Nutritional issues that can be relevant in alcohol recovery

This appendix covers:

1. Medical safety and thiamine where indicated
2. Regular food and adequate nutrition
3. Hydration
4. Correct identified deficiencies
5. Other supplements that are optional and evidence varies

PLEASE NOTE: VITAMINS AND SUPPLEMENTS DO NOT REPLACE MEDICAL ADVICE OR DETOX MEDICATIONS WHERE DEPENDENCE IS PRESENT.

Nothing beats a balanced diet. Also, the assessment and addressing of deficiencies in vitamins and nutrients can be vital. Many people who drink often don’t (or can’t) eat properly. Added to alcohol consumption, this can lead to quicker alcohol-related health problems.

Over time, drinking changes how the body works. It interferes with digestion, drains essential nutrients, disrupts sleep, inflames the gut and liver, and places the nervous system under constant strain. The brain adapts to alcohol just to function. This is why cutting down or stopping often feels harder than people expect. Many of the symptoms people struggle with — anxiety, poor sleep, irritability, shakiness, low mood, brain fog, exhaustion — are not personal failures. They are signs of a body that has been running without what it needs.

This chapter explains how nutrition, vitamins and supplements can help support recovery, making change more tolerable and more sustainable. They are not cures. They are supportive but not necessarily protective. But they may remove unnecessary suffering.

How to use this chapter

This appendix explains some options that may support you and is not a checklist. Some supports are foundational and widely recommended. Others are optional tools that might help certain people into recovery quicker.

The guiding principles are simple:

• Stabilise the body first
• Repair what alcohol has or may have depleted
• Build physical resilience and help heal the body and mind through nutrition

What alcohol does to nutrition (the short version)

Alcohol affects the body in four key ways:

1. It blocks absorption of essential vitamins, especially B vitamins
2. It increases loss of minerals such as magnesium and zinc
3. It damages the gut, affecting mood and immunity
4. It overstimulates the stress and nervous systems

Over time this creates a loop:

Depletion → discomfort → drinking for relief → deeper depletion

Often, nutrition, vitamins and supplements can help interrupt that loop.

Core Nutritional Considerations

Thiamine (Vitamin B1)

Thiamine is essential for brain function. Alcohol dramatically reduces how much thiamine the body absorbs and stores. Severe deficiency can cause permanent brain injury. Thiamine can:

• Protect the brain during withdrawal and early abstinence
• Supports memory, coordination and thinking
• Reduce risk of serious alcohol-related brain conditions

Thiamine supplementation is standard practice all around the world in alcohol treatment guidelines. The appropriate dose and route depend on risk. People at high risk of Wernicke’s encephalopathy may require injected thiamine because tablets may not be absorbed adequately.

B vitamins (B-complex)

B vitamins support energy production, mood regulation and nervous system repair. Alcohol commonly depletes several of them at once. Multi B vitamins can help with:

• Fatigue and emotional flatness
• Irritability and low mood
• Brain fog and poor concentration

These are particularly helpful when cutting down and in early recovery.

Fluids and Electrolytes

Alcohol dehydrates the body and disrupts sodium and potassium balance. This can cause:

• Headaches, dizziness and weakness
• Palpitations and shakiness
• Symptoms often mistaken for cravings

Rehydration and electrolytes are especially important when cutting down and in early abstinence.

Repair and Rebalancing

When alcohol intake drops, the body begins to repair. This stage can be often emotionally unstable and relapse prone. There is some research (some well-evidenced and some emerging) that the following can help support recovery. It may or may not be helpful in some cases.

Magnesium

Magnesium deficiency can occur in people with severe alcohol dependence or malnutrition. Where deficiency is suspected, it should be assessed and corrected appropriately. Routine supplementation is not necessary for everyone.

Omega-3 fatty acids (EPA and DHA)

Omega-3 fatty acids are important nutrients and have been studied in relation to mental and physical health, but they are not an established treatment for AUD. Alcohol increases inflammation and affects brain cell membranes. Omega-3 fatty acids can support:

• Mood regulation
• Stress tolerance
• Emotional steadiness

Gut support (Probiotics and fibre)

Alcohol disrupts gut bacteria and can kill lots of good and bad bacteria, which can influence mood, anxiety and inflammation through the gut–brain connection. Acid reflux and heartburn can be common symptoms of drinking. Probiotics may help gut support and work best alongside regular meals and fibre-rich foods. For more on heartburn, acid reflux and medical support for these, see APPENDIX C.

Zinc

Zinc supports immune function, healing and liver health. Intake is often low in people who drink heavily. It may help with:

• Physical recovery
• Immune function
• General resilience

Other Supplements with Emerging or Limited Evidence

Some supplements are commonly discussed in alcohol recovery despite having much less evidence than established treatments. They are included here for completeness, with the limitations of the evidence made clear. These are adjuncts, not essentials.

Taurine

Taurine is an amino acid involved in several functions in the brain and nervous system. It has attracted research interest in relation to neurological health and alcohol-related effects, but evidence for taurine supplementation specifically in alcohol recovery remains limited.

Glycine and N-acetylcysteine (NAC)

Experimental research indicate these may support sleep, antioxidant pathways and nervous system balance. There is no conclusive evidence.

L-Theanine

Some research studies and emerging ones are suggesting that this may help reduce anxiety and promote sleep quality by helping balance GABA and dopamine neurotransmitters.

L-Glutamine

L-glutamine is an amino acid used throughout the body, including by the gut and immune system. It is sometimes promoted for reducing alcohol or sugar cravings, but there is currently insufficient good-quality evidence to recommend it as a treatment for alcohol cravings or AUD.

Long-term recovery: staying well once alcohol is no longer central

Long-term recovery is not about constant restraint. It is about staying well enough that alcohol no longer feels necessary. Helpful ongoing supports may include:

• B vitamins if diet is inconsistent
• Omega-3 fatty acids
• Vitamin D, especially in low-sunlight months
• Magnesium for sleep and stress tolerance
• Gut-supportive foods

Food matters more than supplements

Supplements work best on top of food, not instead of it. Simple recovery basics:

• Regular meals with protein
• Fibre for gut health
• Fluids throughout the day
• Low-effort, predictable foods during early recovery

Often, eating regularly does more for cravings than any supplement.

Listen To Your Body Not Your Head

Before assuming “I need a drink”, ask yourself:

• Am I dehydrated?
• Have I eaten?
• Do I need to sleep?
• Am I tense, shaky or foggy?

If yes, treat it as a body/biological problem first. Early recovery is not just psychological. It is biological. When the body feels safer and better supported, the mind has space and right conditions to change.