ALT value in men: liver, training and compounds

The assay measures how much ALT enzyme is circulating in your blood, in units per litre. In full it is called alanine aminotransferase. Older reports say SGPT.

The enzyme belongs inside the liver cell. It sits mainly in the liver, at far higher concentration than in other tissue. If the cell membrane is damaged, it leaks out. The amount in your blood is therefore a measure of damage to your liver.

What the enzyme cannot do is identify the cause. For that you look at the company it keeps on the report.

AST comes from many tissues, including muscle and heart. If AST sits above ALT, muscular loading is often involved. Gamma-GT and alkaline phosphatase come from the bile ducts. If those two rise together, this is about bile flow rather than the liver cell.

For men using compounds, that distinction is the most important thing on this page. The table below sets the three patterns side by side.

Which pattern you see determines which further investigation makes sense.

For men this enzyme runs along three routes, and they do not weigh the same.

The first route is the most common and the least dramatic. Fatty liver is the ordinary reason for a mildly raised result in the Netherlands. It tracks abdominal fat and insulin sensitivity, not the number on the scale.

A man with visible abs and plenty of visceral fat simply exists. The rise usually stays below three times the upper limit.

The second route is alcohol. Heavy alcohol use raises liver values and shifts the ratio with AST. With alcohol, AST often sits above ALT, with a raised gamma-GT alongside. That pattern is recognisable and it fades with abstinence.

The third route is why this page exists. Oral anabolic compounds burden the liver in their own way. The classic picture is cholestasis: alkaline phosphatase and gamma-GT up, with ALT following.

Bilirubin can rise, producing jaundice and dark urine. That is not a side effect to sit out.

Even without compounds the stack counts. High-dose green tea extract, ashwagandha and curcumin extracts recur in reports of liver injury. Pre-workouts with many ingredients are hard to assess.

Viral hepatitis gives the other extreme, with a strongly raised result. Serology establishes hepatitis B; this enzyme does not.

Finally a number that is rarely mentioned. The healthy upper limit among screened donors sat near 30 u/l for men, not at 45. For anyone tracking his body seriously, that is the more usable anchor.

ALT belongs on every liver panel. For men who train or use compounds, timing matters more than frequency.

Keep 48 to 72 hours between your last heavy session and the draw. Muscular effort lifts ALT less than AST, but the effect is there. After a first hard leg day or a competition you should wait longer.

If you are running an oral cycle, a baseline measurement beforehand is indispensable. Without that value you cannot know afterwards what changed. Measure during the cycle and again some weeks after it.

Never request ALT on its own. Without AST, gamma-GT, alkaline phosphatase and bilirubin you miss the pattern. That pattern is exactly what separates muscle from liver cell from cholestasis.

If the result stays abnormal after a rest period, further investigation belongs with it. That means serology for hepatitis B and C, and iron status.

Always put a raised result in front of your GP. Even when you suspect where it comes from.