Is testosterone really that important for blokes doing resistance training?
Absolutely. Testosterone is a powerhouse hormone for men, playing a vital role in everything from reproductive health to, critically, helping your muscles grow bigger and stronger. That's why you see so many testosterone-boosting supplements and strategies floating around online.

Does how much fat I eat affect my testosterone levels?
Yep, it does. Research shows that eating a bit more dietary fat can indeed bump up your testosterone. A meta-analysis comparing low-fat diets (around 19% of calories from fat) to higher-fat diets (around 39% of calories from fat) found that the higher-fat approach tended to increase total testosterone, as well as free testosterone and dihydrotestosterone (DHT).

How much of an increase in testosterone can I expect from eating more fat?
While there's an increase, it's generally pretty modest, usually in the range of 50-100 ng/dl. While that's not a massive jump, it could be more significant for blokes whose testosterone levels are already on the lower side of the normal range, potentially impacting things like muscle growth, libido, or energy.

What's the sweet spot for dietary fat intake to boost testosterone?
Based on current findings, aiming for about 30-40% of your total daily calories from fat seems to be a good target. If you're on a lower-calorie diet, around 1 gram of fat per kilogram of body weight is a reasonable guideline. Going much beyond 30-40% might not lead to further increases in testosterone, and could even mean you're cutting back too much on protein or carbs, which are also crucial for strength and muscle growth.

Why does a low-fat diet seem to reduce testosterone?
The main reason appears to be a reduction in your body's own production of testosterone. It's not so much about increased excretion or changes in how testosterone binds in the body. Interestingly, some of the biggest drops in testosterone were seen in studies where men were on vegetarian low-fat diets. This suggests that low intakes of essential nutrients like zinc or vitamin D, or even higher fibre intake, could also be playing a role.

Should I just go all out and eat as much fat as possible?
Nah, probably not. While more fat can help, there's likely a point of diminishing returns. It's unclear if going significantly beyond 30-40% of calories from fat will keep boosting testosterone. Plus, if you push your fat intake too high (say, 40% or more), you'll inevitably have to reduce your intake of other important macronutrients like protein and carbohydrates. Protein is super important for muscle strength and growth, and cutting carbs too low has actually been shown to decrease testosterone too. It's all about finding a balance.

Does this testosterone boost from fat intake mean I'll get heaps more muscle?
For blokes with normal testosterone levels, the modest increase might not dramatically boost muscle hypertrophy (muscle growth). However, if your testosterone levels are on the lower end of the normal range, this increase could have a more noticeable impact on outcomes like muscle growth, libido, or overall energy.

Are there any specific types of fats that are better for testosterone, or is it just total fat?
The source primarily focuses on total dietary fat intake and its impact. While it doesn't delve into specific types of fats (like saturated, monounsaturated, or polyunsaturated), it generally suggests that ensuring sufficient dietary fat intake within the recommended range is key. Maintaining a balanced diet with various fat sources as part of that 30-40% target would be a sensible approach.