You could use a macro like:
Code:
Sub Demo()
Application.ScreenUpdating = False
Dim Rng As Range
With ActiveDocument.Range
With .Find
.ClearFormatting
.Replacement.ClearFormatting
.Text = "Nutrition"
.Replacement.Text = ""
.Forward = True
.Format = True
.Style = "Heading 4"
.Wrap = wdFindStop
.MatchCase = True
.MatchWholeWord = False
.MatchWildcards = False
.MatchSoundsLike = False
.MatchAllWordForms = False
.Execute
End With
Do While .Find.Found
Set Rng = .Duplicate
Set Rng = Rng.GoTo(What:=wdGoToBookmark, Name:="\HeadingLevel")
Rng.Delete
.Collapse wdCollapseEnd
.Find.Execute
Loop
End With
Application.ScreenUpdating = True
End Sub
For PC macro installation & usage instructions, see:
http://www.gmayor.com/installing_macro.htm
For Mac macro installation & usage instructions, see:
https://wordmvp.com/Mac/InstallMacro.html