Summary: Researchers report that a complex dietary supplement appears to have anti‑aging effects that can prevent and even reverse substantial brain cell loss in a mouse model.
Source: McMaster University.
Researchers at McMaster University report that a multi‑ingredient dietary supplement composed of thirty vitamins, minerals and natural nutraceuticals—many of them commonly found in health food stores—has demonstrated powerful anti‑aging effects in mice, preventing and in some cases reversing large‑scale brain cell loss.
The research team suggests this supplement may hold potential to slow the progression of devastating neurological conditions such as Alzheimer’s disease, amyotrophic lateral sclerosis (ALS) and Parkinson’s disease by targeting core cellular processes linked to neurodegeneration.
“The results are striking,” says Jennifer Lemon, a research associate in the Department of Biology and a lead author of the study. “Our goal is to explore whether this supplement can offset severe neurological impairments and ultimately improve quality of life.”
The formula includes familiar components such as vitamins B, C and D, folic acid, green tea extract and cod liver oil, along with other nutraceuticals. The mixture was initially developed by McMaster biologists around 2000 and has since been evaluated across multiple studies.
Earlier work published over the past 15 years showed benefits of the supplement in both normal mice and in a genetically engineered mouse model that ages rapidly. Those accelerated‑aging mice experience dramatic declines in cognition and motor skills within months, making them a valuable model for studying age‑related brain deterioration.
In the current experiments, the researchers studied mice that by one year of age had already lost more than half of their brain cells across multiple regions—a level of cell loss comparable to severe human Alzheimer’s disease. The animals received daily doses of the supplement, mixed into small pieces of bagel, over several months.
Over the treatment period the supplement halted the severe brain cell loss and eliminated observable cognitive decline in the treated animals. The mice also showed improvements in sensory and motor measures: vision and balance improved, and the sense of smell—often one of the earliest senses affected in human neurodegenerative disease—was notably enhanced.
“Because the fundamental cellular processes that drive neurodegeneration are conserved across species, findings in mice provide valuable clues for human disease,” explains Vadim Aksenov, a post‑doctoral fellow and co‑author of the study. “These results indicate a broad potential for addressing neuropathologies linked to oxidative stress, inflammation and mitochondrial dysfunction.”
Histological analysis revealed preservation of neuronal populations in midbrain regions including the cerebellum and olfactory bulb, areas that showed extensive cell loss in untreated animals. Retinal examinations indicated markers consistent with greater numbers of photoreceptor cells in supplemented mice, aligning with the observed visual benefits.
The multi‑ingredient dietary supplement was designed to address several mechanisms associated with aging—oxidative stress, inflammation, mitochondrial dysfunction, insulin resistance and other cellular deficits. In this study the formulation not only prevented further neuronal atrophy but appeared to reverse existing cell loss and restore function in multiple domains.
The research team emphasizes that while the findings in mice are highly encouraging, human trials will be required to test safety, dosing and efficacy in people with neurodegenerative conditions. The investigators plan to begin early human studies within the next two years, focusing initially on individuals affected by progressive neurological disease.
Funding: The research was supported by the Natural Sciences and Engineering Research Council of Canada, Bruce Power and the CBRN Research and Technology Initiative.
Source: Michelle Donovan, McMaster University.
Image Source: Public domain illustrative image.
Original Research: Abstract for the paper “A multi‑ingredient dietary supplement abolishes large‑scale brain cell loss, improves sensory function, and prevents neuronal atrophy in aging mice” by J.A. Lemon, V. Aksenov, R. Samigullina, S. Aksenov, W.H. Rodgers, C.D. Rollo and D.R. Boreham, published online May 20, 2026 in Environmental and Molecular Mutagenesis (doi:10.1002/em.22019).
McMaster University. “Dietary Supplement May Prevent and Reverse Damage to Aging Brain.” NeuroscienceNews. June 2, 2026.
Abstract
A multi‑ingredient dietary supplement abolishes large‑scale brain cell loss, improves sensory function, and prevents neuronal atrophy in aging mice
Transgenic growth hormone mice (TGM) serve as a model of accelerated aging, exhibiting chronic oxidative stress, shortened lifespan, mitochondrial dysfunction, insulin resistance, muscle wasting and elevated inflammation. These mice develop severe cognitive decline and marked neuronal loss. Previous work showed that a multi‑ingredient dietary supplement (MDS) designed to target multiple aging mechanisms extended longevity, reduced cognitive deterioration and lessened age‑related physical decline in both normal mice and TGM. In the present study, TGM exhibited loss of over 50% of cells in midbrain regions, including the cerebellum and olfactory bulb—loss comparable to severe Alzheimer’s disease and likely underlying their pronounced cognitive deficits. Administration of the MDS completely prevented this extensive brain cell loss, reversed cognitive decline and enhanced sensory and motor function in aged mice. Retinal histology showed markers consistent with higher photoreceptor numbers in supplemented animals. No other treatment to date has demonstrated comparable efficacy in this model, highlighting the potential of multi‑target interventions to prevent or ameliorate human neuropathologies associated with oxidative stress, inflammation and cellular dysfunction.
“A multi‑ingredient dietary supplement abolishes large‑scale brain cell loss, improves sensory function, and prevents neuronal atrophy in aging mice” by J.A. Lemon et al., Environmental and Molecular Mutagenesis. Published online May 20, 2026. doi:10.1002/em.22019