diff --git a/src/ReverseMarkdown.Test/ConverterTests.WhenTableRowWithDuplicateStyleKeysAfterTrimming_ThenConvertWithoutException.verified.md b/src/ReverseMarkdown.Test/ConverterTests.WhenTableRowWithDuplicateStyleKeysAfterTrimming_ThenConvertWithoutException.verified.md
new file mode 100644
index 0000000..6651f7c
--- /dev/null
+++ b/src/ReverseMarkdown.Test/ConverterTests.WhenTableRowWithDuplicateStyleKeysAfterTrimming_ThenConvertWithoutException.verified.md
@@ -0,0 +1,3 @@
+| Header |
+| --- |
+| Data |
diff --git a/src/ReverseMarkdown.Test/ConverterTests.cs b/src/ReverseMarkdown.Test/ConverterTests.cs
index 5692ada..ee0d594 100644
--- a/src/ReverseMarkdown.Test/ConverterTests.cs
+++ b/src/ReverseMarkdown.Test/ConverterTests.cs
@@ -1971,5 +1971,12 @@ public Task WhenTable_WithCaptionContainingNewlines_ThenHandleNewlines()
             var html = $"<table><caption>Multi{Environment.NewLine}Line{Environment.NewLine}Caption</caption><tr><th>Col</th></tr><tr><td>Data</td></tr></table>";
             return CheckConversion(html);
         }
+
+        [Fact]
+        public Task WhenTableRowWithDuplicateStyleKeysAfterTrimming_ThenConvertWithoutException()
+        {
+            var html = "<table><tr><th style=\"font-size:12px; font-family:Work Sans; font-size:14px; font-size:14px\">Header</th></tr><tr><td>Data</td></tr></table>";
+            return CheckConversion(html);
+        }
     }
 }
diff --git a/src/ReverseMarkdown/Helpers/StringUtils.cs b/src/ReverseMarkdown/Helpers/StringUtils.cs
index 365a8df..8927e4b 100644
--- a/src/ReverseMarkdown/Helpers/StringUtils.cs
+++ b/src/ReverseMarkdown/Helpers/StringUtils.cs
@@ -64,7 +64,8 @@ public static Dictionary<string, string> ParseStyle(string? style)
         var styles = style!.Split(';');
         return styles.Select(styleItem => styleItem.Split(':'))
             .Where(styleParts => styleParts.Length == 2)
-            .DistinctBy(styleParts => styleParts[0])
-            .ToDictionary(styleParts => styleParts[0].Trim(), styleParts => styleParts[1].Trim(), StringComparer.OrdinalIgnoreCase);
+            .Select(styleParts => new[] { styleParts[0].Trim(), styleParts[1].Trim() })
+            .DistinctBy(styleParts => styleParts[0], StringComparer.OrdinalIgnoreCase)
+            .ToDictionary(styleParts => styleParts[0], styleParts => styleParts[1], StringComparer.OrdinalIgnoreCase);
     }
 }