Arsenic Causes Autism-Like Behaviors in Mice. NMN Reversed Them.
NonToxCo Research
Science & Safety Team · 4/7/2026
Mice exposed to arsenic during pregnancy and early life developed autism-like behaviors. But supplementing with NMN (nicotinamide mononucleotide) reversed the brain damage, gut disruption, and behavioral problems.
Arsenic Triggers Autism-Like Changes
A 2026 study in Ecotoxicol Environ Saf exposed mice to arsenic (1.2 mg/kg/day) during the perinatal period (pregnancy through early postnatal life). The offspring developed autism-like behavioral phenotypes.
Arsenic depleted NAD+ in brain tissue, reduced synaptic density in the cortex, disrupted gut bacteria, triggered intestinal inflammation, and activated brain immune cells (microglia and astrocytes). The damage spanned brain, gut, and immune system simultaneously.
NMN Reversed the Damage
When researchers gave arsenic-exposed mice NMN (500 mg/L in drinking water), NAD+ levels in the brain were restored. Synaptic density increased. Autism-like behaviors significantly improved. Gut bacteria normalized, with beneficial species like Lactobacillus and Akkermansia bouncing back. Brain inflammation calmed down.
NMN also boosted Clostridium species that produce vitamins, further supporting recovery through the gut-brain axis.
Where Arsenic Exposure Comes From
Arsenic is in rice, well water, apple juice, and contaminated soil. Millions of people worldwide are exposed at levels that could affect fetal brain development.
What You Can Do
Filter water for arsenic. Rinse and cook rice in excess water. Vary grain sources. Talk to your doctor about NAD+ supporting supplements during pregnancy. Browse non-toxic baby products for safer choices.
Also see glass food storage for safer alternatives.