People search for AG1 and Huel in the same session and assume they are alternatives. They are not. One is a multivitamin you take alongside food and the other is designed to be the food. Getting this wrong costs money and, if you skip meals for a 50-calorie scoop, more than money. Here is the distinction, and where each product actually fits.
The Difference in One Table
| Metric | Greens and daily nutrition | Meal replacements |
|---|---|---|
| Purpose | Fill micronutrient gaps in a diet you already eat | Replace the calories and macros of a meal |
| Calories | 20 to 50 | 110 to 400 |
| Protein | 0g to 2g | 15g to 40g |
| Taken | Alongside meals | Instead of a meal |
| Scored on this site | No | Yes, on our 10-point framework |
| Examples | AG1, IM8, Grüns | Huel, Ka'Chava, Orgain, Garden of Life |
Why We Do Not Score Greens Powders
Our 10-point framework weights nutrition profile, protein quality and value heavily, because it exists to answer one question: if this replaces a meal, is that a good meal?
Run AG1 through it and you get a low number driven almost entirely by having 2g of protein and 50 calories. That number would look like a verdict on the product and it would be meaningless, because AG1 is not trying to replace a meal and never claimed to.
So we review these products separately and judge them on what they claim: the quality of the vitamin forms, whether the doses are disclosed and meaningful, the evidence behind them, and the price. No overall score.
The reverse also applies. Scoring Huel on vitamin content alone would ignore that it is 400 calories of actual food, which is most of the reason to buy it.
What Greens Powders Are Good At
Micronutrient insurance in good forms. The better ones use methylated folate, methylcobalamin B12, P5P and well-absorbed magnesium instead of the folic acid, cyanocobalamin and magnesium oxide that fill the cheap end of the category. That is worth something, particularly for the roughly 40% of people carrying an MTHFR variant that impairs folic acid conversion.
Compliance. Underrated. A supplement you take daily beats a better one in a cupboard.
What They Are Not Good At
Replacing vegetables. The whole-food produce content in these products sits inside single large proprietary blends spread across dozens of ingredients. AG1's superfood complex is 7,388mg total. Grüns' Core Nutrients Blend is 8,670mg. Divided across 30-plus powders, that is a small amount of each. It is a garnish on a vitamin panel, not a serving of greens.
Replacing a meal. At 20 to 50 calories, obviously. The risk is real though: people substitute a scoop for breakfast and end up under-eating protein badly.
Letting you verify what you paid for. Proprietary blends are a marketing asset precisely because they cannot be checked. A blend could be overwhelmingly its cheapest component and the label would look the same.
Our Reviews
AG1
Genuinely good vitamin forms and the only serious published research program in the category. No Vitamin D at all, about 75 ingredients you cannot dose-check, and K2 at roughly a sixth of the studied level. $2.63 per serving on subscription.
IM8
The best vitamin panel we have audited. Quatrefolic folate, riboflavin-5-phosphate, magnesium bisglycinate, vegan D3 and K2 MK-7. Held back by large opaque blends across 90-plus ingredients, credential-adjacent marketing, and no published trials on the finished product. $2.61 quarterly.
Grüns
Methylated folate, real D3 at 800 IU, K2 MK-7 at 120mcg, 6g of fiber, individually disclosed vitamin amounts, and about a third of AG1's price. The cost is 8g of added sugar per daily serving and zero protein. A sugar-free variant exists.
Head to head
AG1 vs IM8 is the better formula against the better evidence. AG1 vs Grüns is a third of the price against 8g of sugar. AG1 vs Huel is the supplement-versus-meal question directly.
Do You Need Both?
Usually not, and the honest answer is that a well-chosen meal replacement often covers the same ground.
Huel at $2.12 per serving delivers 400 calories, 40g of protein, 7g of fiber, L-Methylfolate, K2 MK-7 and Vitamin D at full daily value, with every amount disclosed. That is a better vitamin panel than several greens powders, plus an actual meal, for less money.
If you are already using a well-formulated meal replacement daily, stacking a greens powder on top mostly buys redundancy, and because the greens powders hide their doses you cannot easily check whether you are pushing fat-soluble vitamins higher than intended. Worth raising with your doctor before doubling up.
Where both make sense: you use a meal replacement occasionally rather than daily, and want consistent micronutrient coverage on the days you do not.
The Cheaper Path
Worth saying plainly. A well-formulated multivitamin with methylated B vitamins, a separate D3 and K2, and eating more vegetables covers most of what a $79-a-month greens powder does for a fraction of the cost. What you lose is convenience, the probiotic and adaptogen content, and in AG1's case a research program.
That is a real trade and convenience genuinely matters for adherence. But nobody selling these products will tell you the alternative exists, so we will.
Frequently Asked Questions
Can I use a greens powder to replace breakfast?
No. At 20 to 50 calories and almost no protein, that is skipping breakfast with extra steps. If you want a fast breakfast, use an actual meal replacement.
Which greens powder has the best vitamins?
IM8, on the forms used and on including vegan D3 alongside K2. Grüns is close and discloses more, at a third of the price, with 8g of added sugar attached.
Do greens powders count toward my vegetable intake?
Not meaningfully. Eat vegetables.
Why does this site cover them at all if they are not meal replacements?
Because people cross-shop them with meal replacements constantly, and the marketing encourages the confusion. Explaining the difference is more useful than pretending the products do not exist.
Bottom Line
Greens powders are multivitamins with a produce garnish. Meal replacements are food. Both can be worth buying and they solve different problems.
Buy a greens powder for micronutrient insurance in good forms, on top of meals you are still eating. Buy a meal replacement when you need to eat and do not have time to cook. Do not let a 50-calorie scoop stand in for either a meal or a vegetable, and check whether the meal replacement you already use makes the greens powder redundant before you pay for both.
This page is for general information and is not medical advice. Talk to your doctor or a registered dietitian before starting a supplement, particularly if you are pregnant, nursing, managing a health condition or taking medication.
