diff --git a/source/common/http/header_utility.cc b/source/common/http/header_utility.cc
index 527bd05f52af1..e504a21ad8a23 100644
--- a/source/common/http/header_utility.cc
+++ b/source/common/http/header_utility.cc
@@ -210,17 +210,6 @@ bool HeaderUtility::requestShouldHaveNoBody(const RequestHeaderMap& headers) {
            headers.Method()->value() == Http::Headers::get().MethodValues.Connect));
 }
 
-void HeaderUtility::addHeaders(HeaderMap& headers, const HeaderMap& headers_to_add) {
-  headers_to_add.iterate([&headers](const HeaderEntry& header) -> HeaderMap::Iterate {
-    HeaderString k;
-    k.setCopy(header.key().getStringView());
-    HeaderString v;
-    v.setCopy(header.value().getStringView());
-    headers.addViaMove(std::move(k), std::move(v));
-    return HeaderMap::Iterate::Continue;
-  });
-}
-
 bool HeaderUtility::isEnvoyInternalRequest(const RequestHeaderMap& headers) {
   const HeaderEntry* internal_request_header = headers.EnvoyInternalRequest();
   return internal_request_header != nullptr &&
diff --git a/source/common/http/header_utility.h b/source/common/http/header_utility.h
index e84f38ed5347b..20719003733c2 100644
--- a/source/common/http/header_utility.h
+++ b/source/common/http/header_utility.h
@@ -153,13 +153,6 @@ class HeaderUtility {
 
   static bool requestShouldHaveNoBody(const RequestHeaderMap& headers);
 
-  /**
-   * Add headers from one HeaderMap to another
-   * @param headers target where headers will be added
-   * @param headers_to_add supplies the headers to be added
-   */
-  static void addHeaders(HeaderMap& headers, const HeaderMap& headers_to_add);
-
   /**
    * @brief a helper function to determine if the headers represent an envoy internal request
    */
diff --git a/source/extensions/filters/http/ratelimit/ratelimit.cc b/source/extensions/filters/http/ratelimit/ratelimit.cc
index 07c11b088e2d0..d97b6ea489cbb 100644
--- a/source/extensions/filters/http/ratelimit/ratelimit.cc
+++ b/source/extensions/filters/http/ratelimit/ratelimit.cc
@@ -193,7 +193,7 @@ void Filter::complete(Filters::Common::RateLimit::LimitStatus status,
     if (response_headers_to_add_ == nullptr) {
       response_headers_to_add_ = Http::ResponseHeaderMapImpl::create();
     }
-    Http::HeaderUtility::addHeaders(*response_headers_to_add_, *rate_limit_headers);
+    Http::HeaderMapImpl::copyFrom(*response_headers_to_add_, *rate_limit_headers);
   } else {
     descriptor_statuses = nullptr;
   }
@@ -255,14 +255,14 @@ void Filter::populateResponseHeaders(Http::HeaderMap& response_headers, bool fro
     if (from_local_reply && !response_headers_to_add_->getContentTypeValue().empty()) {
       response_headers.remove(Http::Headers::get().ContentType);
     }
-    Http::HeaderUtility::addHeaders(response_headers, *response_headers_to_add_);
+    Http::HeaderMapImpl::copyFrom(response_headers, *response_headers_to_add_);
     response_headers_to_add_ = nullptr;
   }
 }
 
 void Filter::appendRequestHeaders(Http::HeaderMapPtr& request_headers_to_add) {
   if (request_headers_to_add && request_headers_) {
-    Http::HeaderUtility::addHeaders(*request_headers_, *request_headers_to_add);
+    Http::HeaderMapImpl::copyFrom(*request_headers_, *request_headers_to_add);
     request_headers_to_add = nullptr;
   }
 }
diff --git a/test/common/http/header_utility_test.cc b/test/common/http/header_utility_test.cc
index 7664aaee4c80a..a529f7011b010 100644
--- a/test/common/http/header_utility_test.cc
+++ b/test/common/http/header_utility_test.cc
@@ -687,7 +687,7 @@ TEST(HeaderAddTest, HeaderAdd) {
   TestRequestHeaderMapImpl headers{{"myheader1", "123value"}};
   TestRequestHeaderMapImpl headers_to_add{{"myheader2", "456value"}};
 
-  HeaderUtility::addHeaders(headers, headers_to_add);
+  HeaderMapImpl::copyFrom(headers, headers_to_add);
 
   headers_to_add.iterate([&headers](const Http::HeaderEntry& entry) -> Http::HeaderMap::Iterate {
     Http::LowerCaseString lower_key{std::string(entry.key().getStringView())};