I've read that your body typically becomes more sensitive to urushiol each time you come in contact with it and the reactions/rash gets worse. Your friends claim suggests the opposite.I have a friend who works for Asplundh in Western Oregon where he is frequently exposed to poison oak. He claims to have become immune to the allergic reaction by micro-dosing early growth leaves that he grinds up and steeps in a tea.
" How urushiol sensitivity works
- Immune system response:
The rash isn't caused by the urushiol itself, but by the body's immune response to it. When urushiol penetrates the skin, it binds to skin proteins and triggers an allergic reaction.
- T-cell activation:
The immune system's T-cells mistakenly identify the urushiol-protein complex as a foreign substance. They send out inflammatory signals, causing the classic symptoms of itching, redness, and blisters.
- Developing sensitivity:
Most people are not allergic the first time they are exposed. Repeated exposure can increase the likelihood of developing an allergy and a more severe reaction later on.
- Changes over a lifetime:
Sensitivity can change over a person's lifetime. It is possible for someone who believes they are immune to develop a rash later in life.
Why you shouldn't try to build immunity
- Myth of developing immunity:
There is no reliable, safe way to build immunity to poison ivy. The idea that you can become immune by eating or repeatedly exposing yourself to the plant is a myth.
- Increased risk:
Deliberately increasing exposure to urushiol can increase your risk of developing a severe allergic reaction.
- Risk of severe reaction:
The allergic reaction can be severe, and attempts to build tolerance could lead to an even worse response. "