Has any member witnessed any adverse effects in humans through use of the comfrey herb?

I have just joined this silly game. I have seen the effects (external use) of Comfrey. Why the drama? What is the actual evidence, not a government edict?

I am from Australia, and we have the same legislative problem. But there appears that LITTLE/NOTHING CONCRETE is known about Comfrey medicinal effects; FEAR RULES, and NO APPROPRIATE RESEARCH IS HAPPENING: hence negative legislation (OK better to be safe than sorry).

What is happening in the US in this sphere?

I ask because Comfrey has provided some great skin cures for me. However, some sites (some from this source) tell me I am in danger. Can it be verified with actual case histories?

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I am not a "health professional". I am a professional scientist (physicist) and was a professor in Australia and Scandinavia for 15 years. Now, I am a senior government scientist in Australia. The whole negative Comfrey thing seems to lack scientific credibility: it is an edict not a scientifically supported case (as presented on this website and elsewhere). Please can someone give me scientific evidence, not just passed legislated regulation or advice (and why)?

Comfrey worked for and I am not dead. I took internally several times to test reaction (someone has to be courageous to do it). I am not dead or having liver/kidney failure. I will not continue with ingestion of Comfrey until proper medical tests are carried out. I will continue to use this herb for external treatment, as it is most exceptional in providing rapid and effective results.

Best Regards to All

Dr Mike Middleton
Perth, Australia