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THE VELRI LIBRARY

Understand your health. Know what to ask.

Guides to treatments, lab results and common health questions. Sources are listed in every article.

All guides

201 guides · Page 17 of 17
Weight & Metabolic

Insulin resistance: which tests help assess glucose?

Insulin resistance and prediabetes are related but different. A1c, fasting glucose, and glucose-tolerance testing help assess the glucose picture.

2 sources · NIHRead · 2 min →
Trust & Safety

Hair shedding vs. thinning: how the pattern helps

Sudden shedding and gradual thinning can have different causes. Timing, scalp symptoms, and an examination guide the assessment.

Read · 2 min →
Biomarkers & Labs

Which blood tests answer your health question?

A CBC, metabolic panel, cholesterol test and A1C measure different things. How to connect the test to the question instead of buying more numbers.

Read · 2 min →
Hormones & Vitality

Low testosterone in men: how it is diagnosed

Symptoms and consistently low test results both matter. Learn why timing, repeat measurements, and the underlying cause are part of the assessment.

2 sources · Endocrine SocietyRead · 2 min →
Longevity & PerformanceLongevity

NAD+ and NMN: what human research actually measures

Raising an NAD-related blood marker is different from improving fatigue or extending life. Human trials answer narrower questions than many aging claims.

3 sources · PubMed / PMCRead · 2 min →
Weight & Metabolic

GLP-1 side effects in the first weeks

Nausea and bowel changes are common with semaglutide and tirzepatide. Severity, persistence and warning symptoms determine what needs attention.

3 sources · NIHRead · 2 min →
Weight & Metabolic

How GLP-1 medications work in weight management

GLP-1 medications affect appetite, blood glucose, and digestion. Understand the mechanism without mistaking it for a promised result.

3 sources · FDA, NIHRead · 2 min →
Trust & Safety

Questions to ask about a compounded medication

Understand the medical reason, preparation, pharmacy, and instructions before using a compounded prescription.

3 sources · FDARead · 2 min →
Trust & Safety

What “not FDA-approved” means for compounded medications

Compounded medicines are not FDA-approved generics. Understand what FDA approval does and does not establish before considering a prescription.

2 sources · FDARead · 2 min →