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Rapamycin extends mouse lifespan 9–14%
NAD+ precursors reverse aging in humans
Blue-light glasses improve sleep quality
Walking 10 min after meals blunts glucose
Verdict change — caffeine half-life downgraded

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How Hormones Shape Sexual Orientation & Behavior | Dr. Marc Breedlove — Whalespan

Content›Video›How Hormones Shape Sexual Or…

How Hormones Shape Sexual Orientation & Behavior | Dr. Marc Breedlove

Andrew Huberman2h 11m · 2026-03-30

Claims Made

184

Claims Supported

143

Support Rate

78%

Support rate

143 of 184 claims supported

143 supported41 partial / not

Claims from this content

74

✓Well SupportedAG1 is a vitamin, mineral, probiotic drink with adaptogens designed to meet foundational nutritional needs and provide insurance for adequate fruit and vegetable intake.✓Well SupportedComprehensive blood testing is vital for detecting many aspects of mental and physical health, and Function Health offers this affordably.✓Well SupportedThe book 'Protocols: An Operating Manual for the Human Body' offers scientifically substantiated protocols for sleep, exercise, stress control, and focus/motivation.✓Well SupportedTaking AG1 daily improves physical health, mental health, and cognitive and physical performance, as evidenced by noticeable differences during lapses in use.

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A. Volkovreader

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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.

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✓Well Supported

Andrew Huberman consumes one to two David bars daily to help meet his protein goal of one gram per pound of body weight without excess calories.

✓Well SupportedAndrew Huberman consumes a David bar in the late afternoon or mid-morning when hungry between meals to help meet protein goals without excess calories.

✓Well SupportedThe decline in testosterone levels in men is gradual and shows significant individual variation, making it difficult to predict specific levels based on age alone.

✓Well SupportedThe D2 to D4 digit ratio is greater in self-reported females than in males, meaning D2 and D4 are more similar in length in females.

✓Well SupportedIndividuals with XY chromosomes and a mutated androgen receptor gene will develop as infertile females despite having the SRY gene and producing testosterone.

✓Well SupportedAurora water filters remove endocrine disruptors and disinfection byproducts while preserving magnesium and calcium.

✓Well SupportedHigher prenatal androgen exposure is associated with a smaller D2 to D4 digit ratio in mice and humans.

✓Well SupportedTap water can contain contaminants that negatively impact health.

✓Well SupportedIn-utero testosterone influences finger length ratios and sexual orientation independently of postnatal hormone levels.

✓Well SupportedFunction offers advanced MRI and CT scans in their health testing services.

✓Well SupportedTestosterone levels show a significant peak during a critical developmental window when the brain is forming, influencing the development of male versus female brains.

✓Well SupportedSimon LeVay's study on the sexually dimorphic nucleus of the preoptic area in gay versus straight men was replicated by an independent group.

✓Well SupportedIndividuals with good libido, sexual function, and muscle mass should not be concerned if their testosterone levels are at the low end of normal.

◐Partially SupportedA sex difference in otoacoustic emissions present at birth may reflect prenatal testosterone exposure.

◐Partially SupportedHormones impact mood and behavior, and mood and behavior can impact hormones.

◐Partially SupportedKinsey survey data shows a linear progression of increased probability of being gay with more older brothers.

◐Partially SupportedLesbians may have been exposed to more prenatal testosterone than straight women on average, suggested by digit ratio.

◐Partially SupportedTestosterone exposure in the womb influences finger length ratios, creating a difference between males and females.

✓Well SupportedDifferences in testosterone levels in males explain their greater likelihood of engaging in rough-and-tumble play and having more energy.

◐Partially SupportedThe smaller size of a specific nucleus in the preoptic area of gay men compared to straight men suggests either less androgen exposure or a reduced response to androgens.

◐Partially SupportedPrenatal testosterone exposure may increase the likelihood of same-sex attraction in females.

◐Partially SupportedIn men, the pointer finger and ring finger lengths tend to be more different than in women, especially on the right hand.

◐Partially SupportedPrenatal testosterone exposure may influence sexual orientation, potentially making individuals more likely to be attracted to women later in life.

◐Partially SupportedActivities involving deliberate aggression, such as contact sports, can increase androgen levels.

◐Partially SupportedWomen exhibit more plasticity in their sexual longings and orientation than men.

◐Partially SupportedTestosterone has definite effects on the adult brain, even in elderly men who have undergone prostate cancer treatment.

◐Partially SupportedWinning competitions can lead to increased testosterone levels in winners and decreased levels in losers.

◐Partially SupportedHormonal and neural effects during development guide adolescent and adult behavior, including sexual preference.

◐Partially SupportedWinning a competition or election can temporarily increase testosterone, while losing can decrease it.

◐Partially SupportedApproximately 1 in 12 males and females are heterozygous for congenital adrenal hyperplasia (CAH).

