Read the research for yourself.

Four weeks at 200 mg a day left healthy adults scoring lower on stress-related symptoms, rating their sleep better, and doing better on a verbal fluency task.

A meta-analysis showing faster visual processing and recognition (a narrow, specific cognitive benefit).

Across 19 papers covering 897 people, L-theanine left them rating their sleep better and struggling less the next day.

Over 28 days at 400 mg a day, adults under moderate stress reported less stress than placebo. Daily Calm Focus provides 200 mg. Cortisol measured across the same stretch did not differ.

A single 200 mg dose, and an hour later the cortisol response was lower, with more alpha-wave activity alongside it. Sixteen adults.

A systematic review concluding 200 to 400 mg per day may support a healthy stress response in stress-exposed people.

An fMRI companion study showing sharper target-specific attention and less mind-wandering.

At 200 mg, improved recognition and attention on a reaction-time task, with or without caffeine.

200 mg in a nutrient drink lowered self-rated stress within an hour, and the cortisol response differed by three hours.

At 200 mg, reduced tension and supported a calmer response to an acute stressor in high responders.

Increased calm alpha-wave activity in the brain versus placebo.

At 200 mg, blunted the heart-rate and stress-marker response to an acute stressor.

At 200 mg, improved a self-rated tranquil-versus-troubled state at rest.

The foundational 200 mg study showing increased alpha-wave generation, most pronounced in people prone to everyday tension.

Over about a month, 215 men on a B-complex with vitamin C and minerals reported less stress and more vigor, and held up better on demanding mental tasks. That formulation is not the one in Daily Calm Focus.

Over 12 weeks, older adults on a multivitamin stayed stressed for less time after a stressor. The mood results split by sex: less emotional loneliness in men, more friendliness in women.

Used the same active coenzyme forms we do (P-5-P and methylcobalamin) in a genotype-tailored trial.

After 28 days on a B-complex, people lasted longer in an exercise test and finished with less lactate and ammonia in the blood.

Pooling the B-vitamin trials, stress scores came out lower than placebo. Depression and anxiety scores did not move.

Six months of a high-dose B multivitamin raised B-vitamin status and lowered homocysteine, and changed how oxidative stress markers related to brain energy metabolism.

Across 27,882 people, B vitamins made little or no difference to general cognition.

Across 8 trials of 28 days or longer, people taking vitamins and minerals reported less stress, less fatigue, and less confusion. Depression scores did not change.

Adults under work stress reported less personal strain and less confusion after 12 weeks on a high-dose B-complex. Other mood measures did not move.