The study investigates the effect of dietary supplementation of nicotinamide ribonucleoside (NR) in children with ataxia telangiectasia (AT), with main focus on neurological symptoms.

Ataxia Telangiectasia (AT) is a genetic disease, where patients are born with mutations in the Ataxia- Telangiectasia Mutated (ATM) gene. The gene codes for the ATM kinase, which is required for repair of DNA double-stranded breaks and DNA damage response signalling.

There is no treatment available for the neurological manifestations of AT.

The study investigates the effects of NR (300 mg/day) during 2 years.