Ashwagandha is part of the nightshade family, a group of plants that includes eggplants, tomatoes, and bell peppers. Nightshades are a common culprit of food sensitivities due to their high lectin content. Food sensitivity symptoms include bloating, headache, and digestive issues. If you have a food sensitivity to nightshades, you may not be able to tolerate ashwagandha. Food allergies are more severe than food sensitivities. Nightshade allergies are rare, but if you have history of food allergies or have experienced fever, rash, or other symptoms after consuming nightshades, you should avoid ashwagandha.
As with any supplement, consult with your physician before adding ashwagandha to your routine.