Evidence-Based Supplement & Herb Guides

Zinc Acetate vs Zinc Gluconate Lozenges: Which Works Better and How to Use Them

Compare zinc acetate and zinc gluconate lozenges for colds, learn which factors matter most, how to use them correctly, and when zinc may help shorten symptoms.

When a cold starts, zinc lozenges are one of the few over-the-counter options that may do more than simply mask symptoms. But the details...

Zinc and Copper Balance: Why Too Much Zinc Can Backfire and What to Do

Learn why too much zinc can lower copper, trigger anemia or nerve symptoms, and undermine immune health, plus what to do and how to use zinc more safely.

Zinc has earned a strong reputation in immune health, and for good reason. It helps support barrier tissues, cell signaling, and normal immune responses....

Zinc for Immune Support: Best Forms, Dosage, and Side Effects

Learn how zinc supports immune health, which forms make sense, what doses are reasonable, when lozenges may help a cold, and how to avoid common side effects.

Zinc is a small mineral with a big job. Your body uses it to build immune cells, protect barrier tissues, heal wounds, and help...

Zinc Lozenges for Colds: How to Use Them for Best Results

Learn how to use zinc lozenges for colds, when to start them, what dose and form matter most, and how to avoid common side effects and mistakes.

A good zinc lozenge can be one of the few over-the-counter cold remedies with at least some evidence behind it. That does not mean...

Zinc Nasal Sprays: Smell Loss Risk and Better Options for Cold Season

Learn why zinc nasal sprays may raise smell-loss concerns, which safer cold-season options work better, and how to treat congestion without making things worse.

A blocked nose can make almost any cold feel worse. When you are tired, sleeping poorly, and cycling through tissues all day, a product...

ACEs Screening: How Adverse Childhood Experiences Are Assessed

Learn how ACEs screening works, what adverse childhood experiences questionnaires measure, how scores are interpreted, what happens after a positive screen, and where this assessment has limits.

Adverse childhood experiences can shape health, stress responses, relationships, learning, and emotional well-being long after childhood ends. ACEs screening is one way clinicians, schools,...

ADHD Testing in Children: How the Diagnostic Process Works

Learn how ADHD testing in children really works, including what the evaluation includes, how doctors diagnose ADHD, what conditions can mimic it, and what happens next.

A child who seems constantly distracted, impulsive, restless, forgetful, or unable to finish schoolwork may be struggling for many different reasons. Attention-deficit/hyperactivity disorder is...

ADHD vs Learning Disability: How Testing Separates the Two

Learn how ADHD and learning disability testing differ, what each evaluation measures, why the symptoms overlap, and how clinicians and schools identify the right diagnosis and support.

A child who rushes through reading, forgets assignments, avoids writing, or makes repeated math errors may be struggling with ADHD, a learning disability, or...

ADOS Autism Test: What It Measures and When It Is Used

Learn what the ADOS autism test measures, how ADOS-2 modules work, when clinicians use it, and how results fit into a full autism evaluation.

The ADOS is one of the best-known tools used during an autism evaluation, but it is often misunderstood. It is not a quick quiz,...

Adult ADHD Testing: How ADHD Is Diagnosed in Adults

Learn how adult ADHD testing works, what doctors look for, which tools may be used, and how ADHD is diagnosed in adults using history, symptoms, impairment, and differential diagnosis.

ADHD can be missed until adulthood, especially when a person learned to compensate, had mainly inattentive symptoms, or was seen as “high functioning” despite...

AI in Cognitive Testing: How New Tools Are Being Used

Learn how AI is being used in cognitive testing, from digital drawing and speech analysis to remote monitoring, along with the benefits, risks, and limits that still matter.

Artificial intelligence is beginning to change how cognitive testing is delivered, scored, and interpreted. The most visible changes are not robots diagnosing dementia or...

AI in Mental Health Diagnosis: What It Can Do, What It Cannot Do, and Where It Falls Short

Learn what AI can really do in mental health diagnosis, where it helps clinicians, why it still falls short, and how to judge AI screening, chatbot, and diagnostic tools safely.

Artificial intelligence is already influencing mental health care, but not in the simple way many people imagine. It is not a digital psychiatrist that...

Alcohol Use Screening: How Doctors Test for Problem Drinking

Learn how doctors screen for problem drinking, which alcohol screening tests they use, what a positive result means, and what usually happens after alcohol use screening.

Alcohol use screening is a routine way for doctors to identify drinking patterns that may be affecting health, safety, mood, sleep, medications, relationships, work,...

Alzheimer’s Testing and Diagnosis: What the Workup Looks Like

Learn what an Alzheimer’s workup includes, from history, cognitive testing, labs, and MRI to biomarker tests such as amyloid blood tests and PET scans, and how doctors reach the diagnosis.

When memory, thinking, language, or daily decision-making changes become noticeable, the goal of an Alzheimer’s workup is not simply to “take a memory test.”...

Amyloid Blood Tests: What They Show and Who They Are For

Learn what amyloid blood tests show, who they are for, how results are interpreted, and how they compare with PET scans and spinal fluid testing.

Amyloid blood tests are changing how clinicians evaluate possible Alzheimer’s disease, but they are not simple “yes or no” memory-loss tests. They look for...

Amyloid PET Scan: How It Helps in Alzheimer’s Diagnosis

Learn what an amyloid PET scan shows, when doctors use it in Alzheimer’s diagnosis, how to interpret positive and negative results, and how it compares with blood tests, MRI, CSF, and tau PET.

Memory loss, confusion, word-finding trouble, and changes in daily function can have many causes. Alzheimer’s disease is one important possibility, but it is not...

Anxiety Screening: How Doctors Screen for Anxiety Disorders

Learn how doctors screen for anxiety disorders using tools like the GAD-2 and GAD-7, clinical questions, and follow-up evaluation to decide what symptoms may need treatment.

Anxiety screening is usually the first step in finding out whether worry, fear, panic, avoidance, or physical tension may be part of an anxiety...

Anxiety vs ADHD: How Doctors Tell the Difference

Learn how doctors tell anxiety from ADHD by comparing symptoms, triggers, timeline, testing, and overlap so the right diagnosis and treatment are easier to understand.

Trouble concentrating can feel confusing when anxiety and ADHD both seem possible. A person may feel restless, forgetful, scattered, overwhelmed, or unable to finish...

APOE Genetic Testing for Alzheimer’s Risk: What It Can and Cannot Tell You

Learn what APOE genetic testing for Alzheimer’s risk can and cannot tell you, how to interpret e2, e3, and e4 results, and when genetic counseling matters most.

APOE genetic testing can feel both useful and unsettling because it gives information about future Alzheimer’s risk, not a simple yes-or-no answer. A result...

ASQ Suicide Screening: What It Measures and When It Is Used

Learn what the ASQ suicide screening tool measures, where it is used, what a positive screen means, and how it fits into clinical suicide risk assessment and next-step safety planning.

Suicide risk can be difficult to recognize from appearance, mood, or the reason someone came to a clinic or emergency department. Some people who...