Is butterfat OK with BAM?

No, and here is why

Butterfat carries roughly 99 g of fat per 100 g. Bile acid malabsorption is a question of how much fat arrives at once rather than of any single ingredient, so Munchable reads the fat figure off the label first and uses it whenever it is there. Where a label gives no fat figure, it reads the ingredients list instead, and an ingredient as fat-dense as butterfat is treated as an avoid when it is one of the main ingredients, and a caution further down the list.

On a real product, the reason Munchable shows reads: butterfat is a main ingredient and carries around 99 g fat per 100 g, with no fat figure on the label

What Munchable checks for Bile acid malabsorption

• Total fat per serving, using the pack’s own serving size where it gives one
• Fat per 100 g as a fallback, flagged as such so you know the basis
• Fat-dense ingredients where the label reports no fat at all: oils, butter and other rendered fats, cream, nut and seed butters, nuts, seeds, coconut, cheese, cured fatty meats, chocolate and pastry
• Where each of those sits on the ingredients list, so a main ingredient outranks a trace
• A "can’t assess" verdict where a pack gives neither a fat figure nor a fat-dense ingredient, never a green light

The full reasoning, and the evidence behind it, is in the Bile acid malabsorption guide.

Other ingredients Munchable flags for Bile acid malabsorption

• Almond
• Almond butter
• Animal fat
• Bacon
• Beef tallow
• Brazil nut
• Butter
• Cheese
• Chia seed
• Chocolate
• Chorizo
• Clarified butter

The catch with reading labels yourself

Knowing that butterfat is a problem is the easy part. Finding it is the hard part: it hides behind wordings that do not look like it, it matters more near the top of the list than the bottom, and a product you have bought for years quietly reformulates. That is the job Munchable does in the aisle, in about a second, from the barcode.