If you are serious about aging well and glowing well, then your routine physical lab work isn’t cutting it. Yes, a standard cholesterol panel is important, and so are glucose levels. BUT the real longevity girlies know there are a few markers that aren’t typically tested that will tell a whole lot more about what is happening under the surface. These are the labs that can show inflammation, insulin resistance, hidden cardiovascular risk, and the kind of metabolic stress that can stay hidden if you are only coming in for a routine wellness visit. 

Here are six blood tests worth knowing, and why they deserve a spot on your longevity radar. 

1. IGF-1 (insulin-like growth factor 1)

IGF-1 is tied to growth hormone and helps to regulate growth, tissue repair, and metabolism. In the longevity world, IGF-1 is a balance marker. Levels that are chronically high can signal tumors or increased cancer risk. Levels that are chronically low are linked to frailty, sarcopenia, and poor resilience. 

2. Fasting insulin

Fasting insulin is one of my favorite “catch it early” labs because insulin resistance often begins brewing way before blood sugar and A1c begin to look dramatic. You can have a glucose marker that looks fine while your body is working too hard behind the scenes to provide these “normal” results. An insulin blood test can assess how much insulin your pancreas is really making, and it can be used alongside other labs to help diagnose insulin resistance. This is why fasting insulin gives you a true read on metabolic health, energy regulation, and future risks. 

3. Homocysteine 

Homocysteine is an amino acid found in blood, but when it runs high it can be a clue that something is off with B vitamins (especially folate, B6, or B12). Elevated levels are also associated with a higher risk for blood clots, heart disease, and strokes (but it is not a perfect crystal ball). While this marker is helpful, we still need context. Think of it like a clue- a high level tells you to look closer (especially if someone is tired, inflamed, aging faster than they should be, or not absorbing nutrients well). 

4. ApoB (apolipoprotein B)

ApoB is one of the best markers for true atherogenic particle burden. ApoB shows the number of cholesterol carrying particles that can enter artery walls and contribute to plaque. Each of these particles carry one apoB molecule (meaning apoB is basically just a particle count)! ApoB is being considered a more reflective value of cardiovascular risk than LDL cholesterol alone since your LDL levels may look relatively normal (even though you may still have more artery-irritating particles circulating than what is optimal).

5. Lp(a) (lipoprotein(a))

Lipoprotein(a) is one of the most important blood tests that people don’t talk about often enough. While it is largely genetically determined, high levels are associated with higher risk of heart attack, stroke, peripheral artery disease, and aortic valve disease. Lp(a) is an inherited value that can explain hidden risks in someone that appears healthy on a standard lipid panel. You only need to measure it one time, but it is important to do especially if there is a family history of heart disease. 

6. hs-CRP (high sensitivity C-reactive protein)

hsCRP measures low grade inflammation and has been linked to future cardiovascular risk. Since chronic inflammation is one of the most important factors in long term disease risk, hsCRP levels are being looked at in the longevity world. Typically, less than 1mg/L is considered lower risk, 1-3mg/L is considered average or intermediate risk, and above 3mg/L is considered higher risk. If a CRP level comes back as higher than 10mg/L, providers typically repeat the test and look for infection or other active inflammatory causes before interpreting the values for cardiovascular ris. 

Which Blood Test Matters Most:

Honestly? There isn’t one single “magical marker”. The magic is in the pattern of all of these markers together. When these markers are measured, they offer a much more clear picture of how you are aging in comparison to a standard panel alone. That is the whole vibe of longevity- not waiting for disease. Not guessing, and not being fooled by the “normal”. It’s about getting better data (early on) so that you can make smart choices when you still feel good.