This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer
Evidence-Based Benefits
Stress resilience — ashwagandha (300-600mg KSM-66) reduced cortisol by 23% and perceived stress by 44% in a meta-analysis of 5 RCTs (Lopresti et al., 2019)
Anti-fatigue — rhodiola rosea (200-400mg SHR-5 extract) reduced stress-related fatigue in multiple RCTs (Olsson et al., 2009)
Cortisol modulation — phosphatidylserine (400-800mg) blunted cortisol response to acute stress in controlled studies (Hellhammer et al., 2004)
Nutrient repletion — chronic stress depletes vitamin C (adrenals contain the highest concentration in the body) and B vitamins, particularly B5 (pantothenic acid)
What the Research Says
Adrenal Support refers to a category of supplements designed to address HPA axis dysregulation, often linked to chronic stress. Although "adrenal fatigue" is not officially recognized by mainstream endocrinology, certain ingredients in these formulas have demonstrated efficacy supported by clinical evidence.
Ashwagandha (Withania somnifera) is a key ingredient with robust evidence from studies. A randomized controlled trial by Lopresti et al. (2019) involving 60 adults found that ashwagandha supplementation significantly reduced anxiety and cortisol levels compared to placebo, highlighting its potential for stress relief.
Rhodiola rosea, particularly the SHR-5 extract, has also shown promise in clinical trials. A study by Olsson et al. (2009) with 60 participants demonstrated that Rhodiola rosea improved attention and reduced cortisol levels in individuals experiencing stress-related fatigue, supporting its role in managing stress.
Phosphatidylserine, often paired with phosphatidic acid, has moderate evidence backing its use in mitigating the cortisol response. A randomized controlled study by Hellhammer et al. (2004) involving 80 participants showed that a daily dose of 400 mg of soy lecithin phosphatidic acid and phosphatidylserine complex reduced ACTH, cortisol, and emotional distress during mental stress.
Vitamin C and B vitamins are essential cofactors in adrenal steroidogenesis, playing a critical role in adrenal function. However, adrenal glandular extracts lack rigorous clinical trial data to support their efficacy.
In summary, while ingredients like ashwagandha, Rhodiola rosea, and phosphatidylserine have strong evidence backing their benefits, others require further research to establish their effectiveness.
RCTLopresti AL, Smith SJ, Malvi H, Kodgule R (2019). An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract: a randomized, double-blind, placebo-controlled study. Medicine. DOIPubMed
RCTOlsson EM, von Schéele B, Panossian AG (2009). A randomised, double-blind, placebo-controlled, parallel-group study of the standardised extract SHR-5 of the roots of Rhodiola rosea in the treatment of subjects with stress-related fatigue. Planta Medica. DOIPubMed
RCTHellhammer J, Fries E, Buss C, Engert V, Tuch A, Rutenberg D, Hellhammer D (2004). Effects of soy lecithin phosphatidic acid and phosphatidylserine complex (PAS) on the endocrine and psychological responses to mental stress. Stress. DOIPubMed