◐Partially SupportedDHT, testosterone, and DHEA bind to the androgen receptor, mediating their effects in both men and women.

◐Partially SupportedIn XX individuals with congenital adrenal hyperplasia, prenatal exposure to excess testosterone can lead to clitoral growth beyond typical size.

◐Partially SupportedThe hypothalamus exhibits plasticity throughout life.

◐Partially SupportedTestosterone administration in men leads to subjective improvements in mood, energy, libido, and overall well-being.

◐Partially SupportedAnabolic steroid use can lead to hypersexuality.

◐Partially SupportedElective surgery on infants for gender-related conditions should be delayed until they can provide informed consent.

◐Partially SupportedFor straight men, there is a ratio of approximately 105 older brothers to 100 older sisters.

◐Partially SupportedThe brain, including the hypothalamus, remains plastic throughout an individual's life.

◐Partially SupportedThe human brain continues its fetal rate of growth until at least age six to ten, unlike chimpanzee brains.

◐Partially SupportedHuman brain development from birth to age 12 is as rapid as prenatal development.

◐Partially SupportedIntervention is not necessary for individuals with low-normal testosterone levels who feel good and are functioning well, as increasing testosterone could lead to negative effects.

◐Partially SupportedThe hypothalamus and preoptic area may play a role in sexual orientation.

◐Partially SupportedPeople will answer personal questions and provide hand measurements anonymously for a $1 lottery scratcher ticket.

◐Partially SupportedHeterozygous advantage may exist for certain genes, similar to sickle cell anemia.

◐Partially SupportedTestosterone has a role in sexual preference, but it is not the sole determinant.

◐Partially SupportedHormones impact the amount of rough and tumble or social play that children engage in.

◐Partially SupportedBrain plasticity allows behaviors to impact androgen levels.

◐Partially SupportedDifferences in testosterone processing exist in the preoptic areas of gay and straight rams, similar to findings in gay and straight men.

◐Partially SupportedSynapses can form and disappear in various locations throughout the brain.

◐Partially SupportedGynandromorphs in birds result from the fusion of two embryos with different sex chromosomes.

◐Partially SupportedPeriods of high stress or androgen fluctuations during development can negatively impact androgen levels.

◐Partially SupportedAntagonistic relationships, like the flexor-extensor muscle pairs and hunger-satiety circuits, are a consistent theme in brain function.

◐Partially SupportedInfants identified with intersex variations historically often underwent cosmetic surgery to align their genitalia with typical female appearance, a practice many later regretted.

◐Partially SupportedTestosterone administration can restore mounting behavior in male species after its removal.

◐Partially SupportedNattokinase supplementation can help reduce LDL cholesterol.

✕Not SupportedCosmetic surgeries on intersex infants can result in anorgasmia due to loss of sensitive tissue.

◐Partially SupportedThe size of the intercal nucleus of the anterior hypothalamus (INAH3) may be related to sexual orientation, but causation is unclear.

◐Partially SupportedTestosterone drives plasticity in mounting behavior, as evidenced by the cessation of mounting in animals after a few weeks without testosterone, and its resumption after testosterone administration.

◐Partially SupportedThe adult hypothalamus remains sensitive to androgens, potentially driving significant changes in behavior and perception.

◐Partially SupportedIn birds, genetic sex of the brain drives local hormone production for sexual differentiation.

◐Partially SupportedLesbians, on average, have more masculine digit ratios than straight women.

◐Partially SupportedIndividuals with congenital adrenal hyperplasia are treated with oral adrenal steroids for life to normalize adrenal gland function and reduce testosterone output.

◐Partially SupportedIn male humans, there may be a pathway or molecule that acts as an aversive signal to sex with other men, suppressing desire and activating disgust.

◐Partially SupportedResearch has extensively detailed motor patterns in animal sexual behavior, but less is known about the motivational patterns crucial in human sexual behavior.

◐Partially SupportedHaving two defective copies of a gene, like in sickle cell anemia, leads to severe illness.

◐Partially SupportedNeurons controlling appetite suppression (POMC neurons) in the arcuate nucleus can become pro-hunger by expressing neuropeptide Y, indicating late-stage plasticity.

◐Partially SupportedExposure to the odors of a receptive female causes a spike in testosterone in male animals.

◐Partially SupportedExposure to prenatal testosterone may influence attraction to women later in life.

◐Partially SupportedTextbook descriptions of male and female sexual behavior in animals define distinct circuits: females have a brain-to-body circuit controlling lordosis (arching of the lower back and receptivity to mate), while males have a brain-to-spinal cord-to-body circuit involving arousal, erection, mounting, insertion, and ejaculation.

◐Partially SupportedCongenital adrenal hyperplasia is a condition present at birth where adrenal glands are slightly larger due to the fetus's inability to produce essential adrenal steroids.