When you’re deep into a 3-day festival or soaking up the sunshine and nightlife on your Mediterranean getaway, the drinks can flow easily. Unfortunately, then comes the inevitable aftermath, as your body drags you back down to earth with a bout of hangxiety and a pounding headache for the trip home.
We’re not here to wag our fingers at anyone, but it’s worth knowing what’s going on inside your body and what can actually help. We’re taking a look at the impact of drinking on your nutrition, gut, blood sugar, sleep, and hormones so you can make the right decisions for your body.
How your body processes alcohol
It’s your liver’s job to process alcohol, and as it cannot be stored, it becomes your body’s number one priority. It’s treated like a toxin, so other bodily processes, like blood sugar regulation, nutrient absorption, and tissue repair, get pushed right down the to-do list.
That’s why the more consecutive days you drink, the harder recovery gets. Your body is continually diverting resources away from the functions that make you feel energised and balanced.
It’s worth knowing that, on average, women tend to have lower body water levels than men. So alcohol will be distributed in a smaller volume, meaning the same amount of alcohol can result in a higher blood alcohol concentration than in a man of similar body weight.
The nutrients drinking depletes
Alcohol acts as a diuretic, increasing urine production so your body loses more fluid than normal. But alongside water, electrolytes and vitamins can also be lost. The most affected tend to be:
- B-vitamins: Especially B1, B6, B12. These vitamins play a big role in energy production and cognitive function, so depletion often shows up as fatigue, poor concentration and brain fog.
- Magnesium and Zinc: Essential minerals that contribute to normal muscle function and the sleep cycle. Low levels may result in poor sleep, anxiety, or muscle tension.
- Electrolytes: Sodium and potassium are essential for hydration, and losses through alcohol consumption can contribute to headaches, dizziness and weakness.
- Vitamin C: As a water soluble vitamin, drinking can cause you to excrete it faster potentially contributing to a rundown feeling and slower recovery.
Gut and blood sugar
Alcohol can increase intestinal permeability, also known as “leaky gut”. What this means is the gut barrier is less effective, and can let in more inflammatory compounds leading to systemic inflammation and lower nutrient absorption.
Drinking alcohol can also hit the gut microbiome, reducing the beneficial bacteria while less favourable bacteria may increase. The gut is sometimes called our second brain for its role in mood regulation, appetite control, and immune function. When the microbiome is disrupted, it can contribute to brain fog, low mood, cravings and digestive discomfort.
Also, because your liver is busy metabolising alcohol and flushing it from your system, many of its usual functions end up taking a back seat. That includes stabilising blood glucose levels between meals, which is why you can end up with energy crashes, an irritable mood, and increased hunger. The more days you drink, the more these effects start to pile up.
Sleep and hormones
There’s a common misconception that because alcohol can sometimes get you to sleep faster, it is good for sleep quality. But falling asleep and getting good quality shut-eye are not the same thing. Alcohol is known to reduce REM sleep, which is vital for brain function and emotional regulation, and can also increase night-time waking. So even though you can spend the usual amount of time sleeping after drinking alcohol, you may wake up feeling far less refreshed.
As sleep also plays an essential role in appetite regulation, blood sugar control, immune function, and muscle repair, poor sleep quality can also affect your body’s ability to recover. Alcohol also interferes with the HPA axis, your stress response system, which increases cortisol levels. This disruption is responsible for the unpleasant feelings of “hangxiety” that can creep in the next day.
Oestrogen metabolism can also be affected, as alcohol has been shown to increase circulating oestrogen levels. As hormone signalling is altered, your mood and energy levels can suffer. This can be particularly noticeable during perimenopause and menopause, when hormonal fluctuations are already influencing physical resilience.
What actually helps with recovery
Here’s what can actually make a difference in counteracting the effects of alcohol and recovering after drinking.
Before
Aim for a meal that’s rich in protein, fibre and healthy fats so your body is well fuelled before you even start drinking. Make sure you drink plenty of fluids too, so you don’t go into it already dehydrated.
During
Keep eating regularly. If you’re drinking throughout the day and evening, make sure you don’t skip any meals. Hydrate with more than just water. Electrolytes, which can come in handy sachets to keep in your bag, can help replenish sodium and potassium lost through drinking.
After
Your stomach might feel worse for wear the next day, but refuelling is important. Keep it simple with foods like fruit (particularly any high in vitamin C), oats, and yoghurt. Consider taking a B-vitamin complex to restore what may have been lost. NAC (N-acetylcysteine) has gained popularity as a post-alcohol supplement, as it contributes to glutathione production, one of the body’s most important antioxidant defence systems. Some people also like to take milk thistle, which has been traditionally used to support liver function.
Recovery isn’t just about hydration
There’s a lot going on in your body when you drink alcohol, and the effects become particularly noticeable when drinking stretches across several days, as disrupted sleep, nutrient depletion, blood sugar fluctuations and dehydration begin to stack on top of one another. Water intake is essential, but you can support your body further with careful nutrition and plenty of rest. You don’t have to beat yourself up about drinking, but understanding what’s happening inside your body can help you make better choices around nutrition, recovery, and looking after yourself when you do.
