Supplement analysis backed by scientific evidence · PT

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Limited evidenceStress & mood

Adrenal Support Formulas

Adrenal fatigue is not a recognized medical condition, and a systematic review of 58 studies concluded it does not exist. Worse, testing of over-the-counter adrenal support products found all of them contained thyroid hormone and most contained steroid hormones that were nowhere on the label.

What the science says

  • Adrenal fatigue has no diagnostic basis Strong evidence

    A systematic review of 58 studies examining cortisol and HPA-axis measures in fatigued populations found no consistent evidence that adrenal exhaustion causes fatigue, and no validated test — including the salivary cortisol panels sold alongside these products — distinguishes adrenal fatigue from ordinary tiredness. The authors concluded the entity does not exist. Genuine adrenal insufficiency (Addison disease, secondary hypoadrenalism) is a real, testable, treatable diagnosis requiring prescription glucocorticoids.

  • Products contain undeclared hormones Strong evidence

    An analysis of twelve over-the-counter adrenal support supplements found all twelve contained detectable thyroid hormone, and most contained one or more steroid hormones — pregnenolone, DHEA, androstenedione, cortisone or hydrocortisone — with none of it stated on the label. Chronic unlabeled glucocorticoid exposure can suppress the HPA axis, causing the very adrenal problem the product claims to fix.

  • Adaptogens have modest, real anti-stress effects — as single ingredients Moderate evidence

    Meta-analyses of ashwagandha (Withania somnifera) at 250-600 mg/day of root extract report reductions in perceived stress and anxiety scales and modest decreases in morning cortisol over 6-12 weeks. That is a genuine effect, but it is a stress-perception effect, not restoration of an exhausted gland, and ashwagandha can be bought alone for a fraction of the price.

  • Glandulars and licorice add risk without evidence Limited evidence

    Bovine adrenal cortex extract has no controlled human efficacy data and is a plausible route for hormone contamination. Licorice root, present in most formulas at 100-500 mg, is included precisely because glycyrrhizin prolongs cortisol half-life — a pharmacological effect with real cardiovascular consequences, not a nutritive one.

Dosage & safety

Studied doseNo dose is recommended for these blends. Typical labels: bovine adrenal glandular 100-500 mg, licorice root 100-500 mg, vitamin C 500-1,000 mg, pantothenic acid (B5) 100-500 mg, ashwagandha 300-600 mg, rhodiola 200-400 mg, holy basil 300 mg. If the goal is stress and sleep, the evidence-supported single agents are ashwagandha root extract 300-600 mg/day for 8 weeks, or rhodiola 200-400 mg/day. Persistent fatigue warrants testing for anemia, thyroid disease, sleep apnea, depression and, where clinically indicated, a morning cortisol or ACTH stimulation test.
SafetyUndeclared glucocorticoids can suppress the HPA axis and cause Cushingoid features, and abruptly stopping after months of use can precipitate adrenal crisis — a medical emergency. Undeclared thyroid hormone causes thyrotoxicosis, palpitations and atrial fibrillation. Licorice/glycyrrhizin above roughly 100 mg/day causes pseudohyperaldosteronism: hypertension, hypokalemia, edema and, in case reports, arrhythmia and rhabdomyolysis — avoid entirely with hypertension, heart failure, kidney disease, diuretics or digoxin. DHEA and pregnenolone are androgen precursors, are banned by WADA, and are contraindicated in hormone-sensitive cancers and pregnancy. Ashwagandha has accumulating case reports of drug-induced liver injury and is contraindicated in pregnancy, in autoimmune thyroid disease, and alongside sedatives. Anyone taking prescribed corticosteroids should avoid this category outright.

Scientific references

Where to buy

Double Wood Supplements, Adrenal Support, 1 fl oz (30 ml)

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