How Does Ergothioneine “Repair” Both Memory and Sleep at the Same Time?
Have you ever experienced moments like these: walking into a room and forgetting why you went there, struggling to recall a familiar name, or suffering from persistent insomnia after staying up late—followed by daytime fatigue and mental fog?
These seemingly minor discomforts are actually “maintenance alerts” sent by your brain.
Here comes the good news. In June 2025, a landmark clinical study published in the international journal Nutraceuticals brought new hope to middle-aged and older adults troubled by memory decline and sleep problems.
The study revealed that ergothioneine, a natural compound found in mushrooms, can improve cognitive function, slow memory decline, and enhance sleep quality, with its safety rigorously validated.
PART 01
What Is Ergothioneine, and Why Is It Worth Attention?
Ergothioneine is a unique naturally occurring amino acid derivative, often described as a powerful “antioxidant gift from nature.”
Its primary dietary sources are common foods: it is abundant in mushrooms such as shiitake and oyster mushrooms, and present in smaller amounts in oats, legumes, and animal organs.
What makes ergothioneine special is that the human body cannot synthesize it on its own and must obtain it from food or supplements. Moreover, the body possesses a specific transporter protein, OCTN1, which actively delivers ergothioneine to organs most vulnerable to oxidative damage, such as the brain and liver.
Research has shown that ergothioneine efficiently scavenges free radicals, protects mitochondrial function, and strengthens cellular defense mechanisms—helping the body combat oxidative stress and inflammation at their root.
PART 02
What Does a 16-Week Rigorous Clinical Trial Tell Us?
This study adopted a randomized, double-blind, placebo-controlled design and enrolled 147 adults aged 55–79 who self-reported memory decline. Participants were divided into three groups:
△ CONSORT flow diagram showing participant progress throughout the study
△ Changes in plasma ergothioneine levels over time
△ Changes from baseline in cognitive function (CNS-VS scores)
△ Subjective prospective memory
These results suggest that higher doses of ergothioneine may help participants fall asleep faster through sedative or neuroregulatory mechanisms, addressing long-standing difficulties with sleep onset.
△ Sleep onset performance
These seemingly minor discomforts are actually “maintenance alerts” sent by your brain.
Here comes the good news. In June 2025, a landmark clinical study published in the international journal Nutraceuticals brought new hope to middle-aged and older adults troubled by memory decline and sleep problems.
The study revealed that ergothioneine, a natural compound found in mushrooms, can improve cognitive function, slow memory decline, and enhance sleep quality, with its safety rigorously validated.
PART 01
What Is Ergothioneine, and Why Is It Worth Attention?
Ergothioneine is a unique naturally occurring amino acid derivative, often described as a powerful “antioxidant gift from nature.”
Its primary dietary sources are common foods: it is abundant in mushrooms such as shiitake and oyster mushrooms, and present in smaller amounts in oats, legumes, and animal organs.
What makes ergothioneine special is that the human body cannot synthesize it on its own and must obtain it from food or supplements. Moreover, the body possesses a specific transporter protein, OCTN1, which actively delivers ergothioneine to organs most vulnerable to oxidative damage, such as the brain and liver.
Research has shown that ergothioneine efficiently scavenges free radicals, protects mitochondrial function, and strengthens cellular defense mechanisms—helping the body combat oxidative stress and inflammation at their root.
PART 02
What Does a 16-Week Rigorous Clinical Trial Tell Us?
This study adopted a randomized, double-blind, placebo-controlled design and enrolled 147 adults aged 55–79 who self-reported memory decline. Participants were divided into three groups:
- 10 mg ergothioneine per day
- 25 mg ergothioneine per day
- Placebo
△ CONSORT flow diagram showing participant progress throughout the study
(1) Plasma Levels Multiply—Absorption Is Clearly Demonstrated
Clinical data showed that ergothioneine supplementation significantly increased plasma ergothioneine levels at both Week 4 and Week 16.- 10 mg group: Plasma concentration increased by approximately 6-fold after 16 weeks
- 25 mg group: Plasma concentration reached 16 times the baseline level after 16 weeks
△ Changes in plasma ergothioneine levels over time
(2) Enhanced Cognitive Function—Faster Effects at 25 mg
Cognitive performance was evaluated using the CNS Vital Signs (CNS-VS) computerized neurocognitive test:- The 25 mg group showed early improvements in memory as early as Week 4, with sustained cognitive enhancement
- The 10 mg group did not show statistically significant changes but demonstrated a positive overall trend
- The placebo group showed only minimal, non-significant improvement
△ Changes from baseline in cognitive function (CNS-VS scores)
(3) Improved Memory and Slowed Decline in Prospective Memory
In subjective prospective memory assessments (the ability to “remember to do things in the future”):- The 25 mg ergothioneine group maintained stable memory scores throughout the study, effectively resisting the natural decline trend
- The placebo group experienced a significant decrease, with statistically meaningful differences between groups
△ Subjective prospective memory
(4) Improved Sleep Quality—Especially Falling Asleep
Sleep quality assessments showed that the 25 mg/day group exhibited significant improvements in the ability to fall asleep, with a dose-dependent trend.These results suggest that higher doses of ergothioneine may help participants fall asleep faster through sedative or neuroregulatory mechanisms, addressing long-standing difficulties with sleep onset.
△ Sleep onset performance
