Elderberry

Reasonable short-course immune herb with supportive flu-like symptom data, though it should not be oversold as antiviral magic.

A rough internal score reflecting quantity, quality, and consistency of human evidence. Not a clinical recommendation.

Small trials and reviews suggest elderberry may reduce duration or severity of viral upper-respiratory symptoms. Most evidence uses standardized syrups or extracts rather than homemade preparations.

• May modestly reduce flu-like symptom burden
• Provides anthocyanins and polyphenols
• Often useful as a short-term seasonal product

Most products use syrup, lozenge, or extract dosing during acute respiratory symptoms for several days.

• GI upset
• Nausea
• Problems with improperly prepared raw berry products

Raw berries, leaves, and stems are not safe to eat because they contain cyanogenic compounds. People with autoimmune disorders sometimes prefer caution.

Most human studies are small, short, or use standardized extracts rather than the raw herb.

• Immunity50
• Recovery25