Distraction and cognitive overload affect millions of people every day. Many people stay busy all day but struggle to stay focused on the tasks that matter most.

gentle’s focus protocol uses tRNS (transcranial random noise stimulation) to help the brain enter a state that supports sustained attention, learning, and mental endurance.

Instead of forcing focus through stimulants or stress, the protocol works with the brain’s natural learning mechanisms to make concentration feel more stable and effortless.

Protocol

We recommend using the focus protocol before starting a block of deep work, studying, or creative tasks.

The goal is simple: create the mental conditions where sustained focus becomes easier.

Evidence and Research

Researchers have studied tRNS across a wide range of cognitive tasks including attention, learning, creativity, and executive function. Several studies show that mild random stimulation applied to frontal brain regions can improve cognitive performance during demanding tasks.

• Effortless Concentration
  
  Participants receiving tRNS during attention tasks were able to maintain focus longer and ignore distractions more effectively compared to control groups [1][4].
  These results suggest that tRNS may enhance the brain’s ability to filter noise and prioritize relevant signals during cognitive work.

  
  

• Faster Learning and Skill Acquisition
  
  In one well-known study from University College London, participants who received brain stimulation during math training learned faster and retained those gains for up to six months [2].

  
  

• Better Mental Endurance
  
  Research has also shown improvements in working memory, impulse control, and executive function when mild stimulation is applied to prefrontal brain regions [1][4].
  Participants made fewer errors and were able to sustain cognitive performance for longer periods.

  
  

Together, these findings suggest that tRNS can support attention networks in the brain and improve the ability to maintain consistent cognitive performance during demanding work.

The Science Behind Better Focus

Transcranial Random Noise Stimulation (tRNS) is a non-invasive brain stimulation technique that delivers a low-intensity electrical signal composed of randomly varying frequencies [4].

Research suggests tRNS can increase cortical excitability and plasticity, which may make neural networks more responsive during learning and attention-heavy tasks [4].

One explanation for this effect is stochastic resonance, where adding a small amount of noise can help a system detect and transmit weak signals more effectively [4].

Because of this, tRNS appears particularly useful during learning, training, and sustained attention [1].

Safety, Realistic Expectations, and Personalization

It is important to stay realistic about what brain stimulation can and cannot do.

tRNS is not a shortcut to unlimited intelligence or instant mastery. Instead, it works best when paired with active learning or focused work, where the brain already has the opportunity to improve.

Across more than a thousand stimulation sessions in research studies, no serious adverse effects have been reported. Most sessions produce either no sensation or only mild skin tingling under the electrodes.

Typical research protocols use currents between 1–2 mA for about 10–20 minutes, which are well tolerated by participants.

At the same time, every brain is different. The stimulation that improves focus for one person may not be identical for another.

Research shows meaningful variability in how individuals respond to brain stimulation, particularly in the neural networks involved in attention and learning.

gentle is designed to move toward personalized cognitive support. Over time, stimulation protocols can be refined based on user response, helping each person find the parameters that best support their own focus and productivity.

The long-term vision is simple: a system that helps you enter the right mental state when you need it, whether that means deep concentration during the day or relaxation and sleep at night.

Papers Referenced

1. Nejati, V. et al. (2024). Scientific Reports, 14, 7600. Simultaneous tRNS to prefrontal regions improved ongoing inhibition, working memory, and decision-making in children with ADHD compared to sham (no stimulation) .

2. News-Medical (2022). Study investigates the effect of tRNS in a variety of settings. Dr. O. van der Groen explains that adding tRNS during learning led to faster learning and better attention, by enhancing neuroplasticity (forming new neural connections) .

3. Peña, J. et al. (2019). Scientific Reports, 9, 7116. 20-minute sessions of tRNS (1.5 mA, 100–500 Hz) over left DLPFC significantly improved verbal creative thinking (fluency, originality) versus sham stimulation .

4. UCL News (2013). Brain training and stimulation improves mental arithmetic ability. Five days of tRNS with cognitive training produced long-lasting improvements in mental arithmetic, with effects still evident 6 months later .

5. Battisti, A. et al. (2025). Scientific Reports, 15, 4560. Safety/tolerability of 1,032 tES sessions in youth: No moderate or severe adverse events; ~77% of sessions had no side effects (only mild itching in some sessions), affirming the safe profile of tRNS when used 10–20 min at 1–2 mA .

6. Wikipedia. Transcranial random noise stimulation. General overview of tRNS as a non-invasive brain stimulation using random-frequency currents; notes that higher frequencies (100–640 Hz) boost cortical excitability and that tRNS is more comfortable than tDCS due to easier blinding (less sensory detectability) .

7. News-Medical (2022). Study investigates the effect of tRNS in a variety of settings. Discussion of realistic expectations: tRNS likely won’t elevate a person beyond their peak inherent ability (no “Limitless” effect), but is most useful for those with room to improve or learning new skills