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Caffeine and L-Tyrosine: study protocols

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

Caffeine: what the research found →

Dose per serving from research: Caffeine

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 doseStudy groups
50 mg or less
1
50 mg to 100 mg
0
100 mg to 250 mg
1
250 mg to 500 mg
4

Dose per serving from research: L-Tyrosine

5 study groups in 3 studies say how much L-Tyrosine participants took a day.

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

Most common: 250 mg to 500 mg, 100% of 5 study groups.

Daily doseStudy groups
250 mg to 500 mg
5

Commonly used together

7 of 7 study groups took Caffeine and L-Tyrosine with something else. Shown: what 3 or more different studies gave.

What was given together, not what works together.

Taken withStudy groups
Beta-Alanine
5

7 study groups

Study
Effects of acute caffeine, theanine and tyrosine supplementation on mental and physical performance in athletes
2019 · SUP (supplement condition) · Male athletes aged 18–25 years; healthy and disease-free, current or former collegiate athletes, and regular caffeine consumers
1 mg/kg—1 day20
Cognitive and Mood Effects of a Nutrient Enriched Breakfast Bar in Healthy Adults: A Randomised, Double-Blind, Placebo-Controlled, Parallel Groups Study
2017 · nutrient enriched · Healthy adults aged 21–40 years
21.5 mg279 mg8 weeks48
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 mg300 mg8 weeks27
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 mg300 mg8 weeks26
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 mg300 mg1 day25
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 mg300 mg1 day25
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—1 day24
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