I never really loved kale.
I tried. I genuinely tried. I massaged it, I threw it in smoothies, I made kale chips, I ordered kale salads at restaurants like someone who has their life together.
And every single time, I thought the same thing.
There has to be a better way.
(I know everyone loves kale. I know it's practically a personality type at this point. But raw kale has a bitterness that is hard to get past, and the texture of those thick stems is... not my favourite.)
Here's the thing, though. I wasn't looking to eat worse. I was looking for a leafy green vegetable that gave me the same nutritional punch as kale without making me feel like I was chewing through a houseplant.
What I found was something most people have never heard of.
It's called Wolffia globosa (And it's the reason I started Wolfa).
Note: If you're someone who wants real plant nutrition without the stems, the bitterness, and the Sunday meal prep, then Wolffia might be the green you've actually been looking for. Join the waitlist at mywolfa.com and be first in line when Wolfa launches in the US.
What If the Best Kale Substitute Needed Zero Prep?
This is the part where I tell you about Wolffia.
Wolffia globosa is a real, whole plant. A leafy green, technically, and one of the most nutrient-dense vegetables on the planet. It grows on water rather than soil, it's heat resistant during cultivation, and it doubles in size in as little as one day. At less than 1mm in size, you eat it whole and raw without doing anything to it at all.
No stems to remove. No bitter taste to massage away. No kale chips to bake because raw kale was too tough. Mix it into smoothies, stir it into soups, or just take it straight. It has a mild, neutral taste that blends into whatever you're making without changing the flavor.
I encountered Wolffia at a food expo in Thailand and built Wolfa around it because I'd been looking for exactly this: real plant nutrition that fits into an actual human life.
Why I Use Wolffia Instead
I built Wolfa around one simple idea.
Most of us want to do better. We know these vegetables are good for us. But buying kale at the farmers market, keeping it fresh, prepping the stems, cooking it properly, and making it taste good is a lot to ask when life is busy.
Wolffia lets you skip all of that without skipping the nutrition. It's a whole food, a real plant, grown in water on a single traceable farm in Thailand. Non-GMO. No pesticides. No proprietary blend. No added sugar. Full transparency on what's in it.
It bridges the gap between vegetables, which are nutritious but inconvenient, and supplements, which are convenient but often not real food. Wolffia is both real and easy. That combination almost doesn't exist.
Wolffia globosa packs more complete protein than kale, contains bioavailable B12 that kale doesn't have at all, and requires zero prep.
All of these options are worth knowing. Dark leafy greens like collard greens, mustard greens, and swiss chard are some of the most nutrient-dense vegetables you can put in your body. Lighter options like English spinach, watercress, and arugula bring their own benefits. Cooked, raw, blended into smoothies — it all adds up.
The research on plant-rich eating is consistent: people who get more of these dark greens and vegetables into their regular routine tend to do better across a wide range of health markers. They support inflammation control, digestion, cardiovascular health, and bone density. More variety in your daily greens, consistently, is almost always a good idea. And the best greens are the ones you'll actually use — packed with nutrition, easy to prepare, and genuinely good. That's the whole point.
The problem isn't that people don't know this. The problem is that keeping fresh leafy greens in the fridge, prepping them, and actually cooking them regularly is genuinely hard when life is busy. They wilt. They go bad. They take time. And that friction adds up until people stop and reach for a supplement instead.
That's the gap Wolffia fills. All the flavor and nutrition of real greens and vegetables, with none of the prep.
Wolffia vs. Kale: What the Numbers Actually Say
Let's get into the actual data, because "it's a superfood" doesn't mean anything without specifics.
Protein
Kale is about 4g of protein per 100g raw — respectable for a leafy green, but incomplete. It doesn't contain all the essential amino acids your body needs from food.
Wolffia is 40-50% protein by dry weight and is a complete protein, containing all nine essential amino acids including BCAAs. Its PDCAAS protein quality score is 89%, comparable to animal protein. No other plant on this list comes close.
