No reliable human study shows that grass-fed beef increases testosterone more than grain-fed beef. Grass-fed beef can have a different fatty-acid and mineral profile, but testosterone has not been established as a specific benefit.
A 1996 controlled feeding study of 43 men found higher testosterone on a high-fat diet, but it did not test grass-fed beef. More recent research has not established a clear testosterone benefit from higher dietary fat, either.
At a Glance
| Question | Evidence-Based Answer |
|---|---|
| Does grass-fed beef raise testosterone? | Not demonstrated in human clinical research. |
| Is grass-fed beef more testosterone-boosting than grain-fed beef? | No direct evidence supports that claim. |
| Can dietary fat affect testosterone? | Possibly, but results are inconsistent. |
| Is grass-fed beef nutritionally different? | Often, especially in its omega-3 content, but results vary by cattle breed, pasture, cut and finishing system. |
What Study Has Tested Grass-Fed Beef and Testosterone?
Human studies of grass-fed beef have generally measured post-meal metabolites, fatty acids, inflammation or nutrient composition. They have not established an increase in blood testosterone.
One randomized crossover study compared organic grass-fed beef with conventional beef in 10 adults. Researchers measured changes in blood metabolites for four hours after the participants ate steak. The study found differences in metabolic profiles, but it did not show that grass-fed beef increased testosterone.
Other studies have compared the nutrient composition of grass-finished and grain-finished beef. They often report differences in omega-3 fatty acids, antioxidants and minerals. Those findings do not show that eating the meat increases testosterone in people.
What Does the Dietary-Fat Research Show?
A 1996 controlled feeding study included 43 healthy men. The participants followed a low-fat, high-fiber diet and a high-fat, low-fiber diet for 10 weeks each. Testosterone levels were 13% higher on average during the high-fat, low-fiber diet, while SHBG-bound testosterone was 15% higher.
The study did not test grass-fed beef. The two diets also differed in total fat, saturated fat, polyunsaturated fat and fiber, so the result cannot be attributed to beef or to grass-fed beef.
More recent evidence does not show a clear testosterone effect. A 2025 systematic review and meta-analysis of 11 randomized trials involving 888 adults found no significant difference in testosterone between low-fat and high-fat diets. The testosterone analysis included five trials and showed substantial variation between studies. The authors rated the overall evidence as limited.
Eating enough dietary fat may support overall health, but grass-fed beef has not been shown to raise testosterone.
Why Do Some People Associate Grass-Fed Beef With Higher Testosterone?
The claim usually rests on three points.
Grass-fed beef can contain more omega-3 fatty acids. Reviews and beef-composition studies often find higher omega-3 levels in grass-finished samples. The difference varies considerably between products, however.
Beef provides nutrients involved in normal hormone function. Beef contains protein, zinc, selenium, iron and vitamin B12. These nutrients support normal physiology. Getting more of them does not automatically increase testosterone when a person already gets enough.
Some beef contains naturally occurring hormones. A 2025 analysis of retail beef measured several endogenous and synthetic hormonal compounds in beef samples. Detecting a hormone in meat does not show that eating the meat raises testosterone in human blood.
Should You Buy Grass-Fed Beef for Testosterone?
No. Choose grass-fed beef for its taste, production system or fatty-acid profile, not as a testosterone supplement.
If your goal is to support normal testosterone, the more relevant factors include:
- Adequate calorie and protein intake
- Sufficient dietary fat
- Regular resistance training
- Healthy body composition
- Adequate sleep
- Correcting nutrient deficiencies
- Limiting heavy alcohol use
- Managing conditions such as obesity, sleep apnea or diabetes
If low testosterone is a concern, diet should not replace testing. The Endocrine Society recommends diagnosing testosterone deficiency only when compatible symptoms occur alongside consistently low results from accurate morning testing. A second morning measurement is generally used to confirm the result.
Bottom Line
Grass-fed beef has not been shown to increase testosterone in humans, and no reliable study shows that it works better than grain-fed beef for testosterone. The clearest differences between the two relate to nutrients and fatty acids, not a measurable testosterone-boosting effect.