I started getting gout attacks a few years ago - eventually I realised it was always the day after my wife and I ate in our favourite restaurant (Thai). First I thought it was the bottle of wine we shared but when we skipped the wine I still got the gout. Then I stopped eating the oyster sauce and haven't had any more gout attacks.
 
Sue’s comment:  What’s in oyster sauce?  In Maggi brand, one of the main ingredients is flavour enhancers (621,635) and oyster extract forms only 0.4% of the product. Flavour enhancer 635 is strongly linked to gout. See Gout factsheet

1530oyster  INGREDIENTS: Water, Sugar, Salt, Thickener (1422), Flavour Enhancers (621, 635), Yeast Extract, Flavours (Crustacean, Fish, Soy), Food Acid (Citric), Colour (150c), Oyster Extract (0.4%), Preservative (202).