Model: SAMP8 mice (5 months old) and C57BL/6 mice (16 months old)
Dosage: 1.5 mg/kg of urolithin A was administered by intraperitoneal injection three times per week (Monday, Wednesday, and Friday) for 8 weeks.

Study shows that urolithin A preserves memory and cognitive function during aging when treatment begins before age-related decline, but does not reverse cognitive impairment once it is established.

Brain &amp; Neurons

Model: Old (17- to 19-month-old) C57BL6 mice 
Dosage: 14 mg/mg/day of rapamycin in food for 5 months

A purported longevity drug, rapamycin, alters immune cells associated with cancer and reduces brain inflammation in mice. 

Immunity

Model: Older adults (60–85 years old) with mild cognitive impairment (MCI) enrolled in a randomized, double-blind, placebo-controlled clinical trial.
Dosage: Participants received one gastro-resistant capsule daily for 180 days, containing either 250 mg of Kluyveromyces fragilis yeast extract, 350 mg of Saccharomyces cerevisiae yeast extract, or a placebo.

Yeast Supplement Improves Cognitive Function in Older Adults with Mild Cognitive Impairment

Daily supplementation with nucleotide-rich yeast extracts improves cognitive performance and mental well-being in older adults with mild cognitive impairment, researchers find. 

Model: Six adults who received intravenous NAD+ and eight adults who received intravenous NR
Dosage: 500 mg of intravenous NAD+ or 500 mg of intravenous NR daily for four consecutive days

Pilot Human Study Supports Safety of NAD+ IV and NR IV Infusions

A Stanford study supports the short-term safety of NAD+ and NR infusion therapies, and participants who received NR infusions exhibited significantly lower HbA1c (a blood test that reflects average blood sugar over two to three months).

(An IV bag containing a solution with NAD+ | Crete Fertility Centre)

A Stanford human trial provides the first data supporting the safety of NAD+ IV and NR IV therapies.

Duke University scientists have successfully induced new neuronal connections in the brains of mice, leading to improvements in social interaction and stress resilience. 

Search Result: neurodegenerative condition

Urolithin A Preserves Memory During Aging When Treatment Begins Early, Study Shows

Rapamycin Elevates Immune Cells That Can Battle Cancer Cells, New Study Shows

Yeast Supplement Improves Cognitive Function in Older Adults with Mild Cognitive Impairment

Pilot Human Study Supports Safety of NAD+ IV and NR IV Infusions

Can We Reverse Memory Loss? Duke Scientists Find New Way to Rewire the Brain