diff --git a/journal/src/journal/json_journal.rs b/journal/src/journal/json_journal.rs
index 08a5ebe..ea21989 100644
--- a/journal/src/journal/json_journal.rs
+++ b/journal/src/journal/json_journal.rs
@@ -83,8 +83,6 @@ impl Journal for JSONJournal {
 		self.data.sustenances.get(sustenance_id).cloned()
 	}
 
-	// TODO: make error when substance depends on itself
-	// maybe track the IDs of sustenances visited as a mutable array?
 	fn get_ingestion_kinds(&self, kind: &IngestionKind, calculate: bool) -> Option<IngestionKinds> {
 		println!("{kind:#?}");
 		let mut kinds: IngestionKinds = IngestionKinds::from(kind);