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Beneath the buzz.

Alcohol is in the same carcinogen class as asbestos. We drink it to celebrate, to unwind, to get through the week. But we rarely look at its impact on our biology.

  1. 01Cancer
  2. 02Brain
  3. 03Heart
  4. 04Lungs
  5. 05Liver
  6. 06Gut
  7. 07Pancreas
  8. 08Hormones
  9. 09Blood
  10. 10Sleep
  11. 11Mood
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Cancer

Yes, alcohol causes cancer.

Not only heavy drinking, and not only the liver. Your body turns every drink into acetaldehyde, a chemical that damages DNA in the cells it reaches. Mouth, throat, voice box, esophagus, liver, colon, breast. Expensive wine carries the same carcinogen as cheap vodka.

In the US, alcohol causes about 100,000 cancer cases and 20,000 cancer deaths every year. Fewer than half of Americans know it’s a cause. 

No routine blood test screens for these cancers. Blueprint tracks the liver doing the converting and the inflammation around it.

  • GGT
  • ALT
  • AST
  • hs-CRP

Brain

Alcohol is a neurotoxin.

That means it damages brain cells. In the moment, it quiets the part of your brain that works the brakes, so bad ideas start sounding better. Over years, your brain loses tissue, especially in the areas that handle memory and self-control. That damage is linked to lasting depression and anxiety, and a higher risk of dementia.

Going from half a drink to one drink a day matched about two extra years of brain aging by 50, in brain scans of 36,678 adults. 

Blueprint measures:

  • Vitamin B12
  • Folate
  • RBC magnesium
  • Homocysteine

Heart

Every drink asks more of your heart.

A drink speeds up your heart, and it stays fast into the night, so you wake with your pulse in your ears. Drink most days and your blood pressure starts to climb. Heavy drinking raises triglycerides and cholesterol, blood fats that raise your risk of heart disease, heart attack and stroke. The rhythm can slip out of time, a flutter called atrial fibrillation. Over years, it can weaken the heart muscle itself.

About one drink a day came with a 16% higher risk of atrial fibrillation, an irregular heartbeat that raises stroke risk, in 107,845 people followed for 14 years. 

Blueprint measures:

  • ApoB
  • LDL cholesterol
  • HDL cholesterol
  • Triglycerides
  • hs-CRP

Lungs

Your lungs lose their defenses.

The cold that turns into a chest infection. The cough that hangs on for weeks. Alcohol weakens the tiny hairs that sweep your airways clean and the immune cells that guard them, so germs that should be cleared settle in. At night it relaxes your throat, which makes snoring and sleep apnea worse.

About four drinks a day raised the risk of pneumonia by a third. About eight a day raised it by three quarters. 

Blueprint measures:

  • WBC
  • NLR
  • hs-CRP

Liver

Your liver puts alcohol first.

Your body can’t store alcohol, so your liver clears it before anything else. Burning fat waits. Drink often and that fat builds up in the liver, then inflammation, then scarring that slowly takes the place of healthy tissue. None of it hurts until it’s advanced.

Fat builds up in the liver of 95–100% of people who drink heavily. 

Blueprint measures:

  • GGT
  • ALT
  • AST
  • AST:ALT ratio
  • FIB-4
  • Total bilirubin
  • Albumin

Gut

Your gut is taking the hit.

The heartburn. The nausea. The urgent morning bathroom trip. Alcohol irritates your stomach and loosens your gut lining, the thin wall that keeps the bacteria living in your gut out of your bloodstream. Once it loosens, their toxins slip through and travel to your liver, adding to the inflammation there.

Within 30 minutes of a single binge, bacterial toxins from the gut were already rising in the blood of healthy adults. 

Blueprint measures:

  • hs-CRP
  • Zinc
  • Albumin
  • ALT
  • AST

Pancreas

Alcohol works against your insulin.

Your pancreas makes insulin, the hormone that moves sugar out of your blood and into your cells. Drinking regularly can make your body less responsive to insulin, so your pancreas has to work harder to keep your blood sugar steady. That’s how type 2 diabetes starts. Heavy drinking can also inflame the pancreas itself and leave lasting damage.

After one month without alcohol, insulin resistance fell by about a quarter in people who drank moderately to heavily. 

Blueprint measures:

  • Fasting insulin
  • Fasting glucose
  • HbA1c
  • HOMA-IR
  • Triglycerides

Hormones

The effects reach your sex life, too.

Lower drive. Erections that don’t hold. Cycles that go irregular. Moods that swing for no clear reason. Alcohol scrambles the signals between your brain and your sex organs. In men it pulls testosterone down. In women it pushes estrogen up, which also raises breast cancer risk.

In a controlled study, about three drinks a day for three weeks cut men’s testosterone 7%. In another, two drinks a day raised women’s estradiol 28%. 

Blueprint measures:

  • Total testosterone
  • Free testosterone
  • SHBG
  • Estradiol
  • Progesterone (women)
  • FSH and LH (women)

Blood

Alcohol changes your blood itself.

Heavy drinking reaches your bone marrow, where blood is made. Red blood cells come out oversized and can run short, so less oxygen gets where it’s needed. Platelets, the cells that stop bleeding, drop. White blood cells, your defense against infection, get slower to respond. You feel it as tiredness that rest doesn’t fix, bruises you can’t explain and colds that hang on longer than they should.

In people who drink heavily for years, about half have oversized red blood cells. 

Blueprint measures:

  • Hemoglobin
  • MCV
  • Platelets
  • WBC
  • Folate
  • Vitamin B12

Sleep

Eight hours in bed. Still wrecked.

You fall asleep fast and give the drink the credit. Then 3 a.m. You wake up hot, heart racing, mind already running, and the rest of the night is shallow. Alcohol cuts into REM, the sleep that sorts your memories and steadies your mood, so you wake up tired, foggy and on edge.

In the first hours of sleep, about one drink took 9 minutes of every 100 away from the body’s recovery. A heavy night took 39. Heart monitors on 4,098 people showed it. 

Blueprint measures:

  • Fasting glucose
  • hs-CRP
  • RBC magnesium

Mood

Alcohol borrows calm from tomorrow.

A drink quiets your nervous system for a few hours. Then it swings back the other way, and after a broken night you wake anxious, flat and on edge. When drinking becomes a habit, that dip can stop lifting by lunchtime and start to feel like your normal. And a drink to take the edge off starts it all again.

Across 22 studies and 6,152 people, people felt more anxious, stressed and low when they were hungover than when they were sober. 

Blueprint measures:

  • TSH
  • Free T3
  • Free T4
  • Vitamin D
  • Vitamin B12
  • Folate

The loop

Bad days feed each other. So do good ones.

The loop

Bad days feed each other. So do good ones.

6:30 p.m.

A drink takes the edge off. The night shrinks to the couch.

If you drink heavily every day, talk to a doctor before you stop. Withdrawal can be dangerous.

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