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[Juvenile hormones, reality or myth?]
Verhandelingen - Koninklijke Academie Voor Geneeskunde Van Belgie
|January 1, 1997
Summary
Dehydroepiandrosterone (DHEA) and melatonin are hormones that decrease with age. While some studies suggest potential benefits like improved well-being and sleep, scientific evidence for significant anti-aging effects in humans remains limited and requires further research.
Area of Science:
- Endocrinology
- Gerontology
- Pharmacology
Context:
- Media attention on
- rejuvenating
- pills
- DHEA
- melatonin
- raised
- irrational
- expectations
- among
- elderly
- population.
- Both
- hormones
- decrease
- with
- age.
- DHEA
- levels
- are
- considered
- by
- some
- as
- a
- marker
- of
- biological
- age.
- Melatonin
- levels
- are
- linked
- to
- sleep
- quality
- and
- depression.
- Animal
- studies
- show
- potential
- effects
- but
- with
- caveats.
- High
- dose
- DHEA
- induced
- cancer
- in
- rats.
- Melatonin
- inhibits
- gonadotropins,
- contradicting
- sexual
- enhancement
- claims.
Purpose:
- To critically evaluate the scientific evidence behind the purported
- rejuvenating
- effects
- of
- dehydroepiandrosterone
- (DHEA)
- and
- melatonin
- in
- the
- elderly.
- To
- assess
- their
- potential
- benefits
- and
- risks
- based
- on
- current
- research.
Summary:
- Dehydroepiandrosterone (DHEA): Exhibits in vitro anti-oxidative and anti-platelet effects. Preliminary human studies show improved well-being and hormonal changes (testosterone, estradiol) in the elderly. However, animal studies showed carcinogenic potential at high doses.
- Melatonin: Known for regulating circadian rhythms and improving sleep. In vitro studies suggest anti-oxidative properties. While effective for jet lag and sleep disturbances, claims of life extension and sexual enhancement are unsubstantiated; it may even cause gonadal atrophy.
Impact:
- Current evidence suggests moderate benefits of DHEA for elderly well-being, warranting further controlled studies. Melatonin's established role in sleep regulation is confirmed, but claims of anti-aging and sexual enhancement lack robust scientific support. High-dose DHEA poses risks.
- Highlights the need for critical evaluation of media-hyped supplements. Emphasizes the importance of well-controlled clinical trials to validate therapeutic claims for hormones like DHEA and melatonin in aging populations.