The benefit of getting the deal from Amazon is free delivery. You get free standard delivery on a regular account, and free next-day delivery with Amazon Prime (sign up for a free 30-day trial of Amazon Prime). 23andMe charges £9.99 for standard shipping.
The 50% discount is the biggest discount we've seen in a while – and we would know since we're constantly trawling for the best DNA kit deals.
Amazon's offer is one of thousands available right now as a part of its early Black Friday sale which ends 19 November. While many of the discounts are on small-ticket stocking-stuffers, like 33% off Tile trackers, there are a few eye-catching discounts on high-value products too, like the OnePlus 8 and OnePlus Nord phones.