Our results challenge the ‘ovulatory shift hypothesis’ as faces of males with high circulating testosterone were rated as less attractive than faces of males with lower testosterone by women on the fertile phase of the cycle.
Testosterone is measured in nanograms per deciliter (ng/dL). At its peak, during your adolescent years, a normal range for your testosterone is anywhere between 300 and 1,200 ng/dL. When you’re entering your mid-thirties, you’ll start to see it declining by at least one percent per year.
Aggressive and irritable behavior. Acne-prone skin. Sleep apnea. Stunted growth. Heart or liver problems. Mood swings. Insomnia. Leg and feet swelling. Don’t rely on these symptoms, however, to determine whether or not you have high testosterone levels.
Methods. We conducted a randomised double-blind, parallel, placebo controlled trial at a tertiary referral centre. A total of 100 obese men (body mass index ≥ 30 kg/m 2) with a total testosterone level of or below 12 nmol/L and a median age of 53 years (interquartile range 47–60) receiving 10 weeks of a very low energy diet (VLED) followed by 46 weeks of weight maintenance were randomly
Hair growth is caused by testosterone pooling under the skin. So if a part of your body is hairy, there's probably testosterone under your skin in that place. That's not necessarily reflective of free T, which is the chemical that causes traits typically associated with masculinity.

Atavistic residues of aggressive behavior prevailing in animal life, determined by testosterone, remain attenuated in man and suppressed through familial and social inhibitions. However, it still manifests itself in various intensities and forms from; thoughts, anger, verbal aggressiveness, competition, dominance behavior, to physical violence.

The most common TRT side effect is an increased red blood cell count (more on that below), but other side effects of testosterone replacement therapy include: Acne or oily skin. Worsening sleep apnea. Breast swelling or tenderness. Infertility, due to a decreased sperm count. Shrinkage of the testicles.
nausea. pain in the chest, groin, or legs, especially the calves. pain or discomfort in the arms, jaw, back, or neck. severe, sudden headache. slow or slurred speech. sudden loss of coordination. sudden, severe weakness or numbness in the arm or leg. sweating. vision changes.
A prospective study of 31 transgender men newly started on either subcutaneous 50-60mg/week testosterone cypionate, 5g/day 1% testosterone gel, or 4mg/day testosterone patch found that after 6 months only 21 (68%) achieved male range testosterone levels and 5 (16%) had persistent menses, with only 9 (29%) achieving physiologic male-range

Hypogonadism is a medical term for decreased functional activity of the gonads. The gonads (ovaries or testes) produce hormones (testosterone, estradiol, antimullerian hormone, progesterone, inhibin B, activin) and gametes (eggs or sperm). [ 1] Male hypogonadism is characterized by a deficiency in testosterone – a critical hormone for sexual

Reproductive Hormones. January 24, 2022. The main reproductive hormones estrogen, testosterone, and progesterone are instrumental in sexuality and fertility. They are responsible for pregnancy, puberty, menstruation, menopause, sex drive, sperm production and more. These hormones are produced in the ovaries (in females) and testes (in males).

Despite the widely observed high risk-taking behaviors in males, studies using the Iowa gambling task (IGT) have suggested that males choose safe long-term rewards over risky short-term rewards. The role of sex and stress hormones in male decision-making is examined in the initial uncertainty and the latter risk phase of the IGT. The task was tested at peak hormone activity, with breath

Free T is the currently "active form" of testosterone in your body. It's the form that binds to androgen receptors. The vast majority of your testosterone is bound to SHBG or Albumin. Only around 2% is free testosterone. So if Free T is the active form, then why is total T important? Because Free T has a very short half life (10 minutes).
Good point. maybe one reason why humans are more cooperative, is that some are low testosterone, and are willing to just do the menial stuff or take order from the high-testosterone humans. There are a lot of humans who wouldn’t want to cook. Traditionally, high-testosterone men don’t cook, and low-testosterone women cook for them, for
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