Albumin
One of the strongest longevity predictors hiding in your routine blood test. Low albumin signals poor nutrition, liver trouble, or chronic inflammation — often years before symptoms appear.
Albumin is the most abundant protein in your blood, made by your liver. It carries hormones, nutrients, and medications through your bloodstream and maintains fluid balance. Low albumin is one of the strongest independent predictors of all-cause mortality — making it a key longevity biomarker that most people overlook.
What is albumin?
Albumin is a protein your liver produces at a rate of about 10–15 grams per day. It makes up roughly 60% of total protein in your blood. It does three critical jobs: carries hormones, vitamins, and drugs to where they need to go; keeps fluid from leaking out of your blood vessels (oncotic pressure); and acts as an antioxidant buffer.
Because albumin production requires both a healthy liver and adequate protein intake, your albumin level reflects both your liver function and your nutritional status simultaneously. It drops when either is compromised.
What your number means
| Albumin (g/dL) | What it suggests |
|---|---|
| >4.3 | Optimal — associated with lowest mortality risk |
| 4.0–4.3 | Adequate but room for improvement |
| 3.5–4.0 | Low-normal — investigate protein intake, inflammation, liver |
| <3.5 | Clinically low — significant health risk, needs workup |
Many Indians — especially vegetarians — don't eat enough protein. The average Indian diet provides only 0.6–0.8 g/kg/day, while optimal for health and longevity is 1.2–1.6 g/kg/day. This chronic protein shortfall is one reason albumin levels tend to be lower in the Indian population compared to Western cohorts.
How to raise your albumin
- Eat more protein — aim for 1.2–1.6 g per kg body weight daily. For a 70 kg person, that's 84–112 g/day. Good sources: dal + rice (complete protein), paneer, eggs, whey protein, Greek yogurt, chicken, fish.
- Reduce chronic inflammation — inflammation suppresses albumin production. If your hsCRP or ESR is elevated, addressing the underlying cause can help albumin recover.
- Support liver health — if liver enzymes are elevated, the liver may be underproducing albumin. Address fatty liver, limit alcohol, consider NAC.
- Check for protein loss — kidney disease (nephrotic syndrome) can dump albumin into urine. If albumin is low, your doctor should check a urine albumin-to-creatinine ratio.
Track your albumin trend over time
eterni monitors albumin alongside protein intake and liver markers — so you can see whether your dietary changes are actually moving the needle.
Get early accessFrequently Asked Questions
Why is albumin considered a longevity marker?
Multiple large-scale studies show that serum albumin is one of the strongest independent predictors of all-cause mortality. People with albumin below 4.0 g/dL have significantly higher risk of death from all causes — cardiovascular disease, cancer, and infections. Albumin reflects your overall nutritional status, liver function, and inflammatory burden all in one number.
What causes low albumin?
The most common causes are inadequate protein intake (common in Indian vegetarians), chronic inflammation (albumin drops as an acute-phase response), liver disease (the liver makes albumin), and kidney disease (nephrotic syndrome causes albumin loss in urine). Chronic illness and ageing also lower albumin.
How can I raise my albumin level?
Eat adequate protein — aim for 1.2–1.6 g per kg body weight daily. For a 70 kg person, that's 84–112 g protein per day. Indian vegetarians often fall short. Add dal, paneer, eggs, whey protein, or Greek yogurt. Reduce chronic inflammation (which suppresses albumin production) and ensure your liver is healthy.
What is a normal albumin level?
Lab reference ranges are typically 3.5–5.0 g/dL. Optimal for longevity is 4.3–5.0 g/dL. Below 4.0 g/dL is associated with increased health risks even though labs may report it as normal. Below 3.5 g/dL is clinically low and warrants investigation.
Albumin and mortality — the data
In large prospective studies, each 0.5 g/dL decrease in serum albumin below 4.0 g/dL is associated with a 24–56% increase in all-cause mortality risk. This association holds across age groups and is independent of other risk factors. Albumin outperforms many commonly tracked biomarkers (like LDL cholesterol) as a mortality predictor.
The mechanism is multifactorial: low albumin reflects poor nutrition, chronic inflammation (albumin is a negative acute-phase reactant), reduced antioxidant capacity, and compromised liver synthetic function. It's essentially a composite health score in a single lab value.
Albumin as a negative acute-phase reactant
During any inflammatory process — infection, autoimmune flare, chronic disease — your liver shifts protein production away from albumin and toward inflammatory proteins like CRP and fibrinogen. This means albumin drops during inflammation, even if your nutrition is adequate. If your albumin is persistently below 4.0 but your diet has plenty of protein, check inflammatory markers (hsCRP, ESR) to see if chronic low-grade inflammation is the driver.
Know what's working. Know what's not.
eterni connects your lab results, supplements, and retests — so you can see the trajectory, not just a snapshot.
Join the waitlist