diff --git a/internal/ingress/annotations/parser/validators.go b/internal/ingress/annotations/parser/validators.go
index 3c724a3110..c6dccaa6e3 100644
--- a/internal/ingress/annotations/parser/validators.go
+++ b/internal/ingress/annotations/parser/validators.go
@@ -20,6 +20,7 @@ import (
 	"errors"
 	"fmt"
 	"regexp"
+	"slices"
 	"strconv"
 	"strings"
 	"time"
@@ -147,10 +148,8 @@ func ValidateOptions(options []string, caseSensitive, trimSpace bool) Annotation
 		if !caseSensitive {
 			s = strings.ToLower(s)
 		}
-		for _, option := range options {
-			if s == option {
-				return nil
-			}
+		if slices.Contains(options, s) {
+			return nil
 		}
 		return fmt.Errorf("value does not match any valid option")
 	}
diff --git a/internal/ingress/controller/certificate.go b/internal/ingress/controller/certificate.go
index 76aafec3cb..1b2383f306 100644
--- a/internal/ingress/controller/certificate.go
+++ b/internal/ingress/controller/certificate.go
@@ -19,6 +19,7 @@ package controller
 import (
 	"crypto/x509"
 	"net"
+	"slices"
 	"strings"
 	"unicode/utf8"
 )
@@ -40,10 +41,8 @@ func verifyHostname(h string, c *x509.Certificate) error {
 	if ip := net.ParseIP(candidateIP); ip != nil {
 		// We only match IP addresses against IP SANs.
 		// https://tools.ietf.org/html/rfc6125#appendix-B.2
-		for _, candidate := range c.IPAddresses {
-			if ip.Equal(candidate) {
-				return nil
-			}
+		if slices.ContainsFunc(c.IPAddresses, ip.Equal) {
+			return nil
 		}
 		return x509.HostnameError{Certificate: c, Host: candidateIP}
 	}
diff --git a/internal/ingress/controller/controller.go b/internal/ingress/controller/controller.go
index 0894c0dfc1..6cd6398164 100644
--- a/internal/ingress/controller/controller.go
+++ b/internal/ingress/controller/controller.go
@@ -18,6 +18,7 @@ package controller
 
 import (
 	"fmt"
+	"slices"
 	"sort"
 	"strconv"
 	"strings"
@@ -1568,11 +1569,9 @@ func mergeAlternativeBackend(ing *ingress.Ingress, priUps, altUps *ingress.Backe
 		return false
 	}
 
-	for _, ab := range priUps.AlternativeBackends {
-		if ab == altUps.Name {
-			klog.V(2).Infof("skip merge alternative backend %v into %v, it's already present", altUps.Name, priUps.Name)
-			return true
-		}
+	if slices.Contains(priUps.AlternativeBackends, altUps.Name) {
+		klog.V(2).Infof("skip merge alternative backend %v into %v, it's already present", altUps.Name, priUps.Name)
+		return true
 	}
 
 	if ing.ParsedAnnotations != nil && ing.ParsedAnnotations.SessionAffinity.CanaryBehavior != "legacy" {
diff --git a/pkg/apis/ingress/types_equals.go b/pkg/apis/ingress/types_equals.go
index 6fba3bd453..19d71f0bb1 100644
--- a/pkg/apis/ingress/types_equals.go
+++ b/pkg/apis/ingress/types_equals.go
@@ -18,6 +18,7 @@ package ingress
 
 import (
 	"k8s.io/ingress-nginx/pkg/util/sets"
+	"slices"
 )
 
 // Equal tests for equality between two Configuration types
@@ -64,13 +65,7 @@ func (c1 *Configuration) Equal(c2 *Configuration) bool {
 	}
 
 	for _, ptb1 := range c1.PassthroughBackends {
-		found := false
-		for _, ptb2 := range c2.PassthroughBackends {
-			if ptb1.Equal(ptb2) {
-				found = true
-				break
-			}
-		}
+		found := slices.ContainsFunc(c2.PassthroughBackends, ptb1.Equal)
 		if !found {
 			return false
 		}