I recently went in to see my doc about low sex drive and, after a variety of lab tests, was told that my testosterone levels were "low-normal". I'm all right with that since I don't want to go on prescription treatment, but it seems to me that they are quite low for someone my age and activity level, and I don't believe it's normal at all to hardly notice when a very attractive woman walks by.
These were my lab values:
Age: 24 Height: 6'1" Weight: 170
Free Test: 6.2 ng/dl Total Test: 249 ng/dl
I've been pretty strict about limiting grains and dairy for the last two to three months and I almost always get 8+ hours of sleep a night. I have been waking up to pee in the night a lot more than I used to, which led me to believe it might be my cortisol. I have one cup of coffee in the morning before work and usually some form of tea while at work, but I almost never have trouble falling asleep. I've been taking tribulus terrestris just to see if it does anything (nothing so far), but is there anything else I can do that might bring me up a few notches?
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If you increase your saturated fat, you'll be able to make more, assuming that you don't have a pregnenolone steal going on due to chronic stress. Things like butter for example.
Yes, tribulus terrestris is a good way to signal DHEA to convert into testosterone, but be sure to also add a chelated zinc. ZMA is another thing you can do, but it can cause weird dreams and sleep disturbances.
If you have excess body fat, your fat cells will aromatise testosterone into estrodial (a form of estrogen) so taking DIM will help prevent that.
What are your cholesterol levels?
You should check diurnal cortisol + DHEA. I recommend this test: http://www.canaryclub.org/advanced-saliva-hormone-profile.html
I'll second Grocket. A low carb, high protein diet (which sounds like how you eat) is well established to lower testosterone:
Start eating a bunch of carbs and I'd big money your T will start moving its way up.
If you're not interested in going over to the dark (carb) side just yet taking magnesium might also help:
"Our results show that supplementation with magnesium increases free and total testosterone values in sedentary and in athletes."
If you want to try a homeopathic method try High Intensity Interval Training. According to Doctors and trainers alike, this form of activity is supposed to increase testoserone levels in males. I believe any exersize will increase testoterone and libido, but apparently many studies have shown that T-levels and libido dramatically increase in males over 35 naturally when performing HIIT. I see no reason why it wouldn't help a 24 year old.
Stick with a high fat, moderate protein, moderate carb Paleo template with a good amount of red meat/eggs/sat fat. Lower your salt intake (causes inflammation, search salt and helper T cell inflammation). Avoid diet sodas (toxic + screws with serotonin) and caffeine (adrenal burn out). Moderate exercise is fine. your getting enough sleep.
Lastly, if you have a problem with porn/masturbation or over-sexing, you should cut that out. Really depletes your hormones and neurochemicals if you chronically satisfy yourself. no fap
Okay, let me jump on the carbohydrate bandwagon as well. Unless you have a really strong reason for going low carb (digestion issues, Candida overgrowth, trying to lose body fat) I think it is prudent to keep your carbohydrate intake close to 150 grams/day. I was doing about 75 grams/day for a year and it left me lethargic, low sex drive, and feeling cold (...although on the plus side I got very lean). Adding just 10-20 grams/day of carbohydrates can make the world of difference.
In his book 'Perfect Health Diet' Paul Jaminet goes on at length about the virtues of potatoes. You might want to simply add a portion of potatoes to your daily diet. Conversely he thinks carbohydrates from fruit (fructose) should be minimized. Along with many others on this forum I strongly recommend you read this book. The diet is best viewed as Paleo plus starchy veggies. It also has a great section on supplements.
Your diet seems to be pretty low carb. I would consider increasing carbs. Significantly if necessary. I went through this and would tag my response with "N=1" but there are plenty of stories on this site about people who ate pretty low carb that suffered from similar symptoms plus low energy/fatigue, cold hands and recovered from this approach. Hope this helps.
This article may offer you some ideas on how to increase it: http://www.artofmanliness.com/2013/01/18/how-to-increase-testosterone-naturally/