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Motivation & confidence

The drive to start something and the belief that you can do it. It is measured on self-report scales, and it is one of the softer outcomes in this database.

13 supplements analyzed and ranked by clinical evidence.

Supplements13

Supplement Evidence

Phenylalanine
Strong

Low Phe/Tyr: less motivation/confidence

High Phe: worse motivation/confidence

1103 studies·16 benefits
L-Tyrosine
Moderate

Motivation↓, cognition↓

Reward response↓, vigilance↓

Prolactin↑, dopamine↓

3252 studies·11 benefits
Sarcosine
Moderate

Motivation/confidence ↑

Motivation/confidence ↑

38 studies·10 benefits
St. John's Wort
Moderate

Mood improvement +20%

Fewer side effects

97 studies·11 benefits
Caffeine
Moderate

Motivation/confidence +5-15%

Effort & vigilance +1-14%

736 studies·11 benefits
Acetyl-L-Carnitine
Moderate

Depression/mood: better

Fatigue/function: better

90 studies·17 benefits
Theobromine
Weak

Liking + reinforcement

Mental performance + health

294 studies·12 benefits
Citicoline
Weak

Less negative symptoms

Craving ↓, GM ↑

76 studies·14 benefits
Tribulus Terrestris
Weak

Erectile confidence +2.7

Sexual desire, satisfaction

23 studies·9 benefits
Rhodiola Rosea
Weak

Mental work +15%

Strength/endurance +8%

37 studies·15 benefits
NADH
Weak

NAD↑, walk +157m

QoL↑, motivation confidence

157 studies·16 benefits
D-Serine
Weak

Motivation +35.7%

Confidence +3.7

20 studies·10 benefits
Mucuna Pruriens
Weak

Motor/ON gains +25%

QoL/symptoms similar

1 study·9 benefits