The side effects of ashwagandha tend to be minimal. But it may have negative effects on your liver. It may also cause drowsiness and gastrointestinal troubles, like
Diarrhea
Vomiting
Nausea
In addition, ashwagandha can increase thyroid activity. So, it shouldn’t be used if you have borderline thyroid or hyperthyroidism.
Ashwagandha may contribute to uterine contractions, too. The risk is considered low, but it’s not recommended during pregnancy.
Should you take ashwagandha supplements?
Is ashwagandha safe? It may be for some people, as long as you follow some precautions.
Dr. Lin advises:
Taking a reasonable dosage: Stick to no more than 500 milligrams twice a day, or as recommended by a knowledgeable healthcare professional.
Opting for tested ashwagandha supplements: Look for supplements that have been independently verified by an outside company, such as ConsumerLab, United States Pharmacopeia (USP) or NSF International.
Using it in the short term: Ashwagandha is usually well tolerated for about three to six months. But its long-term safety hasn’t been well studied.
Pursuing other treatments as well: Ashwagandha should be considered a complementary practice, not as an alternative to tried-and-true treatments and medications.
Talking with a healthcare provider: Always consult a healthcare provider before taking supplements.
Ashwagandha isn’t considered safe for everyone. In fact, the potential for risks in certain people has led to ashwagandha being banned in Denmark. Don’t take ashwagandha if you:
Are pregnant or breastfeeding
Take certain medications, including medications for diabetes, high blood pressure, sleep, anxiety, seizures or autoimmune conditions
Have an autoimmune disease
Have prostate cancer
Will soon have surgery
Have a thyroid condition, like hyperthyroidism (overactive thyroid), hypothyroidism (underactive thyroid) or borderline thyroid
Overall, ashwagandha may have some mind- and body-boosting benefits — but it’s not magic.
If stress, anxiety and sleep troubles are getting in the way of you living your best life, supplements shouldn’t be your first line of defense.