Quit alcohol: what your body does when you stop

The absence of artificial dopamine bursts is felt; D2 receptors go into rest to raise their sensitivity, and anhedonia may occur.

The last acetaldehyde residues in tissue and fat cells are also destroyed; the acute biological cleanup ends.

The AST and ALT enzyme levels leaking into the blood drop dramatically and enter the healthy reference range.

BDNF secretion rises; the brain's speed at building new neural pathways and changing habits increases.

The internal painkiller and mood-regulating endorphins alcohol suppressed settle to normal; the pain threshold improves.

The gray-matter density in the decision-making and impulse-control center increases.

With melatonin/serotonin balance, sleep architecture normalizes.

The triggered triglyceride and VLDL (bad fat) levels fall; the lipid panel recedes to healthy limits.

Alcohol's toxic effect on the heart muscle fibers (cardiomyopathy) stops; contractile strength increases.

The thyroid axis (T3, T4) returns to normal; basal metabolism and fat burning fall into order.

The toxicity in the prefrontal lobe ends; verbal fluency, word recall, and short-term memory increase.

Serotonin transporter protein synthesis returns to normal; the alcohol-driven depressive mood lifts.

New neuron production in the hippocampus peaks; recording new memories and mental flexibility strengthen.

IgA antibody production in the mucosa falls into order; the local protection of the respiratory and digestive systems normalizes.

The balance between the excitatory (glutamate) and calming (GABA) systems largely recovers; deep sleep clearly improves.

Damaged red blood cells die within 120 days; young cells born in an alcohol-free environment take their place, and oxygen capacity peaks.

The vessel walls smooth out; HDL (good cholesterol) reaches ideal, and intravascular inflammation stops.

Alcohol-related fatty liver (steatosis) usually reverses to a large degree; if there is no permanent fibrosis or damage, the lobules approach their healthy architecture. In advanced damage, recovery may be limited.

The frontal and temporal cortex gray matter that alcohol shrank returns almost to its former healthy size.

The numbness and tingling that toxicity and vitamin B deficiency caused in the peripheral nerves largely recede; the degree of recovery varies with the duration of damage and with nutrition.

Alcohol's metabolite acetaldehyde is a DNA-damaging substance (alcohol is an IARC Group 1 carcinogen); with exposure stopped, the buildup of new cellular damage halts and room opens up for repair mechanisms.

The suppression of the bone marrow lifts; white blood cells and natural killer (NK) cells are produced at full capacity.

Once alcohol stops, the acute inflammation in the pancreas recedes and the risk of a new attack drops markedly. In chronic pancreatitis, permanent damage may remain; even so, the risk decreases.

With blood pressure, lipids, and the endothelium improving, the risk of stroke and coronary heart attack approaches that of a non-drinker.

Mental skills, attention span, and analytical problem-solving capacity largely recover. The degree of recovery varies with usage history.

With alcohol-related acetaldehyde exposure stopped, the risk of cancers such as those of the mouth, throat, esophagus, and liver recedes markedly over time. The size of the reduction varies with the cancer type and usage history.

With acetaldehyde and free radicals cleared from the digestive epithelium and bladder, these cancer risks recede toward those of a non-drinker.

With long-term abstinence, the liver largely recovers and the risk of cirrhosis and pancreatitis recedes markedly. If cirrhosis has already developed, the damage may be permanent; even so, progression halts.

With the mucosal cells of the esophagus and larynx largely repaired, these cancer risks approach a non-drinker's level.

Organ health and cellular repair largely normalize; life expectancy approaches that of someone who never drank. The remaining gap varies with usage history.