How to Focus Better: Why Your Attention Keeps Slipping (and How to Get It Back)

If you've been wondering how to focus better lately, sitting down to work and finding your mind everywhere but the task in front of you, you're not lacking discipline. There's a specific, well-studied reason your attention keeps slipping, and once you understand it, the fixes get a lot more obvious.

Why can't I concentrate anymore?

Most people don't lose their ability to focus. What changes is how often their attention has to switch tracks.

Think about a slow, single-track stretch: a quiet weekend, a light week, the looser rhythm of summer. Your attention settles, and you can stay with one thing. Then life speeds up. The calendar fills, the threads multiply, and suddenly you're bouncing between a dozen things all day. That's usually the moment the "why can't I concentrate anymore?" feeling shows up. Your focus is fine. What changed is how often your attention has to switch, and every switch carries a hidden cost.

The hidden cost of switching: Attention Residue

That cost has a name. Sophie Leroy, a researcher at the University of Washington, introduced the concept of attention residue in a 2009 study on how people move between tasks. Her finding: when you switch from one task to another, part of your attention stays behind with the first task instead of fully transferring to the new one.

The result is that a piece of your mind is still processing the last thing while you try to do the next, so you have fewer mental resources for the task at hand. Your thinking slows, small mistakes creep in, and everything feels harder than it should. Leroy's research suggests the effect is worst when the previous task was left unfinished, when you were interrupted, or when you're anticipating you'll have to rush back to it later. That describes most modern workdays perfectly, which is why so many of us feel scattered by mid-afternoon.

How to focus better: 4 habits that clear Attention Residue

The encouraging part of the research is that residue responds to how you structure your day. These four habits do most of the work.

1. Batch similar tasks. Group like with like, so you answer email in one block and take calls in another, and your brain isn't constantly re-loading a completely different context. Every context switch is a fresh deposit of residue.
   
   
2. Work one thing at a time, on one surface. One tab, one document, one screen. "Just a quick check" of something unrelated is a micro-switch, and micro-switches leave residue too.
   
   
3. Build a real transition between blocks. Before jumping to the next task, give your attention a moment to disengage from the last one, whether that's a short walk, a breath, or a genuine pause. Leroy's work points to disengaging from the prior task as the key to performing well on the next.
   
   
4. Close your open loops. Residue clings hardest to unfinished work. Even jotting down where you'll pick something back up helps your brain set it down for now.

These habits are the foundation of better focus. There's also a biological layer, the brain chemistry focus actually runs on, where what you feed your brain can play a supporting role.

The brain chemistry behind staying on task

Focus and follow-through are driven largely by two neurotransmitters: dopamine (motivation, the drive to start and stay with something) and norepinephrine (alertness and sustained attention). When these run low, and stress is one of the things that depletes them, focus gets harder to summon and easier to lose.

Your brain doesn't make these from nothing. It builds them from raw materials, and that's where specific nutrients come in.

1. Amino acids: the building blocks of focus

L-tyrosine is the amino acid your body uses as a direct building block to make dopamine and norepinephrine. The most useful thing about it: its benefit shows up most under demanding, high-stress, depleting conditions, exactly when your brain is burning through its focus chemistry fastest. Its real value is replenishing that raw material when stress is drawing it down, right when your focus chemistry needs it most.

L-taurine plays a steadying role, an amino acid that helps regulate and calm the nervous system. Paired with tyrosine, the two balance each other: tyrosine supplies the building blocks for drive and alertness, while taurine helps keep that from tipping into a wired, jittery edge. The result is calm, clear focus.

These are the amino acids behind Attention Chews: support for the task in front of you, without the crash that follows a third coffee.

2. Magnesium: supporting the system focus depends on

Amino acids supply the building blocks. Magnesium supports the environment they work in. It's involved in hundreds of processes across the body, many tied to nervous-system function.

