So many of us have tried the speed like drugs, and found the high useful and pleasurable. However, the illegality, expense and health effects deter, rightly, most people from relying on these drugs too often. Upon ingesting 1/4-1/3 or so of a teaspoon (~600mg-1200mg) of tyrosine powder, an almost immediate 'up' comes.
L-Tyrosine
Limited data
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 2 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- toxicity data (PsychonautWiki, PubChem)
- dose data not in PW/TripSit (unverifiable)
- dose ladder unverifiable and undisclosed — capped
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 2 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- toxicity data (PsychonautWiki, PubChem)
- dose data not in PW/TripSit (unverifiable)
- dose ladder unverifiable and undisclosed — capped
Aliases: L-tyr, Tyrosine, 4-hydroxyphenylalanine
Summary
Tyrosine (also known as L-Tyrosine and 4-hydroxyphenylalanine) is a non-essential amino acid that serves a precursor to dopamine, adrenaline and norepinephrine in the human body. As a supplement, it is reported to act as a mild stimulant. It is also one of the 22 amino acids that are used by cells to synthesize proteins and is abundant in many high-protein foods, such as chicken, turkey, fish, cottage cheese, cheese, yogurt, almonds, milk, avocados, bananas, peanuts, pumpkin seeds, sesame seeds and soy products.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 500-1000mg | 1000-2000mg | 2000-3000mg | 3000mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Peak | Offset | Total |
|---|---|---|---|---|
| Oral | 30-90 min | 1-3 hrs | 1-2 hrs | 2.5-6.5 hrs |
Effect Profile
14 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Stimulant
7.4
Strong+
7/10
Strong focus with moderate stimulation, mild euphoria, low anxiety/jitters
Stimulation / Energy
×3
7
stimulation
stamina enhancement
wakefulness
Euphoria / Mood Lift
×2
5
cognitive euphoria
motivation enhancement
Focus / Productivity
×2
10
focus enhancement
analysis enhancement
memory enhancement
motivation enhancement
thought acceleration
Anxiety / Jitters
×1
2
increased heart rate
Based on reports from:
Import into PsychonautWiki Journal
The PsychonautWiki Journal app includes L-Tyrosine, but its built-in data can be thinner than ours. Importing this file adds a separate "L-Tyrosine (Substance Search)" custom substance with our dose ranges, durations and tolerance, so you can log against whichever you prefer.
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Import this file as custom substances
and you get "L-Tyrosine (Substance Search)" with every
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Android (v15+); the format is confirmed by the app's
developer.
Ranges are harm-reduction guidance, not a prescription.
Tolerance
Build-up
after repeated and frequent usage
Reset
14 days
Tolerance Decay
Full tolerance
1h
Half tolerance
10d
Baseline
~14d
Acute tolerance: develops within a single session — the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.
Effects
Aggregated from 14 Erowid experience reports
Positive Effects 3
Stimulation
78.6%
70%
Focus Enhancement
42.9%
70%
Tactile Enhancement
21.4%
70%
Adverse Effects 2
Anxiety
28.6%
70%
Increased Heart Rate
28.6%
70%
Community Trip Reports
Anecdotal first-person accounts from Reddit, Erowid, and Bluelight. Click a source to expand. Reports are harm-reduction context, not medical guidance. Tags summarise each author's own verdict — how reports are classified.
Erowid 5 reports 4 neutral 1 cautionary visit
I bought a bottle of Tyrosine, 100 pills of 500mg each, for about $15. Here are the three experiences Experience one: at 500mg I took one pill to test out the strength of the dosage, then went and worked out with my usual calisthenics routine in the park along with my friend J.
I usually take 650mg/day to reduce fatigue, and make me more productive at work. It really increase alertness, but it can't push me more, when my mind gets tired (not good for staying up all night and learning for an exam).
I have been struggling with focus in my university courses for over a year now since I began taking oxycodone for a herniated disc. 5:30pm:Starting with 2x 1000mg tablets (playing halo with friends) 5:45pm: No subjective effects 6:00pm: Increase in heart rate (not enough to cause concern) 6:20pm: Completely 'dialed in'...
I heard about the stimulant and potentially perception altering effects of tyrosine, so I figured I'd give it a shot. I bought a bottle for about 10 bucks and it had 60 pills at 1000mg each. I popped one and went ahead and started my training regimen that day.
L-Tyrosine's nerd page
Pharmacology, chemical data, effect profiles, and more
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Helpful Links
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