Alanine Aminotransferase
Liver Function marker
ALT
Alanine Aminotransferase
Category: Liver Function
Unit: U/L
Enzyme primarily found in the liver. Elevated levels indicate liver cell damage.
PED Notes
Oral AAS (especially 17-alpha alkylated compounds like Dianabol, Anadrol, Winstrol) significantly elevate ALT. Intense weight training can also cause mild elevation. Values 2-3x upper limit common on orals. Values up to ~100 U/L on oral AAS are common but should not be ignored long-term.
When high
Supplements:
- TUDCA -- 500-1000mg/day (with meals), bile flow and hepatoprotection; most evidence-supported supplement for AAS-induced cholestatic pattern
- NAC -- 1200-1800mg/day (empty stomach, divided doses), glutathione precursor; supported by mechanistic and observational data in AAS hepatotoxicity
- Milk Thistle (Silymarin) -- 300-600mg/day; standard form OR Silymarin Phytosome (Siliphos) 200mg 2x/day for ~10x absorption vs standard silymarin
- Alpha-Lipoic Acid (ALA) -- 300-600mg/day
Compound/AAS adjustments (highest-leverage intervention):
- Switch oral AAS to injectable equivalents -- injectable Winstrol, injectable Primobolan, injectable Anavar preparations substantially reduce hepatic first-pass burden vs oral versions; this is the single most effective intervention for AAS-induced ALT elevation
- Drop 17-alpha-alkylated orals entirely (Dianabol, Anadrol, Winstrol, Anavar, Superdrol, Halotestin) if enzymes persistently >3x ULN or alongside rising bilirubin
- Note: Proviron (mesterolone) is NOT 17-alpha-alkylated; it is hepatically well-tolerated and does not stress liver enzymes meaningfully
- Reduce alcohol to zero during any oral AAS cycle; alcohol and oral AAS hepatotoxicity are synergistic
Pharmacological options (severe or cholestatic elevation):
- Ursodeoxycholic acid (UDCA / Actigall) -- 10-15mg/kg/day (typically 500mg 2x/day for 80kg adult); prescription bile acid; more potent than TUDCA for confirmed AAS-induced cholestasis; case reports show resolution of bilirubin >100 umol/L with UDCA
- Indication: ALT >5x ULN with rising bilirubin, or a confirmed cholestatic pattern on imaging/biopsy
- All require physician oversight
Lifestyle:
- Reduce or eliminate oral steroids if persistently elevated
- Avoid alcohol and hepatotoxic medications
- Allow 8-12 weeks off orals between cycles for enzyme normalisation
History Chart
Reading History
Frequently Asked Questions
Reference Ranges
Standard Range
0 - 40 U/L
VitalMetrics Range
0 - 55 U/L