Shampoo, conditioner, styling tools and hair treatments, pulled from Amazon and UK retailers and checked against their own price history rather than a headline discount. If a listing has dropped below its last few months of pricing, that's a real deal; if it's just back to its usual price with a bigger 'was' number, the chart on the deal page will show that too.
Each deal links to its own price history chart, so you can check where the current price sits against recent months before buying.
Mostly Amazon, with some from other UK retailers we track.
As new deals are posted and old ones expire, so check back regularly rather than bookmarking a specific list of products.