Only available in combination with an advanced blood test
Reviewed by Dutch doctors
Personal action plan
Interactive report
Real questions from people like you, and how a B-vitamins blood test helps answer them.
Why can't I concentrate lately?

B-vitamin imbalances affect neurotransmitter production and nerve signaling, impacting focus and mental clarity.
Could mood swings be linked to my nutrition?

B12 and folate support synthesis of serotonin and dopamine. Measuring them reveals low levels.
Why does my skin look dull?

Folate supports cell renewal and tissue repair. Low levels slow regeneration and affect skin vitality.
Why am I always tired?

Low B12 vitamins could contribute. The test screens for these so you can take action.
How it works

Our team will review additional details so you're fully prepared — no referral needed.

The clinic team welcomes you and takes a small blood sample. Expect your visit to take about 15 minutes from start to finish.

Your blood is analyzed, and within a few days you receive a digital report and personalized health plan from our physicians.
Each blood test includes a clear report reviewed by a doctor.

Duration: 15 min
Advanced blood test that goes further than a standard blood test. Includes a comprehensive 70+ biomarker blood test.
Reviewed by Dutch doctors
Personal action plan
Add more tests anytime
Blood add-ons for areas you’d like to look at more closely, as a complement to your blood test.
Medical data can be complex. Our interactive reports explain each result in simple terms with clear visuals.


Your blood values are mostly in range; vitamin D is low.
Significance:No findingObservationMinorFollow-up recommended
The B-vitamins test can be combined with other Ahead tests during the same visit to maximize health insights.
~ Shown values are illustrative samples.

Every health journey is unique. Read how others took control of their health with Ahead.