What Are Alternative Milks?

Alternative milks are milk and milk products that are made from plants. They are also sometimes called vegan milk, plant-milk or non-dairy milks (or schmilks, if you’re a Science VS fan). The market for alternative milks is growing rapidly around the world. US non-dairy milk sales increased 61% between 2012 and 2017, according to a study by Mintel.

The most popular alternative milks are almond and soy milk (80% of market share in 2018). Soy milk is the traditional non-dairy milk. It was first sold in the US in the 1950s. But there are lots of alternatives (e.g., coconut, pecan, cashew, quinoa, hazelnut, rice, coconut, pea). Non-dairy milk alternatives can be cereal-based, legume-based, vegetable-based, seed-based, or nut-based. Oat milk is a relatively new entrant, but it ascending quickly in the alternative milk market.

Globally, the alternative milk market reached about $18.5 billion USD in 2018. By 2024, it is expected that the global alternative milk market will reach $38 billion USD, according to market research. Although this is a widespread trend, demand is growing the fastest in the Asia-Pacific region

Major alternative milk brands include Silk, Almond Breeze, and Rice Dream. Some newer entrants include Oatly, Califia Farms, New Barn Organics, Ripple Foods, Innocent, Mooala, and Malk.

Which Alternative Milk is Best?

Health

A big portion of the market for non-dairy milk is driven by health concerns. While this is a perfectly good reason to choose one product over another, we didn’t focus on it because it isn’t an ethical consideration. Non-dairy milks are not nutritionally equivalent to cow’s milk (although some vegan milks are fortified with nutrients like calcium, vitamin D, and vitamin B12 to make them more comparable).
Kyla mentioned a couple statistics on global lactose intolerance, including that “65% of the human population has a reduced ability to digest lactose after infancy”. You can read more about that at the US National Library of Medicine website.

Animal Welfare

All of the alternative milks we’re discussing are plant-based, but they may not necessarily be vegan. Many of them are, but some use honey or other animal-based substances in some of their products. Usually the company’s website will tell you whether their products are vegan or not.

Environment

Assessing environmental impact is complicated. No single indicator can give us a holistic impression of what is environmentally best. Some common environmental indicators include land use, water use, emissions, and energy intensity. Generally speaking, dairy milk fares poorly on all of these environmental criteria when compared with alternative milks. But it gets a bit more complicated when it comes to choosing which non-dairy milk is the best.

Land Use: It’s a Matter of L and D

Cultivating a crop takes land, and that means diverting land use from other purposes. Agricultural land use contributes to deforestation and climate change because it requires the conversion of existing ecosystems like wetlands and forests, which are carbon sinks. There can also be social justice issues when agricultural land use pushes people out of their communities. Agricultural land use is a big challenge because of its scale: agriculture covers about 40% of the world’s land area. So, if you are concerned about environmental issues, it’s best to support an alternative milk that requires relatively less land to grow.

On land use, all four of the mainstream non-dairy milks do pretty well. They are all substantially better than their dairy counterparts. And the four main non-dairy milks - rice milk, soy milk, oat milk, and almond milk - all require relatively similar amounts of land to produce. However, oat and soy milk are slightly worse than rice/almond milk.

There have been some recent reports about deforestation and the displacement of indigenous peoples as a result of soy farming. This is absolutely a concern, but keep in mind that 90% of soybean crops go into animal feed. So, most of the land displacement occurring from soy is actually consumed indirectly in the form of chicken, pork, beef, farmed fish, eggs, and dairy.

Land use is also connected to other environmental consequences. Fertilizer run-off can pollute drinking water and accelerate eutrophication.

Oat milk is an interesting alternative from the perspective of soil sustainability. Some experts argue that increasing biodiversity in crop rotations can help farmers to use less pesticides. Since corn and soybeans are the two staple crops in the typical rotation, some experts suggest that adding a third crop (like oats) to the rotation can introduce big improvements for water pollution, soil erosion, and crop yields.

Emissions: Cashews Don’t Fart

Food production is responsible for a quarter of all human-produced greenhouse gas (GHG) emissions. Dairy milk produces more than double the GHG emissions of its non-dairy counterparts, per glass. Amongst the non-dairy alternatives, there are minor differences - with rice milk at the high end and almond milk at the low end - but in general emission rates are similar.

Water Footprint

Water footprints measure the amount of water used to produce each of the goods and services that we use. It’s an important measure to think about, because so much of our water usage comes from indirect sources - from the water that is used to make the things that we buy. And it is especially important when we’re talking about food: about 90% of the water a person consumes comes from the food they eat or the water used to make it. We might drink 3 litres of water each day, but the average water footprint for a Canadian is 6,392 litres per day.

Water footprint is a big differentiator for alternative milks. Although almond and rice milk still have a smaller water footprint than dairy milk, they are much thirstier than soy and oat milk. A single glass of almond milk requires 74 litres of water to produce - more than a typical shower. This is because of the water intensity of the crop itself: almonds require six times more water to grow than oats.

As with most environmental metrics, it matters a lot where a crop is produced. That’s another thing that puts almond milk on the negative side of the ledger: almonds are a water intense crop produced mainly in California, a region which is at high-risk of droughts. And unlike crops that can be left fallow, almond trees require water even in drought years. In contrast, oat production is a lot less geographically concentrated.

Energy Use

We weren’t able to find much about the relative energy intensity of making alternative milks, unfortunately.

Labour and Human Rights

Most of the information out there on non-dairy milk focuses on health and environmental sustainability. It was difficult to find information on labour and human rights, even though we know that agricultural workers can experience some of the most difficult working conditions.

1.3 billion people - approximately one-third of the global workforce are employed as agricultural workers. Agricultural workers are often employed informally, paid poorly, and subject to unsafe workplace practices. They are, somewhat ironically, among the most food-insecure. More than 170,000 agricultural workers are killed doing their jobs every year. And the risk of a fatal accident is twice as high in food production than in any other sector, according to the UN Special Rapporteur on the Right to Food. Although most of the agricultural workforce is employed in developing countries, working conditions are also a concern in wealthy countries, who draw on temporary migrant workers for much of the workforce.

Generally speaking, crops like almonds and oats are less labour-intensive to harvest than fruits like avocados. But there are still significant labour concerns. And this is an area seems to be largely missing from the alternative milk conversation. Having said that, there are a few alternative milk companies out there that have ethical labour policies.

Oatly, a Swedish oat milk producer, sources its organic oats (it also uses conventional oats) from Swedish oat producers that have KRAV-certification. KRAV is a third-party organics standard that meets European Union organics regulations. KRAV also has labour and human rights provisions, including housing conditions for migrant workers.

One newer brand called REBBL, which makes plant-based “elixirs”, claims to ethically source its primary ingredients -- although they don’t use a specific certification scheme.

The Winner: Oat Milk?

Oat milk has become the darling of non-dairy milk advocates. It has three times the protein of almond milk and twice the fibre (according to Mother Jones). It uses less water - and grows in more places.

Is it better to buy or to make your own non-dairy milk? For our money, we would choose to make oat milk. It’s super easy, uses less waste, and you can control what goes into it.