ALT (also called SGPT) is a liver enzyme that rises when liver cells are damaged or inflamed. Healthy levels fall between 7 and 55 U/L for men and 7 and 45 U/L for women. If your results came back high, the good news is that elevated ALT often responds well to lifestyle changes, sometimes within weeks.
Rule Out Temporary Causes First
Before assuming something is wrong with your liver, it’s worth knowing that a few common things can temporarily spike ALT. Intense exercise is the most overlooked culprit. In one study, healthy men who completed a single hard workout saw their ALT rise significantly and stay elevated for a full seven days afterward. When one patient with unexplained high ALT simply stopped exercising for a week before retesting, all his liver enzymes came back normal.
If you did a tough gym session, a long run, or heavy yard work in the days before your blood draw, ask your doctor about retesting after a week of rest. Certain over-the-counter medications, including acetaminophen (Tylenol) and some herbal supplements, can also push ALT up temporarily.
Lose a Modest Amount of Weight
The single most effective way to lower ALT for most people is losing body fat, because the most common cause of chronically elevated ALT in adults is fatty liver disease. You don’t need a dramatic transformation. Losing just 3 to 5 percent of your body weight is enough for fat to start disappearing from liver cells. For someone weighing 200 pounds, that’s 6 to 10 pounds.
If your liver already has inflammation or early scarring, a larger loss of around 10 percent of body weight is typically needed to improve those changes. The key is gradual, sustained weight loss rather than crash dieting, which can actually worsen liver inflammation in the short term. Aim for one to two pounds per week through a combination of diet and exercise.
Choose Aerobic Exercise Over Resistance Training
Both types of exercise are good for overall health, but research from Duke University found that aerobic exercise is significantly more effective than resistance training at reducing liver fat and lowering ALT. In that study, overweight adults who did the equivalent of about 12 miles of moderate jogging or brisk walking per week saw meaningful drops in liver fat, belly fat, and ALT levels. The resistance training group, doing three sessions per week of eight exercises at three sets each, reduced some body fat but did not significantly improve liver fat or ALT.
This doesn’t mean you should skip strength training entirely. But if your primary goal is bringing ALT down, prioritize cardio. Brisk walking, cycling, swimming, or jogging for 150 to 200 minutes per week is a reasonable target. Start wherever you are and build up gradually.
Cut Back on Alcohol
Alcohol is directly toxic to liver cells, and even moderate drinking can keep ALT elevated in some people. If your levels are high and you drink regularly, reducing or eliminating alcohol is one of the fastest interventions available. Many people see their liver inflammation markers start improving within two to four weeks of stopping, especially if the underlying issue is fatty liver.
You don’t necessarily need to quit permanently, but giving your liver a sustained break of at least a month lets you see whether alcohol was the main driver. If ALT drops substantially during that time, you have a clear answer.
Adjust Your Diet
No single food will dramatically lower ALT on its own, but dietary patterns matter. Diets high in added sugars, particularly fructose from sweetened drinks and processed foods, promote fat buildup in the liver even in people who aren’t overweight. Reducing sugary beverages, refined carbohydrates, and fried foods while increasing vegetables, whole grains, and lean protein supports liver health and makes weight loss easier.
Coffee deserves a special mention. Multiple large studies have consistently found that regular coffee consumption is associated with lower ALT levels and reduced risk of liver disease progression. Two to three cups per day appears to be the range where benefits show up most clearly. Black coffee or coffee with minimal added sugar is preferable to sugar-heavy specialty drinks.
Vitamin E for Fatty Liver Disease
For people specifically diagnosed with non-alcoholic fatty liver disease, vitamin E has shown the ability to reduce ALT in clinical trials. Two major liver disease organizations have suggested 800 IU daily as the dose used in studies. However, vitamin E at high doses carries its own risks, including a slightly increased chance of bleeding and, in some research, prostate cancer in men. This is a supplement worth discussing with your doctor before starting rather than self-prescribing.
How Quickly ALT Can Drop
The timeline depends on the cause. Alcohol-related elevations can improve in two to four weeks of abstinence. Exercise-induced spikes resolve within about a week of rest. Weight loss takes longer to show results on blood work, typically two to three months of consistent effort before a retest reflects meaningful change.
If your ALT remains elevated after several months of lifestyle changes, your doctor may investigate other causes, including hepatitis, autoimmune conditions, or medication side effects. A persistently elevated ALT that doesn’t respond to the basics usually warrants further testing rather than more aggressive lifestyle modifications alone.