症状・状態

18 エビデンスに基づいたサプリメント研究のある健康状態

Explore health conditions with evidence-graded supplement recommendations. Each condition page ranks ingredients by the strength of clinical research supporting them.

How We Grade Evidence

各症状ページでは、臨床エビデンスの強さに基づいてサプリメント成分をランク付けしています。各グレードの意味は以下の通りです：

Strong Evidence

Multiple randomized controlled trials (RCTs) or meta-analyses with consistent positive results and large sample sizes.

Good Evidence

At least one RCT with mostly consistent results across studies. Evidence suggests benefit but more research may be needed.

Some Evidence

Small studies or observational data with some positive signals. Promising but insufficient for strong recommendations.

Very Early Research

In vitro studies, case reports, or pilot studies only. Early-stage research that requires clinical validation.

Perimenopause Cognitive Changes

Affects up to 60% of women during perimenopause (typically ages 45-55)

Verbal memory difficulties Difficulty concentrating Slower processing speed +2

Age-Related Cognitive Decline

Affects virtually all adults to some degree after age 50

Slower processing speed Difficulty with multitasking Word-finding difficulties +2

Post-Concussion Cognitive Symptoms

1.6-3.8 million concussions/year in the US; 10-30% develop persistent symptoms

Persistent headache Difficulty concentrating Memory problems +2

Chemotherapy-Related Cognitive Impairment

Reported by 17-75% of cancer patients undergoing chemotherapy

Memory difficulties Trouble concentrating Difficulty multitasking +2

Brain Fog

Reported by 20-30% of the general population

Difficulty concentrating Mental confusion Poor short-term memory +2

Attention & Focus Difficulties

Among the most reported cognitive complaints across all age groups

Difficulty sustaining attention Easy distractibility Trouble completing tasks +2

Mental Fatigue

Highly prevalent in modern knowledge-work environments

Difficulty concentrating for extended periods Increased error rates Reduced motivation +2

Sleep-Related Cognitive Impairment

35% of adults sleep less than 7 hours; 50-70 million have sleep disorders

Daytime drowsiness Impaired memory consolidation Reduced reaction time +2

Oxidative Stress & Neuroinflammation

Universal process that accelerates with age and environmental exposure

Accelerated cognitive aging Increased susceptibility to neurodegeneration Chronic low-grade brain inflammation +1

Neurotransmitter Imbalance

Contributing factor in most cognitive and mood disorders

Mood instability Cognitive slowness Reduced motivation +2

Long COVID Cognitive Symptoms

Reported by 20-30% of COVID-19 survivors

Persistent brain fog Memory difficulties Impaired executive function +2

Cerebrovascular Health

Cerebrovascular risk factors present in 60%+ of adults over 60

Reduced mental sharpness Dizziness Difficulty with complex reasoning +1

Mild Cognitive Impairment (MCI)

15-20% of adults over 65

Noticeable memory lapses Difficulty with complex reasoning Impaired judgment +2

Memory Loss

40% of adults over 65 experience some form of age-associated memory impairment

Difficulty remembering recent events Frequently misplacing items Trouble recalling names +2

Anxiety-Related Cognitive Impairment

Anxiety disorders affect 19% of US adults annually

Racing thoughts Difficulty concentrating Impaired decision-making +2

Depression-Related Cognitive Dysfunction

8.4% of US adults experience major depression; cognitive symptoms in 90%+ of episodes

Impaired concentration Indecisiveness Psychomotor retardation +2

Stress-Induced Cognitive Decline

Chronic stress reported by 77% of US adults

Difficulty concentrating under pressure Memory retrieval problems Impaired decision-making +2

Nutritional Deficiency Cognitive Impairment

40% of geriatric memory patients deficient in at least one brain-related vitamin

Progressive cognitive decline Memory impairment Fatigue and brain fog +2

FDAに関する免責事項: これらの記述は米国食品医薬品局（FDA）による評価を受けていません。本ウェブサイトの製品および情報は、疾病の診断、治療、治癒、または予防を目的としたものではありません。表示されているエビデンスグレードは、公開された査読済み研究の分析に基づいており、医療上の助言を構成するものではありません。サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。