The catch is form. Most magnesium supplements use versions that mainly support muscles and digestion but don't readily reach the brain. Magnesium L-threonate is the exception. It's the form specifically studied for crossing into brain tissue, which is why it's the magnesium in Mood Magnesium.

Its role in focus is more upstream than direct: magnesium helps support the nervous system, healthy stress regulation, and sleep quality, and an over-stressed, under-slept brain struggles to stay on task no matter how much willpower you bring. Amino acids help you engage; magnesium helps keep the system underneath steady enough to sustain it.

The bottom line

If you want to focus better, start with structure: batch your tasks, kill the micro-switches, build real transitions, and close your open loops. That clears the attention residue that quietly wrecks concentration. Then support the biology. Focus runs on neurotransmitters your brain builds from raw materials, and both the amino acids in Attention Chews and brain-available magnesium play supporting roles: tyrosine and taurine for the focus chemistry itself, magnesium for the steady, rested system it depends on.

Clear the residue with your habits. Support the chemistry with what you give your brain. That's how staying on task stops feeling like a fight.

Frequently asked questions

1. Why can't I focus anymore?
   Usually your ability is intact, and what's increased is how often your attention switches between tasks. Each switch leaves "attention residue," a concept from University of Washington researcher Sophie Leroy (2009), where part of your mind stays stuck on the previous task and leaves fewer resources for the current one.
   
   
2. How can I focus better at work?
   Reduce task-switching and give your attention time to transfer. Batch similar work, stay on one screen at a time, take a real pause between task blocks, and note where you'll resume unfinished work so your brain can set it down.
   
   
3. Which nutrients help you focus?
   Focus depends on dopamine and norepinephrine, which your body builds from amino acids like L-tyrosine, with L-taurine helping keep the nervous system steady. Brain-available magnesium (magnesium L-threonate) supports the stress regulation and sleep quality that focus is built on.
   
   
4. Does magnesium help you focus?
   Indirectly, by supporting the nervous system, healthy stress response, and sleep quality a focused brain relies on. Form matters: magnesium L-threonate is the version studied for reaching brain tissue.
   

References

1. Leroy, S. Why is it so hard to do my work? The challenge of attention residue when switching between work tasks. Organizational Behavior and Human Decision Processes (2009), 109(2), 168-181. https://ideas.repec.org/a/eee/jobhdp/v109y2009i2p168-181.html

2. Leroy, S. Attention Residue (researcher's overview). University of Washington Bothell School of Business. https://www.uwb.edu/business/faculty/sophie-leroy/attention-residue

3. Fernstrom, J.D. & Fernstrom, M.H. Tyrosine, phenylalanine, and catecholamine synthesis and function in the brain. Journal of Nutrition (2007). https://pubmed.ncbi.nlm.nih.gov/17513421/

4. Jongkees, B.J., Hommel, B., Kühn, S. & Colzato, L.S. Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands: A review. Journal of Psychiatric Research (2015). https://pubmed.ncbi.nlm.nih.gov/26424423/

5. Wu, J.Y. & Prentice, H. Role of taurine in the central nervous system. Journal of Biomedical Science (2010). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2994408/

6. Effects and Mechanisms of Taurine as a Therapeutic Agent. Biomolecules & Therapeutics (2018). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5933890/

7. Slutsky, I., Abumaria, N., Wu, L.J. et al. Enhancement of learning and memory by elevating brain magnesium. Neuron (2010), 65(2), 165-177. https://pubmed.ncbi.nlm.nih.gov/20152124/

8. Zhang, C., Hu, Q., Li, S. et al. A Magtein, Magnesium L-Threonate, -Based Formula Improves Brain Cognitive Functions in Healthy Chinese Adults. Nutrients (2022), 14(24), 5235. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9786204/

9. de Baaij, J.H.F., Hoenderop, J.G.J. & Bindels, R.J.M. Magnesium in Man: Implications for Health and Disease. Physiological Reviews (2015), 95(1), 1-46. https://journals.physiology.org/doi/full/10.1152/physrev.00012.2014

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for educational purposes and is not medical advice.