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相关概念视频

Testosterone: Functions and Regulation01:26

Testosterone: Functions and Regulation

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The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...
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Signs of Puberty01:27

Signs of Puberty

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Puberty is a critical phase, typically beginning between the ages of 8 and 13 in girls and 9 and 14 in boys, though timing can vary based on genetics, environmental factors, and overall health. This period is characterized by the development of secondary sexual characteristics and the attainment of reproductive potential. Endocrine changes underpin puberty, with hormonal surges of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) instigated by Gonadotropin-Releasing Hormone (GnRH)...
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Disorders of the Male Reproductive System01:20

Disorders of the Male Reproductive System

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Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra....
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Major Hormones and Their Functions01:27

Major Hormones and Their Functions

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Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and...
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Serum Studies: Renal Function Tests01:24

Serum Studies: Renal Function Tests

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Renal function tests are crucial for assessing kidney health, monitoring disease progression, and evaluating the kidneys' efficiency in waste elimination, fluid balance, and electrolyte regulation. These tests offer critical insights into kidney function, even though routine measurements may appear normal until there is a significant decline in the glomerular filtration rate or GFR. Typically, signs of kidney impairment only become evident when the GFR falls to about 50% of its normal level.
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Male Sexual Response: Erection & Ejaculation01:17

Male Sexual Response: Erection & Ejaculation

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Sexual stimulation can take various forms, such as physical touch and visual or auditory cues. When this happens, the parasympathetic reflex in the sacral portion of the spinal cord is activated. This reflex stimulates the release of nitric oxide (NO), which then dilates the arterioles in the penis, increasing blood flow to the erectile tissues - the corpora cavernosa and corpus spongiosum.
The blood filling the erectile tissues compresses the veins, which helps to prevent blood from leaving...
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"增强剂"真的可以增加血清总吗? 一个系统的审查.

Afonso Morgado1, Georgios Tsampoukas2, Ioannis Sokolakis3

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概括

大多数激素增强剂未能提高水平. 除此之外,Beta-hydroxyBeta-methylbutyrate和Betaine适用于运动员,其中一些补充剂在特定的男性群体中显示出可能的有效性.

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科学领域:

  • 内分泌学 在内分泌学.
  • 营养科学 营养科学
  • 运动医学 运动医学

背景情况:

  • 激素增强剂被广泛推销,但有未经验证的说法.
  • 有限的监管监督允许销售没有被证明有效的补充剂.
  • 了解这些补充剂的有效性对于消费者健康至关重要.

研究的目的:

  • 在过去的二十年里,系统地审查有关激素增强剂的科学文献.
  • 评估各种增强剂在提高总水平方面的有效性.
  • 为了评估四个不同的男性群体的影响:运动员,下阴腺,不孕和健康的男性.

主要方法:

  • 对已发表的关于激素增强剂的研究进行了系统审查.
  • 包括52项研究,检查了27种不同的激素增强化合物.
  • 与安慰剂相比,分析了专注于总丸激素增加的数据.

主要成果:

  • 大多数激素增强剂没有显示总的显著增加.
  • 在男性运动员中,β-基β-甲基酸盐和β-乙是有效的.
  • 长叶,TesnorTM,PrimaVieTM和Withhania somnifera在特定群体中显示出可能的疗效.

结论:

  • 大多数商业上可用的激素增强剂缺乏有效性的科学证据.
  • 特定的化合物,如β-基β-甲基酸,β-乙,长叶,和Withhania somnifera显示潜在的好处.
  • 需要进一步的研究来验证针对目标人群的某些增强剂的疗效和安全性.