Natto is generally well-tolerated, but as with any supplement, some individuals may experience mild side effects, including:
1 Digestive Discomfort – Such as bloating, nausea, or mild stomach upset, especially if taken on an empty stomach.
2. Headaches – Temporary headaches may occur as the body adjusts to enhanced cellular processes.
3. Fatigue or Drowsiness – Rare but possible during the initial adjustment period.
4. Allergic Reactions – Rare cases of itching or rash may occur if sensitive to any ingredient.
If side effects persist, discontinue use and consult your healthcare provider.