Live Amazon price · product details checked 5 September 2026
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fourfive Cordyceps Mushroom Supplement (4000mg) Performance Blend with sits on our vitamin b12 shelf, where the ranking comes from what buyers actually said rather than from what the box says. From the seller's own listing: Formulated with a blend of scientifically backed Cordyceps mushrooms in the powerful dose of 4000mg per capsule. Cordyceps is thought to support energy production and physical performance. That is the maker talking, not us, so read it as a claim rather than a finding. On Amazon it sits at 4.4 out of 5 across 41 ratings. How that compares with the rest of the shelf is below.
Across the 52 rated vitamin b12 products we track, the middle of the pack sits at 4.6 out of 5. This one scores 4.4. Bottom quarter of the shelf. Not a red flag by itself, but similar money buys a better-rated option here, so the case for this one has to come from somewhere else.
41 people rated it, where the shelf median is 764. That's a thin base for this shelf. A score from a small number of buyers can move a long way on a handful of new reviews, so treat it as a first impression rather than a settled verdict.
On money, this sits in the top third of a shelf running from £3.49 to £39.67, with the midpoint around £11.99. Paying above the middle of the shelf needs a reason the star rating does not supply, because on ratings alone the extra money is not buying an advantage here.
Worked out from the 52 vitamin b12 products we track, not from the brand's own claims. How we rank →
Taken from the product listing via Amazon's product API. These are the seller's claims, not our test results.
Short on time? Our best vitamin b12 supplement uk shortlist narrows this shelf down to a handful.
