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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.

Longevity & Performance

59 guides · Page 3 of 5
Longevity & PerformanceLongevity

Lp(a): the inherited risk a standard cholesterol test can miss

Lp(a) is a separate cardiovascular risk marker. Current guidance recommends testing adults at least once in a lifetime.

Read · 2 min →
Longevity & PerformanceLongevity

Ashwagandha and rhodiola: what “adaptogen” means

What adaptogen claims mean, how the evidence differs for ashwagandha and rhodiola, and which safety questions matter.

4 sources · FDA, NIHRead · 2 min →
Longevity & PerformanceLongevity

A low HRV reading: what your wearable can tell you

Heart rate variability measures timing between beats. The method, recording length, and your symptoms matter more than a single app score.

3 sources · PubMed / PMCRead · 2 min →
Longevity & PerformanceLongevity

Tracking strength through perimenopause

A consistent strength record can make changes easier to discuss. Grip readings, everyday function, and body weight answer different questions.

3 sources · PubMed / PMCRead · 2 min →
Longevity & PerformanceLongevity

Melatonin for night-shift sleep: what it can and cannot answer

Melatonin affects sleep timing, but shift-work studies have limitations. Sleep opportunity, light, schedule and other sleep problems still need attention.

3 sources · NIHRead · 2 min →
Longevity & PerformanceLongevity

Oral or IV iron after childbirth: what guides the decision?

Iron treatment depends on confirmed deficiency, symptoms, severity, and response. An infusion is not an automatic answer to postpartum fatigue.

3 sources · NIHRead · 2 min →
Longevity & PerformanceLongevity

Fatigue with normal thyroid tests: what has been checked?

Normal thyroid results answer a thyroid question. Persistent fatigue may still need assessment of sleep, medicines, mood or other causes.

4 sources · NIH, Endocrine SocietyRead · 2 min →
Longevity & PerformanceLongevity

Do peptides build muscle? The ingredient and human evidence matter

“Peptide” describes a molecule, not a muscle-building effect. Learn what strength, lean mass and human studies can actually show.

3 sources · FDA, PubMed / PMCRead · 1 min →
Longevity & PerformanceLongevity

Night shifts and glucose: what an energy crash can tell you

Night work can affect glucose regulation, but fatigue alone cannot identify high or low blood sugar. Research findings and diagnostic tests differ.

4 sources · PubMed / PMC, NIHRead · 2 min →
Longevity & PerformanceLongevity

Peptides and “reverse aging” claims: what evidence would count?

A biomarker change, early safety study and longer life are different findings. How to assess the evidence behind peptide longevity claims.

4 sources · FDARead · 2 min →
Longevity & PerformanceLongevity

Ferritin and afternoon fatigue: what an iron test can show

Ferritin measures stored iron. Learn why fatigue, inflammation and other blood tests matter when interpreting the result.

Read · 2 min →
Longevity & PerformanceLongevity

Homocysteine, B12, and trouble concentrating

Homocysteine can contribute to a vitamin-deficiency assessment, but it does not diagnose the cause of brain fog. Learn how the tests fit together.

3 sources · NIHRead · 2 min →