DHEA
Dehydroepiandrosterone (DHEA)
DHEA (Dehydroepiandrosterone) is an endogenous adrenal steroid hormone and the most abundant circulating steroid in the human body, serving as a precursor to both androgens and estrogens. It is primarily used as an anti-aging supplement to counteract the dramatic age-related decline in DHEA levels (peaking in the 20s and falling ~80% by age 70), and is also studied for adrenal insufficiency, depression, sexual dysfunction, and bone density support. Clinical use is most evidence-based in postmenopausal women with adrenal insufficiency and in intravaginal formulations for vulvovaginal atrophy.
Mechanism of Action
DHEA acts as a prohormone that is peripherally converted to androgens (testosterone, androstenedione) and estrogens (estradiol, estrone) via tissue-specific steroidogenic enzymes, allowing localized hormonal activity without large systemic sex hormone elevations. It also binds directly to sigma-1 receptors, GABA-A receptors, and nuclear hormone receptors (including PPAR-alpha), exerting neurosteroid, anti-glucocorticoid, and immune-modulatory effects independent of its conversion to sex steroids. Additionally, DHEA modulates insulin sensitivity, inflammatory cytokine production, and nitric oxide synthesis, contributing to its broad reported effects on metabolic and cardiovascular health.
Evidence by Health Goal(18 goals)
Dosing Protocols
Morning, with or without food
Cycle: Monitor labs every 3-6 months; continuous use common in adults over 40
Start at 25mg to assess tolerance and hormonal response before increasing. Doses above 50mg increase risk of androgenic and estrogenic side effects. Testing baseline DHEA-S levels before supplementing is strongly recommended.
Morning application to inner wrist, forearm, or thigh
Transdermal delivery may produce a more favorable DHEA-S to DHEA ratio with less hepatic first-pass conversion. Creams and gels typically provide 5-10mg per pump or measured dose; verify concentration before dosing.
Intravaginal administration at bedtime
FDA-approved prasterone (Intrarosa) is indicated specifically for dyspareunia due to vulvovaginal atrophy in postmenopausal women. This route produces minimal systemic absorption and is distinct from general supplementation use.
Safety & Side Effects
DHEA has a generally acceptable short-term safety profile at doses of 25-50mg in adults over 40, but its conversion to active sex hormones means long-term use carries real risks related to androgen and estrogen excess, particularly in younger individuals or those with hormone-sensitive conditions. DHEA is an unregulated OTC supplement in the United States but is a controlled or prescription substance in Canada, the UK, and most of Europe; individuals with a history of hormone-sensitive cancers (breast, prostate, ovarian) should avoid use without oncologic guidance.
Possible Side Effects
- !Acne and oily skin, particularly at doses above 50mg daily
- !Facial hair growth and mild virilization in women
- !Irritability, mood changes, or increased aggression
- !Hair thinning or androgenic alopecia in genetically predisposed individuals
- !Elevated estrogen levels leading to gynecomastia or breast tenderness
- !Menstrual irregularities or cycle disruption in premenopausal women
- !Hepatotoxicity risk with long-term high-dose oral use (rare but documented)
- !Potential worsening of hormone-sensitive conditions (e.g., PCOS, endometriosis)
Interactions
- -May reduce the efficacy of antiestrogen therapies (e.g., tamoxifen, aromatase inhibitors) by increasing estrogenic activity
- -Can enhance or oppose corticosteroid effects due to anti-glucocorticoid activity - use caution with prednisone or hydrocortisone therapy
- -May increase testosterone levels when combined with other testosterone-boosting supplements (tribulus, ashwagandha), elevating androgenic side effect risk
- -Possible interaction with insulin and oral hypoglycemics - DHEA may modestly improve insulin sensitivity and alter glucose regulation
- -May interact with anticoagulants such as warfarin by influencing hepatic CYP enzyme activity - monitor INR if combined
Cost & Where to Buy
OTC oral DHEA is widely available and inexpensive in the US, with 25-50mg capsules from reputable brands (Life Extension, Jarrow, NOW Foods) costing $8-20/month. Pharmaceutical-grade transdermal preparations or compounded creams from specialty pharmacies cost $20-50/month. FDA-approved intravaginal prasterone (Intrarosa) requires a prescription and can exceed $300/month without insurance.
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