Table 5.

Ashwagandha’s effects on thyroid gland—a summary of the studies.

Authors	Characteristic of the Group	Ashwagandha Formulation Characteristics	Duration of the Observation	Results	References
Sharma et al.	males and females, 18–50 years old, with subclinical hypothyroidism	300 mg of Ashwagandha root extract twice a day; oral administration	8 weeks of treatment	↑ T3 ↑ T4 ↓ TSH	[13]
Abdel-Wahhab et al.	male albino rats with induced hypothyroidism	500 mg/kg/day of Ashwagandha methanolic extract; oral administraion	30 days	↑ T3 ↑ fT3 ↑ T4 ↑ fT4 ↓ TSH	[57]
Ibrahim et al.	male Wistar albino rats with induced hypothyroidism	50 mg/kg/day of Ashwagandha extract; oral administraion	30 days	↑ T3 ↑ T4 ↓ TSH	[58]