Hi Anna,

Never tried it myself, but I used to know an old naturopath in Germany who used potentized blood from the patient. She had particular success with allergies, hayfever, etc.
She would take a drop of blood from the finger (just a little prick like you would do for a glucose test) and potentized it with water/alcohol. I think she prepared C potencies.
Caution has to be taken with repetition, apparently you can get nasty aggravations.

Urine was a popular folk rx in Germany when some 8 years ago a couple of books came out. I have used a baby's urine on the skin for eczema. It's sterile and seems to be more soothing than a lot of other things.

Hope this helps.

Kind regards,
Karin