A greens powder ingredients list can run to forty entries and read like a hedgerow. It is easier to understand than it looks, because those forty ingredients fall into about six families — and each family is in there for a different reason.
1. Grasses
Wheat grass, barley grass, pre-sprouted activated barley
The founding ingredients of the category, and usually the largest by weight. Cereal grasses are harvested young, before the grain forms, which is why they are green rather than starchy.
They are also where the fibre in most greens blends comes from. In ours, barley grain fibre is the ingredient behind an authorised claim: barley grain fibre contributes to an increase in faecal bulk.
Worth knowing: wheat grass and barley grass mean the product contains gluten. Any greens powder containing them is unsuitable for coeliacs, and a good label says so on the front rather than in the small print.
2. Algae
Spirulina, chlorella
Not plants at all — spirulina is a cyanobacterium and chlorella a single-celled green algae, both grown in water rather than soil. They are included for their density: a small weight of either carries a lot of plant material.
Two practical notes. They are the usual source of the naturally occurring sulphites declared on greens powders, which matters if you are sensitive. And they are the ingredients that make the strongest contribution to the taste. We have a fuller guide to algae supplements here.
3. Fruits and berries
Acerola, baobab, acai, bilberry, blueberry, apple, lucuma
These are the ingredients doing the claim-carrying work, and the reason is vitamin C.
Acerola cherry in particular is one of the richest natural sources there is. In a well-made greens powder the vitamin C on the label comes from these fruits rather than from added ascorbic acid — which is what “food-form” means, and which a good label will state outright. Ours does.
That matters commercially as well as nutritionally: vitamin C contributes to the reduction of tiredness and fatigue and to the normal function of the immune system, and without a nutrient present at a meaningful level, a greens powder has no authorised claim available to it at all.
4. Vegetables and leaves
Kale, broccoli, spinach, carrot, beetroot, parsley, nettle, alfalfa, asparagus
The part of the list that looks most like a shopping basket, and the part that most justifies the format. Getting nine different vegetables into a day is hard; getting them into a scoop is not.
None of them carries an authorised health claim in Great Britain, so what a seller may honestly tell you is what is in there and how much. Anyone telling you more than that is going beyond what the rules allow.
5. Mushrooms
Reishi, shiitake, maitake, chaga, cordyceps, lion's mane
The newest addition to the category and the one with the widest quality gap.
The distinction that matters is fruiting body versus mycelium. Fruiting body is the mushroom itself. Mycelium is the root-like network, typically grown on grain and sold with the grain included — so a meaningful proportion of the powder can be substrate.
Ours declares fruiting body against all six. If a label lists mushrooms without specifying, that is the question to ask. There is a full explanation here.
6. Seeds, herbs and spices
Linseed, quinoa, fennel seed, turmeric, black pepper, peppermint, green tea, ginger, cinnamon
The smallest weights on the list. Some are there for the fats and fibre, some for flavour — peppermint and fennel earn their place partly by making the rest more drinkable.
Be realistic about quantities here. At the bottom of a forty-ingredient list, these are present in small amounts. That is not a criticism of the format; it is simply what a blend is.
The two things a label should tell you
Whether it is a proprietary blend. Most forty-ingredient formulas are — ingredients listed in order of weight, individual weights not declared. Ours is, and we say so rather than leaving you to work it out.
What the allergens are. Gluten from the grasses, sulphites from the algae, and whatever the facility handles. These belong on the front of a greens powder, not buried.
Where to go next
If you are choosing between products, our honest buyer's guide sets out the checks that separate them. If the taste is your hesitation, powder or capsules is the more useful question.
Ours is Organic Daily Greens — forty Soil Association certified organic ingredients, six fruiting-body mushrooms, food-form vitamin C, high in fibre. 300g, 20 servings, £24.99.
Contains gluten and naturally occurring sulphites. Always read the label. Food supplements are not a substitute for a varied and balanced diet and a healthy lifestyle.
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