Low-fat diets have been linked to decreased testosterone levels in men, according to a meta-analysis published in The Journal of Steroid Biochemistry and Molecular Biology. 1
Essentially, low-fat diets can decrease the production of testicular testosterone levels. Not to mention that men are already fighting an uphill battle as they age: total testosterone levels decline at 1.6% a year and bioavailable levels at 2-3% per year.2 Like any challenge, you can lean in or give up. Here is a quick guide on testosterone levels and how to fight back as you age:
WHAT IS FREE VS TOTAL TESTOSTERONE?
Let's start with the basics. You will hear those degrading commercials on late night TV saying your testosterone is down or you need more Free T, but what is the difference?
- Free: in the blood and bioavailable. It is not bound to a protein. It’s easily used by the body.
- Total: the total level of testosterone, both bound and unbound.
WHAT ARE THE SIGNS OF LOW TESTOSTERONE?
Getting old is a weird feeling. It's difficult to attribute the changes we feel to either activities (or lack there of) and simply just getting older. As we said earlier, men are going to feel the signs of low testosterone eventually. It's not a matter of if, but when. Here's a helpful list of some of the symptoms:
- Fatigue
- Mood changes
- Decreased memory
- Increased body fat
- Decreased libido
- Lower semen volume
- Erectile dysfunction
FOODS THAT KILL TESTOSTERONE
There are even specific foods that lower your testosterone levels:
- Soy-Based Foods
- Processed & Frozen Foods
- Nuts
- Flax & Flax Seeds
- Alcohol
- Vegetable Oils
- Mints
FOODS THAT BOOST TESTOSTERONE
Now let's take a look at the foods that help support testosterone levels:
- Tuna, Salmon, & Sardines
- Egg Yolk
- Fortified Cereal & Milk
- Shellfish
- Beans
- Beef
- Potatoes
- Avocados
HOW TO INCREASE FREE TESTOSTERONE LEVELS?
So we talked about free testosterone being helpful, now let's discuss some simple ways to increase them:
How To Increase Free Testosterone Levels?
- Manage stress levels
- Watch your BMI
- Potentially vitamin D
- Squats! True story.
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1Whittaker, J., & Wu, K. (2021). Low-fat diets and testosterone in men: Systematic review and meta-analysis of intervention studies. The Journal of steroid biochemistry and molecular biology, 210, 105878. https://doi.org/10.1016/j.jsbmb.2021.105878
2Feldman, H. A., Longcope, C., Derby, C. A., Johannes, C. B., Araujo, A. B., Coviello, A. D., Bremner, W. J., & McKinlay, J. B. (2002). Age trends in the level of serum testosterone and other hormones in middle-aged men: longitudinal results from the Massachusetts male aging study. The Journal of clinical endocrinology and metabolism, 87(2), 589–598. https://doi.org/10.1210/jcem.87.2.8201