Your search for "magnesium" revealed the following:

On Sale from £37.38 Regular price £50.00 Sale
Sale price £39.99 Regular price £50.00 Sale
Sale price £34.95 Regular price £40.00 Sale
Sale price £50.47 Regular price £70.00 Sale
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Sale price £129.86 Regular price £150.00 Sale
Sale price £217.96 Regular price £300.00 Sale