Caffeine, L-Tyrosine and Beta-Alanine: study protocols

5 study groups took Caffeine together with L-Tyrosine and Beta-Alanine. These are the doses the studies gave. They are not a recommendation.

Dose per serving from research: Caffeine

5 study groups in 3 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, 80% of 5 study groups.

Daily dose	Study groups
100 mg to 250 mg	1
250 mg to 500 mg	4

5 study groups in 3 studies say how much Beta-Alanine participants took a day.

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

Most common: 2.5 g to 5 g, 80% of 5 study groups.

Daily dose	Study groups
1 g to 2.5 g	1
2.5 g to 5 g	4

5 of 5 study groups took Caffeine, L-Tyrosine and Beta-Alanine with something else, but nothing that 3 or more different studies gave.

5 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	284 mg	300 mg	3 g	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	284 mg	300 mg	3 g	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	284 mg	300 mg	3 g	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	284 mg	300 mg	3 g	1 day	25
Acute Effect of Caffeine-Based Multi-Ingredient Supplement on Reactive Agility and Jump Height in Recreational Handball Players 2022 · multi-ingredient supplement (MS) · Recreationally trained male handball players; mean age 23.8 ± 1.4 years; healthy	200 mg	—	2 g	1 day	24