IM8 vs AG1 (2026): An Honest, Science-Based Comparison

AG1 by Athletic Greens has been the default answer to "what greens powder should I take?" for nearly a decade. It's trusted, well-marketed, and genuinely popular. Lewis Hamilton takes it, Andrew Huberman talks about it, and millions of people drink it every morning.

Then IM8 arrived. Backed by David Beckham, co-developed with scientists from Mayo Clinic, Yale, Cedars-Sinai, and a former NASA Chief Scientist, and positioned not as a greens powder but as a longevity and performance supplement. The claims are bolder, the ingredient list is longer, and the price is comparable.

So which one is actually worth your money in 2026?

This comparison cuts through the marketing on both sides. We look at what's in each formula, how the dosing philosophy differs, what the quality certifications actually mean, and who each product is genuinely best suited for.

These two products are often compared as if they're the same thing. They are in the same aisle, but they are not the same kind of product. IM8 leans "all in one plus extras," covering hydration, joint support, and heart support. AG1 leans "daily foundation," combining vitamins, minerals, superfoods, adaptogens, and gut support.

If AG1 is about nutritional coverage, IM8 is about nutritional efficiency. AG1 is built for wide coverage, combining vitamins, minerals, greens, probiotics, enzymes, and plant extracts into one daily scoop. IM8 is built for focus — the formula includes fewer ingredients, but each one has a clear role tied to energy, recovery, and performance.

Understanding that distinction is the key to deciding which one belongs in your stack.

Both products clear the most important quality bar: both IM8 and AG1 hold NSF Certified for Sport status — the gold standard for supplement testing, verifying that what's on the label is in the product and that no banned substances are present. This matters enormously, and the fact that both brands hold this certification puts them ahead of the vast majority of greens powders on the market.

IM8 is independently third-party tested for purity, potency, and banned substances. AG1 states it is manufactured in a TGA-registered facility in New Zealand with full batch manufacturing records and traceability.

The differentiation at the ingredient level is bioavailability. IM8 utilizes Quatrefolic, a highly bioavailable form of folate that bypasses the common MTHFR gene mutation issues that affect a significant portion of the population. The IM8 vs AG1 debate often comes down to who is using the most modern, bio-active forms of each nutrient to ensure the highest absorption rates.

Both IM8 and AG1 use bioactive forms like methylcobalamin for B12 and 5-MTHF for folate, the versions your body actually recognizes and uses. That's table stakes in 2026. Where IM8 goes further is in extending that bioavailability-first philosophy across more of its nutrient profile.

One of IM8's most credible differentiators is who built it. IM8 was developed in collaboration with a world-renowned Scientific Advisory team from Mayo Clinic, Yale, Cedars-Sinai, and the former NASA Chief Scientist, backed by rigorous science and testing.

The breadth and caliber of scientific oversight behind IM8's formulation is genuinely unusual for the supplements industry, where most products are built by marketing teams with a contract manufacturer.

This matters more than most people admit. A supplement you can't stand taking consistently is a supplement that doesn't work.

IM8 uses a single acai and mixed-berry profile with hints of cocoa, light, smooth, and easy to mix, helped by a stevia-free sweetener system using Reb M from fermented sugarcane that avoids the common bitter finish of many greens powders.

AG1 started with its familiar sweet pineapple-vanilla base and as of mid-2025 offers Tropical, Citrus, and Berry variants. Unfiltered reviews on Reddit and consumer forums include "strong stevia aftertaste," "medicinal," and "bitter" more often than not, particularly with the new Next Gen formula.

If you value broader flavor choice, AG1 has the edge. If you prefer stevia-free sweetness, IM8 is the cleaner fit.

AG1 commonly lists at $79 for a subscription pouch of 30 servings. IM8 Daily Ultimate Essentials commonly lists from $89 on subscription pricing.

The $10 monthly difference is almost irrelevant when you factor in what each replaces. IM8's inclusion of CoQ10, MSM, electrolytes, and full-spectrum gut support means most users can eliminate several standalone supplements from their stack, a net saving that more than covers the price premium. AG1 is a strong nutritional foundation but you'll likely need to add more on top to match IM8's coverage.

This deserves its own section because it's a legitimate concern for daily users. Independent testing by ConsumerLab in 2025 flagged AG1 for heavy metal content, including lead, arsenic, and cadmium, at levels some experts say should be avoided for daily consumption.

Greens powders concentrate plant material, and with it, whatever was in the soil those plants grew in. This is why contaminant testing matters as much as ingredient quality. Both brands hold NSF certification, but the ConsumerLab findings on AG1 are worth factoring into your decision, especially for long-term daily use.

AG1 built the all-in-one greens powder category and deserves its reputation as a credible daily foundation. For the average person looking for broad nutritional insurance, it does the job well.

But in 2026, the bar has moved. Foundational wellness was the goal of the last decade. 2026 is the year of cellular longevity. Switching from a basic greens powder to a comprehensive longevity stack means moving beyond just filling nutrient gaps to actively targeting the biological markers of aging.

IM8 works best if your priority is energy, recovery, and performance optimization. For biohackers, optimizers, and anyone serious about long-term health rather than just nutritional coverage, IM8 is the more complete, more transparent, and more forward-thinking product.

At ThriveTools, we feature IM8 as our recommended all-in-one foundation for exactly that reason. Explore our full biohacking supplement guide to see how it fits into a complete performance stack, or visit our Personalized Guidance page if you want a protocol built specifically around your biology and goals.