Mycoprotein is one fungus, grown and dried. Sold as Quorn since 1985, it's the body of Fusarium venenatum, grown in a tank, heat-treated, and bound into mince, pieces, sausages, and nuggets. Its cell wall carries a fungal fibre, beta-glucan, that meat and ordinary plant proteins don't. It drags bile acids out in the stool; the liver rebuilds bile from cholesterol, so LDL drops. The same fibre flattens blood-sugar and insulin curves after eating, and taking meat off the plate cuts saturated fat at the same time.

The protein is complete, and the cholesterol drop is the most replicated finding in the meat-swap literature. All nine essential amino acids, absorbed about as well as milk; on the standard quality scores it sits next to milk and egg, ahead of beef, chicken, soy, and pea. LDL fell 10% over four weeks in overweight adults swapping at home ¹, 12% in men trading 240 g/day of red meat for it ², and 13% in the original 1992 trial ³. A meal built on it stimulates muscle growth better than milk protein gram for gram ⁴. And insulin runs lower after a mycoprotein lunch, with people eating about 10% less at the next meal without being told to ⁵.

Map the swap onto a meal you already cook.

Different effects on different clocks. The afternoon after a mycoprotein lunch runs flatter, with less of a 3pm slump, from the first meal, though you only notice if you're watching ⁵. LDL moves over two to four weeks, around 10%, larger if your starting number is higher ¹. Over years, three swaps a week sit upstream of the cardiovascular curve the same way a statin's LDL drop does: weaker per point, but free and compounding, and it never went on a chart or needed a follow-up appointment.