Your search for "magnesium" revealed the following:

Sale price £47.75 Regular price £70.00 Sale
On Sale from £70.50 Regular price £90.00 Sale
Sale price £49.50 Regular price £70.00 Sale
Sale price £74.08 Regular price £90.00 Sale
Sale price £90.25 Regular price £130.00 Sale
On Sale from £127.91 Regular price £150.00 Sale
Sale price £14.99 Regular price £22.00 Sale
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Sale price £89.95 Regular price £130.00 Sale
Sale price £60.35 Regular price £90.00 Sale