Most blood tests tell you
if you're sick.
Vigil tells you where you're heading.

ApoB

Heart & circulation

The particle that actually deposits cholesterol into artery walls. A more accurate signal of cardiovascular risk than LDL — yet your GP is unlikely to order it unless you push. Longevity ranges are considerably tighter than clinical normal.

Lp(a)

Heart & circulation

Genetically determined and largely unchangeable — which makes knowing it early all the more important. Elevated Lp(a) is the most common inherited cardiovascular risk factor, present in roughly 1 in 5 people. Almost never tested routinely.

HbA1c

Blood sugar

Your three-month average blood sugar. Even sub-diabetic elevations compress healthspan — accelerating cellular ageing and increasing risk across multiple systems. Most GPs won't act until the reading approaches diabetic range. Vigil flags it sooner.

Fasting glucose

Blood sugar

A snapshot of insulin sensitivity. Read alongside HbA1c, it reveals whether blood sugar dysregulation is recent or chronic. The optimal longevity range sits below what most labs would mark as abnormal.

hs-CRP

Inflammation

Low-grade chronic inflammation is the common thread behind most age-related disease. hs-CRP is its most sensitive early signal — detectable years before symptoms emerge. Standard CRP tests miss the range that matters for longevity.

Testosterone

Hormones

Relevant for both men and women, though at very different ranges. Suboptimal levels affect energy, body composition, mood, and cognitive sharpness years before a GP would intervene — because GPs act on clinical deficiency, not optimal function.

SHBG

Hormones

Sex hormone-binding globulin determines how much of your testosterone is actually available to tissues. Total testosterone can look fine while free testosterone is low — SHBG is why. Rarely interpreted in context on standard results.

Ferritin

Inflammation & nutrients

Both a marker of iron stores and an acute-phase protein — meaning it rises with inflammation. The optimal range is a narrow window: too low signals depletion, too high signals either iron overload or systemic inflammation. Standard ranges miss both ends.