FASTING: Testosterone?

December 14, 2025

For the last two weeks, I’ve been trying a controlled intermittent-fasting. Following is what I tried, what effects I got on lab results.

Food

  • I’ve limited myself to one structured meal a day.
  • My total daily intake has stayed < 1,000 kcal. (Maintenance calories ~ 3000 kcal).
  • Total protein intake ~ 100 g of protein, primarily from whey and paneer.
  • In the last 15 days, I have not consumed any simple sugars and rice. (Took 2 small cheat meals - samosa, tea, chilli potato, sandwich).

Training:

  • I’ve continued my usual heavy weight-training routine.
  • In 15 days, a total of five high-intensity sessions (30-min HIIT and Zone-2 cardio).

Sleep

  • My sleep schedule has been IRREGULAR.
  • Some days with < 4 hours of daytime sleep, some with 6 hours, and one day with a full 8 hours (ironically, that’s the day I felt the most sluggish).

Daily supplementation:

  • Magnesium glycinate - 440 mg elemental magnesium.
  • Creatine monohydrate - 10 g.
  • Calcium - 500 to 1,000 mg.
  • Vitamin D - 250 IU on some days, 1000 IU on others.
  • High caffeine load from coffee plus a pre-workout (caffeine, creatine, BCAA).

Now, the interesting part - Lab results

A couple of days ago, I ran a lab panel out of curiosity. Results were genuinely interesting. See the images below. I was not expecting this level of testosterone and cortisol.

1. Testosterone, Glucose Fasting: Lab Reports

2. FSH, LH, Prolactin: Lab Reports

3. RFT, LFT, Uric: Lab Reports

4. Cortisol: Lab Reports