  Dependencies in the global food production network can lead to shortages in
numerous regions, as demonstrated by the impacts of the Russia-Ukraine conflict
on global food supplies. Here, we reveal the losses of $125$ food products
after a localized shock to agricultural production in $192$ countries and
territories using a multilayer network model of trade (direct) and conversion
of food products (indirect), thereby quantifying $10^8$ shock transmissions. We
find that a complete agricultural production loss in Ukraine has heterogeneous
impacts on other countries, causing relative losses of up to $89\%$ in
sunflower oil and $85\%$ in maize via direct effects, and up to $25\%$ in
poultry meat via indirect impacts. Whilst previous studies often treated
products in isolation and did not account for product conversion during
production, our model studies the global propagation of local supply shocks
along both production and trade relations, allowing comparison of different
response strategies.
