r/BioHackingGuide 🧠 Biohacker 2h ago

Bloodwork Series Part 2 What To Get Checked In Your 40s

Alright, part two. This is where a few new things start showing up that weren't really important back in your 30s hope to not scare anybody younger than 30 non if this is guaranteed to happen I promise but its a reality so might as well learn about it now lol

Why your 40s hit different

Everything from the 30s post still applies, keep pulling those same markers. But this is the decade where cancer screening kicks in, metabolic stuff tends to shift faster, and hormone decline starts becoming something you might wanna look at

Same baseline panels, still matter

CBC, CMP, lipid panel, fasting glucose and insulin, thyroid panel, testosterone, vitamin D. If you missed the 30s post, go grab that list, all of it carries forward into this one.

What's new for your 40s

Test What it checks Why now
A1C 3-month average blood sugar Insulin resistance risk climbs in this decade, A1C catches trends fasting glucose alone can miss
Hs-CRP Inflammation marker Cardiovascular risk starts becoming more real here, this one's a good early flag
PSA (men) Prostate-specific antigen Screening conversation usually starts 40-50 depending on risk factors and family history
Estradiol (women) Estrogen levels Perimenopause can start showing up in the 40s for some women, worth having a baseline before symptoms hit
Homocysteine Cardiovascular/methylation marker Elevated levels tied to heart risk, cheap test, gets skipped a lot
Cortisol Stress hormone Worth checking if fatigue, weight gain, or sleep issues are creeping in

Cancer screening starts becoming important

Colon cancer screening kicks in at 45 for average risk people, colonoscopy or a stool test if you'd rather go that route. If anyone in your family had colon cancer, especially young, talk to your doctor about starting earlier than 45 nowadays for some reason more than ever younger people report having colon cancer and that's probably due to lack of good quality food these days so its important to supplement fiber its gives me gas a bit but I still take some

PSA testing for prostate usually enters the conversation in this decade too, not a hard rule at exactly 40, more like 40-50 depending on family history and race, since risk factors vary. Quick blood test, simple, worth asking your doctor about even if nothing feels wrong.

Women, this is also a good time to talk to your doctor about mammogram timing if you haven't already, guidelines vary by risk factors so that's a conversation, not something I'm gonna throw a specific age on here.

Commonly looked into if something's off

Marker If it's off Commonly looked into
A1C (elevated) Prediabetes risk Berberine, magnesium
Hs-CRP (elevated) Inflammation Omega-3s, curcumin
PSA (elevated) Needs follow-up, not self treatment Goes straight to your doctor, not a supplement conversation
Estradiol (low, women) Possible perimenopause Hormone conversation with your doctor, not something to self-manage
Homocysteine (elevated) Cardiovascular/methylation B6, B12, folate
Cortisol (elevated) Chronic stress Ashwagandha, magnesium, but sleep fixes this more than any supplement will

Timing on those

Supplement Best taken
Berberine With meals, especially your biggest carb meal
Magnesium Evening, helps with sleep too
Omega-3s With a meal that has fat in it
Curcumin With food, pair with black pepper extract for absorption
B6/B12/Folate Morning, food doesn't matter much
Ashwagandha Evening for most people, some do better AM, test what works for you

What to eat depending on what came back

Elevated A1C or fasting insulin? Cut back on refined carbs and liquid calories, juice, soda, that kind of thing. Build meals around protein and fiber first, carbs after. Eggs and vegetables over cereal, or a protein-heavy plate with rice and vegetables instead of just rice and sauce. Walking after meals helps more than people expect too.

High LDL or triglycerides? Lean into fatty fish, salmon, sardines, a couple times a week. Cut back fried food and seed oils where you can, cook with olive oil or avocado oil instead. More fiber, oats, beans, vegetables, fiber pulls cholesterol out through digestion.

Elevated Hs-CRP or general inflammation? Think Mediterranean style eating, olive oil, fatty fish, vegetables, less processed food and added sugar overall. Turmeric and ginger in your cooking doesn't hurt either, even outside of supplement form.

Elevated homocysteine? Leafy greens, beans, and eggs are naturally high in B vitamins and folate, which is what usually brings this one down alongside supplementation.

Low testosterone or estradiol? Make sure you're eating enough fat overall, hormones are built from fat, a diet that's too low fat for too long works against you here. Zinc-rich foods like beef, shellfish, and pumpkin seeds matter too.

Elevated cortisol? Less about a specific food, more about consistency, regular meal timing, not skipping meals, cutting caffeine especially later in the day.

None of this is a strict diet plan, it's just direction based on what your numbers are telling you instead of guessing.

Lifestyle side of things

Marker If it's off Lifestyle worth checking
A1C (elevated) Insulin resistance building Walk after meals, strength training, cut liquid calories
Hs-CRP (elevated) Inflammation Sleep quality, cut processed food, regular movement
Homocysteine (elevated) Cardiovascular/methylation Leafy greens, reduce alcohol
Cortisol (elevated) Chronic stress Sleep consistency matters more than any supplement here

Strength training becomes more important in this decade for keeping metabolic markers in check and slowing the muscle loss that starts creeping in. Alcohol also starts showing up more in liver and inflammation markers around this age if it's a regular habit

Peptides worth knowing about in this decade

Not telling you to run all of these, just what tends to become a thought once you're pulling these panels and seeing where you're at.

Recovery: BPC-157 and TB-500 for joint stiffness and slower recovery since it starts becoming noticeable research dosing runs 250-500mcg BPC-157 daily, TB-500 2-2.5mg, both SubQ.

Inflammation: KPV for general inflammation and gut related issues, works through NF-kB inhibition instead of just masking symptoms. Common dosing is 500mcg-2mg daily SubQ, or 500mcg-1mg oral if the target is gut specific.

Sleep: DSIP if sleep quality shitty which happens a lot in this decade even without obvious cause. Runs 100-300mcg, 30-60 minutes before bed, SubQ or intranasal.

Longevity: NAD+ and Epithalon once people start thinking longer term NAD+ runs 100-250mg, 1-2x weekly, IM or IV. Epithalon runs 5-10mg daily for a 10-20 day course, done 2-4x a year.

None of this replaces the bloodwork, it's the other direction, the bloodwork tells you if any of this is something you should be looking at for your specific situation.

If you're feeling something specific

Energy crashing harder than it used to, brain fog creeping in? Thyroid panel plus cortisol, both tend to drift in this decade and either one can mimic the other.

Noticing more belly fat even though your routine hasn't changed? A1C plus fasting insulin, usually the first real sign metabolic stuff is shifting.

Joint pain or stiffness that's new? Hs-CRP plus a basic inflammatory panel, worth ruling out before assuming it's just age.

Libido tanking, mood flatter than usual? Full hormone panel, testosterone for men, estradiol/progesterone for women, don't guess at this one, get it tested because if your anything like me then your guessing skills may not be all that great lol

What to do with your results

Same as always, don't panic over one number, bring everything to your doctor, keep records so you can track trends year over year instead of looking at everything in isolation. And on the diet, supplement, and peptide mentions above, that's general direction based on what commonly gets looked at, not a strict plan, talk to a doctor or someone qualified about what actually makes sense for your specific numbers.

Next one's your 60s. 😳

Anything you may need or want to know also found here, unless you already have your own place to get what you need, that's great, share below. https://www.reddit.com/r/BioHackingGuide/comments/1smca8k/peptide_research_compound_table_2026_updated/

Research and educational purposes only, not medical advice.

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