The best supplements for exam season include omega-3 fatty acids, vitamin D, vitamin B12 and magnesium, which support brain function, energy levels and stress management.

Every year before exam season, I get the same question from parents and students alike: “What supplements should I be taking - or giving my children - to help with performance?”

Exams are demanding, and when stress, long study hours, and disrupted routines kick in, it’s natural to look for something to help you put your best
foot forward.

Here’s what I always recommend:

Omega-3 Fatty Acids

If fish isn’t regularly on the menu (aim for 2–3 portions per week), omega-3 supplementation is top of the list.

These essential fats play a key role in brain function and cognitive health, which is exactly what you want during periods of intense study and long exams.

Shop here: https://supplementsmadesimple.ie/products/omega-3

Vitamin D

Exam season often means long days indoors, limited daylight, and very little sun exposure - particularly in Ireland. That puts students at risk of low vitamin D levels. 

Supplementation can help support the immune system, and that matters more than people think. The last thing anyone needs in the middle of exams is a cough, cold, or flu knocking them off track.

Shop here: https://supplementsmadesimple.ie/products/vitamin-d-60-capsules

Vitamin B12

Fatigue is one of the biggest barriers to effective studying. Vitamin B12 helps reduce tiredness and supports red blood cell formation.

It’s particularly important for those with lower intake of animal products like red meat or poultry, as these are the primary dietary sources.

Shop here: https://supplementsmadesimple.ie/products/vitamin-b12-spray

Magnesium

Often overlooked, but very relevant. Magnesium supports normal psychological function and can help with stress regulation - something most students are dealing with, whether they admit it or not.

Shop here: https://supplementsmadesimple.ie/products/magnesium

That said, supplements are just one piece of the puzzle…

Sleep

This is non-negotiable. “All-nighters” are counterproductive. Memory consolidation - the process of actually storing what you’ve learned - happens during sleep.

There’s a point in the evening where more studying stops being useful and sleep becomes far more valuable. I’ve never pulled an all nighter in my life. 

It’s never worth it. Get at least 6-8 hours sleep to rest your mind and retain what you’ve learned.

Regular Breaks

The brain isn’t designed for nonstop cramming. Short, structured breaks improve focus, productivity, and retention.

Fresh Air and Movement

Even a short walk can reset concentration and reduce stress hormone cortisol.It doesn’t need to be complicated - just consistent. Get outside, stretch the legs- you’ll feel all the better for it.

Balance

This is the one people resist the most. Seeing friends, keeping up hobbies, stepping away from the desk - it all feels like lost time, but it’s not. It supports long-term performance and prevents burnout. Exam season is a marathon, not a sprint. 

I hope some of these tips are useful. And good luck!

Dr. Doireann O'Leary
Founder, Supplements Made Simple

 

FAQ

What supplements help with exam performance?

Omega-3 fatty acids, vitamin D, vitamin B12, and magnesium are commonly recommended to support brain function, energy levels, and stress management during exams.

Why is vitamin D important during exam season?

Limited sunlight exposure during exam periods can lead to low vitamin D levels, which may impact immune health.

Can magnesium help with exam stress?

Magnesium supports normal psychological function and may help regulate stress levels.