Vitamin B12
Kale contains no Vitamin B12.
Wolffia is one of the only known plant sources of naturally occurring bioavailable Vitamin B12 — present in the plant itself, absorbed by the body, confirmed in clinical research. For anyone eating plant-based, this is a significant deal.
Other Key Nutrients
Kale is genuinely exceptional here — it provides well above the daily recommended value for this nutrient per 100g raw, and that matters for blood clotting and bone health. One area where kale is hard to beat.
Wolffia also contains meaningful polyphenols, beta carotene, iron, zinc, and calcium — along with vitamin K for blood clotting and bone health. It's a complete nutritional package in a single whole plant, with full transparency on every ingredient. No proprietary blends, no fillers.
Oxalates
Kale is high in oxalic acid, which can interfere with mineral absorption. Cooking reduces oxalate levels — which is part of why cooked kale can be preferable to raw kale nutritionally — but you lose some other nutrients in the process.
Wolffia globosa does not form calcium oxalate crystals. It's essentially oxalate-free, which means the nutrients in it are actually getting absorbed rather than being blocked.
Iron and Calcium
Kale has both, but like most plants, oxalates and phytates can reduce how much you actually absorb from it.
Wolffia provides highly bioavailable iron and calcium. Clinical trials have shown its iron is absorbed efficiently, at levels comparable to red meat — which is significant for anyone on a plant-based diet.
Taste and Texture
Raw kale: slightly bitter, chewy stems, needs prep.
Wolffia: mild, neutral, slightly nutty. No bitter taste. No stems. Mix it into anything and it blends in without changing the flavor of whatever you're making.
Why People Go Looking for a Kale Substitute
Kale is genuinely good for you. It's rich in vitamins A, C, and K, it contains glucosinolates linked to cancer research, and it's been popular in everything from traditional Portuguese soup to Dutch winter comfort food for centuries. The nutritional value is real.
But there are real reasons people want kale substitutes.
Raw kale is tough
The stems especially — you either spend time massaging the kale leaves into submission or you accept a slightly bitter, chewy salad. Curly kale is the worst offender. Dinosaur kale (also called Tuscan kale or cavolo nero) is a bit more tender, and red Russian kale has a milder flavor still, but none of them are what you'd call easy eating.
Kale also has a strong taste
Not everyone's into it. And kale leaves wilt unevenly when cooked — the delicate leaves go soft fast while the stems stay tough, so you often need to cook stems separately from the greens.
All of this makes kale a commitment. And sometimes, you just want something nutritious that doesn't feel like a project.
The Usual Kale Substitutes (Honest Take)
If you've been searching for kale substitutes, you've seen the same list everywhere. Here's my honest take on each one.
Collard Greens
Collard greens are probably the closest match to kale. They're in the same brassica family, they're packed with vitamins A, C, and K, and they handle heat well. Collards are sturdier than kale, which means they work beautifully as a cooked side dish but aren't ideal eaten raw. The stems are thick and need more cooking time than the leaves. The good news is that collards taste great braised low and slow — similar to how you'd treat kale in Southern-style recipes. Solid kale substitutes for hot dishes, soups, and stews. Not as versatile for salads.
Swiss Chard
Swiss chard is a personal favourite. The chard stems come in rainbow chard varieties — red, yellow, orange — and they're genuinely beautiful. Swiss chard offers more calcium and iron per serving than kale, and it's high in vitamins A, C, and K. The stems need to cook separately for about 10 minutes before you add the chard leaves, but once it's going, it's tasty and versatile in soups, stir fry dishes, and as a side dish tossed with a little oil, garlic, lemon juice, salt, and a splash of vinegar. Rainbow chard in particular is one of those vegetables that makes you feel like a real cook.
