What doing this looks like in practice: what you obtain, how it is taken, and what the first year typically involves.
Read the wiki thoroughly and spend time in the community before spending a penny. The accumulated wisdom of thousands of careful self-treaters is there freely — the questions you haven't thought of yet have already been asked and answered many times over.
Bring this to your doctor or specialist before beginning. The Clinician Packet on this site generates a personalised brief for your specific condition and history. Some physicians will actively monitor; others will at least consent to watch. A few will not — and that is information too.
Four organisms are used therapeutically. For autoimmune and inflammatory conditions, hookworm (NA) is the most widely used. For the sensitive, the cautious, or for children, the transient rat tapeworm (HDC) is often the first choice. A small number of vetted, non-profiteering providers supply these. It is not inexpensive, and insurance covers none of it.
The community established early on that initial dose matters greatly. Moving too fast produces side effects that can obscure any benefit. The specifics — starting amount, timing of supplementary doses — are documented on the wiki and within the self-treatment community.

What a first year with NA — the most widely used organism — typically looks like. Individual experience varies considerably.
Larvae are applied to the skin of the forearm on a small patch and left for thirty minutes, then removed. A patch of redness or mild itch at the site is normal.
Larvae travel through the bloodstream into the lungs, then down to the small intestine — following an evolutionary path. Fatigue, digestive upset, and mild respiratory symptoms are common and dose-dependent.
As worms settle, many people experience a short period of noticeably reduced symptoms — calm, focus, improved wellbeing. It is real and temporary. Do not adjust medications on its strength.
Worms complete maturation around day 22. Digestive and fatigue symptoms may continue intermittently. For allergy and asthma, symptoms can temporarily worsen before beginning to ease.
Consistent improvement begins to emerge. Allergies and asthma often respond between weeks 11 and 13. Supplementary dosing is sometimes considered after week 12.
Supplementary doses every six to twelve months maintain the colony. Some people see no benefit until month twelve or beyond. Community experience spanning nearly two decades is on the wiki.
A calm, specific conversation travels further than a stack of printouts. These are fair questions to raise — and to listen to the answers.