diff --git a/journal/src/helpers.rs b/journal/src/helpers.rs
index 367079a..d94ff19 100644
--- a/journal/src/helpers.rs
+++ b/journal/src/helpers.rs
@@ -1,25 +1,5 @@
 use crate::types::{CustomUnitIngestionDose, StandardIngestionDose};
 
-pub fn calculate_standard_deviation(
-	expectation_x: f64,
-	standard_deviation_x: f64,
-	expectation_y: f64,
-	standard_deviation_y: f64,
-) -> Option<f64> {
-	let sum_x = standard_deviation_x.powi(2) + expectation_x.powi(2);
-	let sum_y = standard_deviation_y.powi(2) + expectation_y.powi(2);
-
-	let expectations = expectation_x.powi(2) * expectation_y.powi(2);
-
-	let product_variance = (sum_x * sum_y) - expectations;
-	println!("{} {} {} {}", sum_x, sum_y, expectations, product_variance);
-	if product_variance > 0.0000001 {
-		Some((product_variance.sqrt() * 100.0).round() / 100.0)
-	} else {
-		None
-	}
-}
-
 pub fn calulate_custom_unit_ingestion_dose(
 	dose: &CustomUnitIngestionDose,
 	custom_unit_dose: &CustomUnitIngestionDose,