5 Things Most Rwandans Don’t Know About Mushrooms — And Why They Matter

Fact 1: Mushrooms are more closely related to humans than to plants

This is the one that stops people mid-conversation. Genetically, fungi share more DNA with the animal kingdom — including humans — than with the plant kingdom. Both fungi and animals are heterotrophs (we consume organic matter rather than produce it via photosynthesis) and both have cell membranes containing ergosterol, a compound plants entirely lack.

The evolutionary split between fungi and animals happened roughly 1.5 billion years ago. The split between fungi and plants was even earlier. We are, in a meaningful biological sense, more closely related to a mushroom than a mushroom is to a tomato.

Fact 2: The part you eat is just the fruit — the real organism is invisible

The mushroom cap and stem that you cook are the fruiting bodies — the reproductive structure of the fungus. The actual organism is the mycelium: a network of microscopic threads that can extend through meters of substrate or soil, processing nutrients and sending them back to the fruiting body.

In the wild, mycelium networks can connect multiple trees in a forest, transferring nutrients between plants. Scientists call these networks the “wood wide web.” What you purchase at 3,000 RWF per kilogram from Miru Mushrooms is the equivalent of picking fruit from this enormous, mostly invisible organism.

Fact 3: Mushrooms can produce vitamin D just like human skin

Place oyster mushrooms gill-side up in direct sunlight for 15–30 minutes before cooking. The ergosterol in their cells converts to vitamin D2 through the same ultraviolet radiation process that creates vitamin D in human skin.

This is the only plant-adjacent food that can produce vitamin D in meaningful quantities. For Rwandan families eating limited animal products — the primary dietary source of vitamin D — sun-exposed mushrooms can meaningfully improve weekly vitamin D intake. The conversion is real and measurable: studies show UV-exposed mushrooms can contain 400 IU of vitamin D per 100g serving.

Fact 4: Mushrooms are already fighting Rwanda’s malnutrition

Nutrition programs in Rwanda and across sub-Saharan Africa have incorporated mushrooms into school feeding programs specifically because they address protein and micronutrient gaps that other affordable foods cannot. The complete amino acid profile — all eight essential amino acids present — is what distinguishes mushroom protein from most plant proteins.

Lentils and beans provide protein, but not all essential amino acids in optimal ratios. Oyster mushrooms do. At 3,000 RWF per kilogram, this is the most cost-effective complete protein source available in Kigali.

Fact 5: Rwanda’s geography is close to perfect for mushroom farming

The highland climate that makes Rwanda one of Africa’s most agriculturally productive countries also makes it exceptional for mushroom cultivation. Cool nights slow contamination. Moderate year-round humidity means less artificial humidity control is needed. The altitude provides natural temperature ranges that oyster mushrooms prefer.

This is why mushroom farming has expanded rapidly among smallholder farmers in Rwanda’s districts. The climate cooperates in ways it doesn’t in many other African countries.