Phew the kids are off to bed, and finally you get a chance to catch your breath and….have a glass of wine to help you wind down. As we start to relax and let the week go, alcohol is acting as a central nervous system depressant temporarily altering your mood slowing your brains activity and chemical messaging. Kick off your slippers, sink deeper into the sofa and you’ve experienced a temporary lift in mood with the dopamine release in the brain’s reward pathways. Yes, you deserve this you feel, and you probably do after the week you’ve had.
Unfortunately the high is short-lived, but you know this, as blood alcohol levels fall, many people experience rebound effects, why are you suddenly feeling so sad, and emotional about everything…its time for bed you think.
Alcohol has a biphasic and often disruptive effect on blood sugar, which if it’s not stable is liable to now disrupt your sleep. The liver prioritises metabolising alcohol over its normal job of releasing stored glucose to maintain steady blood sugar, the intake of alcohol cause an initial spike in blood glucose from the carbohydrate load. After that, the hypoglycaemic effect of the alcohol itself may dominate. Effects can linger for many hours well into the next day.
Alcohol interferes with nutrient absorption, utilisation, and storage in several ways. It damages the intestinal lining, increases urinary losses of certain minerals, prioritises its own metabolism using up B vitamins, and often displaces nutrient-dense foods in the diet.
Common deficiencies linked to regular or heavy drinking include:
- B vitamins (especially thiamine/B1, folate/B9, B6, B12, riboflavin)
- Fat-soluble vitamins A, D, E, and K
- Minerals such as zinc, magnesium, and sometimes selenium or calcium
Thiamine deficiency is particularly well-known and can contribute to neurological problems. Poor nutrient status further impairs energy production, mood regulation, immune function, and tissue repair, now you have every cold that your kids are bringing home, you need a glass of wine each night to relax, creating a cycle that worsens the overall impact of alcohol.
Alcohol and its metabolite acetaldehyde directly damages the intestinal barrier. It disrupts tight junction proteins that seal the spaces between gut cells, increases intestinal permeability, and can cause inflammation and cell damage in the mucosa. Even a single binge can temporarily weaken the barrier, allowing bacterial products to enter the bloodstream and trigger systemic inflammation.
Chronic exposure promotes imbalance in gut bacteria, further erodes barrier function, and contributes to ongoing low-grade inflammation that affects the liver, brain, and immune system. This gut-liver-brain axis is one pathway linking alcohol to both physical and emotional symptoms.
Alcohol’s status as an emotional depressant is not just a label, it reflects real, measurable interference with the systems that keep mood, energy, and physiological balance stable. The combination of neurotransmitter disruption, blood sugar swings, nutrient depletion, and gut barrier damage creates a cascade that can leave people feeling worse after the initial effects wear off, and progressively more vulnerable with repeated use.
