EXTRACT

Rating

Description

A+

• very strong clinical evidence

A-

• strong clinical evidence

B+

• very good clinical evidence or
• very widespread and validated traditional use

- supported by good clinical evidence or

• exceptionally valued and validated traditional use

B-

• good clinical evidence or
• very widespread and validated traditional use

- supported by moderate clinical evidence

C+

• moderate clinical evidence or
• very widespread traditional use

- supported by variable evidence

C-

• variable clinical evidence or
• very widespread and validated traditional use

D+

• modest clinical evidence or
• very widespread traditional use

D-

• some clinical or laboratory evidence or
• widespread traditional use

E+

• modest scientific evidence or
• recognised traditional use

E-

• laboratory or anecdotal evidence only (limited clinical relevance)

F

• limited laboratory or anecdotal evidence only (no clinical relevance)