Mustard Greens
Mustard greens are underrated as kale substitutes. They have a peppery, slightly bitter flavor similar to kale when cooked — so if you actually like kale's edge, mustard greens are a natural swap. Packed with nutrition, generous in calcium and iron, and genuinely tasty when sautéed with garlic, a pinch of salt, a little salt and lemon, and a dash of vinegar. They're also closely related to kale in the brassica family — alongside turnips and cabbage — which is why the flavor profiles overlap so well. Cavolo nero (dinosaur kale) and mustard greens are actually considered cousins in the same plant lineage.
Spinach
Spinach and English spinach are the most common kale alternatives, and for good reason. English spinach is ideal for raw kale recipes — fresh leaves, mild taste, great in salads and smoothies. It wilts down quickly when cooked, which is useful in dishes where you want the greens to almost disappear. The texture is much more delicate than kale, so it's not great in heavy cooked dishes like stews, but for salads and light cooking it's the easiest substitute. (I wrote a whole piece on this: check out my guide to spinach alternatives.
Arugula
Arugula brings a peppery, nutty flavor and is high in nitrates and calcium — a solid source of calcium for dairy-free diets. Arugula is best eaten raw, great in salads with a simple salad dressing, a squeeze of lemon juice, or a drizzle of vinegar. It wilts almost instantly when cooked, so it's less useful as a substitute kale in hot dishes.
Watercress
Watercress is genuinely one of the most nutrient-dense greens available — some studies rank it as the number one superfood by nutrient density. It has a peppery taste, works well in salads and soups, and is a tasty kale substitute when you want something with serious nutritional depth and a milder flavor than raw kale. Watercress also pairs well with spinach in mixed salads if you want to blend mild and peppery greens together.
Broccoli Rabe
Broccoli rabe (also called rapini) is a bitter leafy green that belongs to the same family as turnips and broccoli rather than true kale. It has a stronger bitter taste than kale, so it's not for everyone. Sauté broccoli rabe with garlic, red pepper flakes, and a little olive oil and it transforms into something delicious. A great substitute kale option for cooked Italian-style recipes, and it pairs well alongside chicken dishes too.
Bok Choy
Bok choy is an excellent source of calcium and vitamins A and C, with a mild taste and crisp stems that hold up well in stir fry and soups. The tender leaves wilt like spinach while the stems stay crunchy. Napa cabbage is similar: mild, easy to cook, good in a wide range of recipes.
Romaine Lettuce
Romaine lettuce and iceberg lettuce sit at the mild end of the spectrum. Great for raw salads, gentle taste, easy to eat. Romaine lettuce holds up better with heavier salad dressing. Neither is a direct substitute for kale in cooked recipes, but for raw salad applications they're solid options.
Cabbage
Cabbage more broadly — including green cabbage, red cabbage, and savoy — is sturdy, versatile, and in the same brassica family as kale. Cavolo nero is technically a kale variety, but regular cabbage shares some of the same plant compounds and works well in slaws, soups, and stir fry. Collards and cabbage are both affordable, heat-resistant vegetables that hold up better than delicate greens in long-cooked dishes. Less nutrient-dense than kale but far easier to cook, and much milder in taste.
Cauliflower & Broccooli
Cauliflower and broccoli round out the brassica family options. Broccoli especially has a similar nutritional profile to kale and works well roasted, steamed, or tossed into soups. Not technically greens in the traditional sense, but solid swaps in cooked dishes — and the flavor is familiar to anyone who already eats broccoli regularly.
All of these are real options with genuine health benefits. I'm not dismissing any of them.
But every single one requires something from you. Shopping, washing, prepping, cooking. Even the easiest ones still need to get from the farmers market to your fridge to your plate before they go bad. And in summer, a bag of delicate greens can wilt in days.
We're bringing Wolffia to the US market and you'll be first to know when it's ready.
The Bottom Line
Kale is a genuinely good vegetable. I'm not here to cancel it.
But if you've been looking for an alternative to kale that requires less effort, skips the bitterness, and actually delivers more on protein and B12, Wolffia is worth knowing about.
It's real food. It's a whole plant. And it's about as close to effortless as nutrition gets.
Join the waitlist at mywolfa.com and be first to know when Wolfa launches in the US.
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