The global and regional costs of healthy and sustainable dietary patterns: a modelling study
By Marco Springmann, PhD; Michael A Clark, PhD; Prof Mike Rayner, PhD; Peter Scarborough, PhD; Prof Patrick Webb, PhD
November 24, 2021
…
Findings
Compared with the cost of current diets, the healthy and sustainable dietary patterns were, depending on the pattern, up to 22–34% lower in cost in upper-middle-income to high-income countries on average (when considering statistical means), but at least 18–29% more expensive in lower-middle-income to low-income countries. Reductions in food waste, a favourable socioeconomic development scenario, and a fuller cost accounting that included the diet-related costs of climate change and health care in the cost of diets increased the affordability of the dietary patterns in our future projections. When these measures were combined, the healthy and sustainable dietary patterns were up to 25–29% lower in cost in low-income to lower-middle-income countries, and up to 37% lower in cost on average, for the year 2050. Variants of vegetarian and vegan dietary patterns were generally most affordable, and pescatarian diets were least affordable.
…
In high-income and upper-middle-income countries, all dietary patterns, except for the high-veg pescatarian diets, were less expensive, with greatest cost reductions for the high-grain vegetarian and vegan diets (cost reductions of 22–34% across the two regions), followed by the high-veg vegetarian and vegan diets (17–27%), the flexitarian diets (12–14%), and the high-grain pescatarian diets (1–3% in each region). In
The global and regional costs of healthy and sustainable dietary patterns: a modelling study
By Marco Springmann, PhD; Michael A Clark, PhD; Prof Mike Rayner, PhD; Peter Scarborough, PhD; Prof Patrick Webb, PhD
November 24, 2021
…
Findings
Compared with the cost of current diets, the healthy and sustainable dietary patterns were, depending on the pattern, up to 22–34% lower in cost in upper-middle-income to high-income countries on average (when considering statistical means), but at least 18–29% more expensive in lower-middle-income to low-income countries. Reductions in food waste, a favourable socioeconomic development scenario, and a fuller cost accounting that included the diet-related costs of climate change and health care in the cost of diets increased the affordability of the dietary patterns in our future projections. When these measures were combined, the healthy and sustainable dietary patterns were up to 25–29% lower in cost in low-income to lower-middle-income countries, and up to 37% lower in cost on average, for the year 2050. Variants of vegetarian and vegan dietary patterns were generally most affordable, and pescatarian diets were least affordable.
…
In high-income and upper-middle-income countries, all dietary patterns, except for the high-veg pescatarian diets, were less expensive, with greatest cost reductions for the high-grain vegetarian and vegan diets (cost reductions of 22–34% across the two regions), followed by the high-veg vegetarian and vegan diets (17–27%), the flexitarian diets (12–14%), and the high-grain pescatarian diets (1–3% in each region). In
Source: https://www.thelancet.com/journals/lanplh/article/PIIS2542-5196(21)00251-5/fulltext
they do not explicitly include food from home production or differentiate subgroups within a population.
this also seriously considered poore-nemecek 2018 as a source uncritically.
and they assume everyone is paying full retail price for food, where most poor people actually receive some kind of subsidized or free food.
the model diet they used is not vegan, but flexitarian.
this is not very good evidence you’ve presented, so I still doubt the claim is true