Capacity 01 · Regulate Energy
Signal · TG:HDL Ratio
The cheapest window into fuel traffic and particle size.
The ratio of triglycerides to HDL cholesterol, taken from a standard lipid panel, is one of the most information-dense numbers in metabolic coaching. It's a proxy for insulin resistance, a proxy for lipoprotein particle size, and a first-look signal of how the liver is handling the current fuel load.
The ranges that matter
Simple math. Rich signal.
Take your fasting triglycerides and divide by your HDL. Both numbers are on almost every basic lipid panel.
Fit / Optimal
< 2.0
Lipoprotein particles tend to be large and buoyant. Insulin sensitivity is likely preserved.
Well
2.0 – 3.0
Drifting. Early sign that the liver's fuel handling is strained.
Sick / At Risk
> 3.0 (severe > 4.0)
Particles tend to be small and dense. Strong proxy for insulin resistance and elevated cardiovascular risk.
What it reveals
Triglycerides are stored fuel traffic.
Triglycerides are the form fat travels in. When dietary carbohydrate exceeds what the body can burn or store as muscle glycogen, the liver converts the surplus to triglyceride and sends it out to be stored — and a lot of it gets stored in places the body didn't intend, starting with the liver itself.
HDL — high-density lipoprotein — is the cleanup crew. It carries excess cholesterol back to the liver for recycling. When triglycerides rise, HDL tends to fall, and the ratio stretches. That stretching is a physical expression of fuel regulation breaking down.
What makes TG:HDL valuable isn't any single mechanism — it's the convergence. A rising ratio usually means three things are happening at once: insulin sensitivity is declining, lipoprotein particles are becoming smaller and denser, and the liver is accumulating fuel it can't process.
On the floor
TG:HDL responds quickly to nutrition changes — sometimes within weeks. That makes it a high-signal marker to re-test when a client is working on nutrition structure. A number that was 2.8 at baseline and 1.6 at re-test is a real signal the intervention is working.
What moves it
The liver wants a break.
First levers
- Cut liquid sugar — especially fructose-heavy drinks. Fructose is processed almost entirely by the liver.
- Reduce refined starch and ultra-processed carbohydrate.
- Anchor protein. It reduces the glycemic load without adding liver-bound fructose.
- Build in an eating window — give the liver hours of actual fasted state each day.
Second levers
- Zone 2 aerobic work pulls triglycerides into working muscle as fuel.
- Strength training improves lipoprotein particle quality independent of body weight.
- Address visceral fat — it tracks closely with TG:HDL and drives the same physiology.
- Re-test in 8–12 weeks. Look at the direction, not the single number.
Why it sits with "Regulate Energy"
TG:HDL is the fastest-moving of the four Regulate Energy markers. It responds to nutrition changes quickly, which makes it the best short-loop feedback signal for whether a nutrition intervention is working. Read alongside
HbA1c,
Fasting Insulin, and
ApoB.
Go deeper
Coaching and education only. Not medical diagnosis or treatment.