Niacin and Caffeine: study protocols

6 study groups took Niacin together with Caffeine. These are the doses the studies gave. They are not a recommendation.

Dose per serving from research: Niacin

6 study groups in 4 studies say how much Niacin participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 50 mg to 100 mg, 83% of 6 study groups.

Daily dose	Study groups
25 mg to 50 mg	1
50 mg to 100 mg	5

6 study groups in 4 studies say how much Caffeine participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 250 mg to 500 mg, 67% of 6 study groups.

Daily dose	Study groups
100 mg to 250 mg	2
250 mg to 500 mg	4

6 of 6 study groups took Niacin and Caffeine with something else. Shown: what 3 or more different studies gave.

What was given together, not what works together.

6 study groups

Study
Effects of ingesting a pre-workout dietary supplement with and without synephrine for 8 weeks on training adaptations in resistance-trained males 2017 · PWS · Apparently healthy, resistance-trained males; mean age about 21 years	60 mg	284 mg	8 weeks	27
Effects of ingesting a pre-workout dietary supplement with and without synephrine for 8 weeks on training adaptations in resistance-trained males 2017 · PWS + S · Apparently healthy, resistance-trained males; mean age about 22 years	60 mg	284 mg	8 weeks	26
Effects of acute ingestion of a pre-workout dietary supplement with and without p-synephrine on resting energy expenditure, cognitive function and exercise performance 2017 · PWS · Resistance-trained healthy adults; 20 men and 5 women, mean age 21.7 years	60 mg	284 mg	1 day	25
Effects of acute ingestion of a pre-workout dietary supplement with and without p-synephrine on resting energy expenditure, cognitive function and exercise performance 2017 · PWS + S · Resistance-trained healthy adults; 20 men and 5 women, mean age 21.7 years	60 mg	284 mg	1 day	25
Short-Term Effects of a Ready-to-Drink Pre-Workout Beverage on Exercise Performance and Recovery 2017 · RTD · Recreationally active men and women aged 18–40 years with at least six months of resistance-training experience	65 mg	200 mg	7 days	25
Improved cycling time-trial performance after ingestion of a caffeine energy drink 2009 · Red Bull Energy Drink · Trained male and female cyclists; mean age 27.3 years	40 mg	160 mg	1 day	12