Your search for "magnesium" revealed the following:

Sale price £159.00 Regular price £309.16 Sale
Sale price £74.95 Regular price £90.00 Sale
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Sale price £89.07 Regular price £130.00 Sale
Sale price £37.90 Regular price £50.00 Sale
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Sale price £89.90 Regular price £130.00 Sale
Sale price £96.65 Regular price £130.00 Sale
On Sale from £113.90 Regular price £130.00 Sale