Evidence-Based Supplement & Herb Guides

MRI vs CT Scan for Brain Symptoms: Which Test Is Better and Why?

Learn when MRI is better than CT for brain symptoms, when CT should come first, and how doctors decide which scan makes the most sense in emergencies and routine workups.

When someone has headaches, confusion, memory changes, dizziness, weakness, seizures, or other brain-related symptoms, imaging may be part of the medical workup. The common...

MSLT Sleep Test: What It Measures for Excessive Daytime Sleepiness

Learn what the MSLT sleep test measures, how it is used for excessive daytime sleepiness, what results may suggest, and why preparation matters for narcolepsy and idiopathic hypersomnia evaluation.

Excessive daytime sleepiness is more than feeling tired after a poor night’s sleep. It means the brain has trouble staying awake when wakefulness should...

Neuropsychological Testing After Concussion or Brain Injury

Learn when neuropsychological testing is useful after concussion or brain injury, what it measures, when to do it, how results are interpreted, and how testing helps guide recovery.

After a concussion or traumatic brain injury, symptoms can be hard to interpret. Headaches, fatigue, slower thinking, memory lapses, irritability, dizziness, poor sleep, and...

Neuropsychological Testing for ADHD: When It Helps and When It Does Not

Learn when neuropsychological testing can help with ADHD, when it often does not add much, and what test results can and cannot actually prove.

ADHD is diagnosed by understanding a person’s symptoms, development, functioning, and everyday patterns over time. Neuropsychological testing can add valuable information, especially when the...

Neuropsychological Testing for Autism, Learning Problems, and Executive Dysfunction

Learn how neuropsychological testing helps clarify autism, learning problems, and executive dysfunction, what the evaluation includes, and how results guide diagnosis, accommodations, and next steps.

Neuropsychological testing can help clarify why a person struggles with communication, learning, attention, organization, memory, processing speed, problem solving, or everyday independence. It is...

Neuropsychological Testing for Dementia and Memory Loss

Memory changes can be unsettling, especially when they affect conversations, finances, appointments, driving, work, or daily routines. Neuropsychological testing helps clarify whether those changes...

Neuropsychological Testing: What It Measures and When It Is Needed

Learn what neuropsychological testing measures, when it is needed, how it differs from simpler cognitive tests, and what the results can show for children, adults, and older adults.

Neuropsychological testing is a detailed way to understand how thinking skills, emotions, behavior, and brain function are working together. It is often used when...

OCD Screening: How Doctors Assess Obsessions and Compulsions

Learn how OCD screening works, what doctors ask about obsessions and compulsions, which tools they use, how they separate OCD from anxiety and other conditions, and what a positive screen means.

OCD screening is often the first step in figuring out whether intrusive thoughts, repetitive behaviors, mental rituals, or avoidance patterns may be part of...

OCD vs Anxiety: How Doctors Tell the Difference

Learn how doctors tell OCD from anxiety by examining obsessions, compulsions, worry patterns, assessment tools, overlap with other disorders, and why the diagnosis changes treatment.

OCD and anxiety can feel closely connected because both can involve fear, distress, avoidance, body tension, sleep problems, and a strong urge to make...

Online Mental Health Tests: Are They Accurate and Worth Taking?

Learn which online mental health tests can be useful, where their accuracy breaks down, and how to use results wisely without mistaking a screening score for a diagnosis.

Online mental health tests can be useful when they help you name what you are experiencing, notice patterns, and decide whether it is time...

Panic Attack vs Anxiety Disorder: How Doctors Tell the Difference

Learn how doctors tell the difference between a panic attack and an anxiety disorder, what symptoms matter most, what medical causes they rule out, and when to seek urgent care.

A racing heart, chest tightness, dizziness, shaking, and a sudden fear that something is terribly wrong can feel alarming, especially when symptoms come out...

Panic Disorder Assessment: How It Differs From General Anxiety Screening

Learn how panic disorder assessment works, how it differs from general anxiety screening, which tools clinicians use, what doctors try to rule out, and what happens after evaluation.

Panic symptoms can look like many other problems: a racing heart, chest tightness, dizziness, shortness of breath, trembling, nausea, or a sudden fear that...

PC-PTSD-5 vs PCL-5: PTSD Screening and Assessment Explained

Learn the difference between PC-PTSD-5 and PCL-5, when each PTSD tool is used, how scoring works, and what a positive trauma screen should lead to next.

PTSD screening tools can be useful, but they are often misunderstood. A short questionnaire can help identify symptoms that deserve attention, yet it cannot...

Perinatal Mental Health Screening: Depression, Anxiety, and OCD Screening After Childbirth

Learn how perinatal mental health screening works after childbirth, including how doctors screen for postpartum depression, anxiety, and OCD, what tools they use, and what a positive result means.

The weeks and months after childbirth can bring emotional shifts, sleep disruption, physical recovery, feeding stress, relationship strain, and sudden responsibility for a newborn....

Personality Disorder Assessment: How Doctors Evaluate Long-Term Patterns

Learn how doctors assess personality disorders by examining long-term patterns, relationship history, emotional regulation, differential diagnosis, structured interviews, and what happens after evaluation.

Personality disorder assessment is not a quick quiz, a brain scan, or a single conversation. It is a careful clinical process used to understand...

PET Scan for Brain Disorders: What It Shows and When It Is Used

Learn what a PET scan for brain disorders can show, when doctors use it for dementia, seizures, and tumors, and why PET is helpful only when it answers a specific clinical question.

A PET scan is a brain imaging test that looks at activity inside the brain, not just its shape. Instead of showing only anatomy,...

PHQ-2 vs PHQ-9: Which Depression Screening Test Is Used and Why?

Learn the difference between the PHQ-2 and PHQ-9, when doctors use each depression screening test, how scores are interpreted, and what happens after a positive result.

Depression screening often starts with a short questionnaire, but the result can feel confusing if you do not know what the tool is meant...

PHQ-9 Depression Test: What Your Score Means

Understand PHQ-9 score ranges, what each depression test result may mean, when question 9 needs urgent follow-up, and how clinicians interpret PHQ-9 results in real care.

The PHQ-9 is one of the most common questionnaires used to screen for depression and track depressive symptoms over time. It is brief, practical,...

Polysomnography: What a Sleep Study Measures

Learn what an overnight sleep study records, how polysomnography is used for sleep apnea and other sleep disorders, what happens during testing, and how results are interpreted.

A sleep study can look simple from the outside: a night in a sleep lab, some sensors, and a report afterward. In practice, polysomnography...

Postpartum Depression Screening: EPDS, Follow-Up Assessment, and What Happens Next

Learn what the EPDS can and cannot show, how postpartum depression screening is interpreted, what follow-up assessment usually includes, and which symptoms need urgent care.

Postpartum depression screening is meant to notice emotional distress early, before symptoms become harder to manage or easier to dismiss as “just exhaustion.” A...