Disclosure up front: I’m an affiliate for Momentum, one of the two products in this comparison. If you buy through a link here, I earn a commission. I’m telling you now, not in the footnotes, because a comparison written by someone with a stake is only useful if you know about the stake. So I’m going to be hard on Momentum where it deserves it and fair to IM8 where it earns it — that’s the only version of this worth reading.
Here’s the bottom line, since you’re comparing and you want the verdict:
Both are good all-in-one shakes. IM8 is the broader, pricier, celebrity-backed one — about $183 a month for the full Beckham Stack. Momentum covers the same core ground — protein, collagen, NAD+ — for about $150 a month, and lets you trial a single bag first. Choose IM8 if you want the widest ingredient list and NSF Certified for Sport. Choose Momentum if you want most of the same job without paying for a David Beckham co-founder. The honest gap between them is smaller than the price difference makes it sound — and that’s the whole story.
Let me show my work.
What you’re actually paying for with IM8
IM8 is David Beckham’s shake. That’s not a knock — it’s the product’s headline, and it’s central to understanding the price.
The pitch is strong: “One sachet. 90 ingredients. Everything your body actually needs.” Co-founded by Beckham, endorsed by Giannis Antetokounmpo and Aryna Sabalenka, with Jay Shetty in the mix. It’s NSF Certified for Sport, which is a real, meaningful certification if you’re a competitive or drug-tested athlete. The review base is enormous — north of 16,000 — and the self-reported outcome stats are loud (around 95% felt more energy, 80% reported better sleep).
The cost takes a little unpacking, because IM8 sells a few tiers:
- Daily Ultimate Essentials (the single all-in-one drink) is marketed at roughly $6 a day — about $180 a month — and pitched as replacing “$4,000+/year in supplements.”
- The full Beckham Stack (Essentials Pro + Longevity) bills around $548 every 12 weeks, which works out to about $183 a month.
So when I say “$183,” I mean IM8’s full flagship stack — the apples-to-apples all-in-one comparison. Their cheapest single product is less, but it’s also doing less.
Here’s what I’ll give them without hesitation: ~90 ingredients is genuine breadth. If your goal is the single widest net, IM8 casts it wide. And the NSF for Sport cert is not nothing — for a tested athlete, that alone can be the deciding factor.
What you’re also paying for is a marketing machine. A global icon co-founder. Three more famous faces. That budget comes from somewhere, and it comes from the price.
What Momentum gives you for less
Momentum doesn’t have a Beckham. It has, in order of what actually matters:
- Grass-fed whey isolate — about 30g of protein. Real protein, not a token gram.
- Grass-fed collagen — joints, skin, connective tissue; the stuff you make less of past 35.
- An NAD+ precursor — the actual longevity ingredient. NAD+ is what your cells use for energy and repair, and it declines with age.
- Hyaluronic acid, digestive enzymes, a probiotic co-culture, electrolytes, and vitamins D and K2 — the supporting cast.
It’s third-party tested and HSA/FSA eligible. The pitch — “two scoops replace 20+ separate supplements” — is the same stack-replacement promise IM8 makes, just without the 90-ingredient arms race. Momentum doesn’t try to win on ingredient count. It leads with named longevity actives, dosed where you can see them.
I’ve taken it daily for four months. If you want the unabridged version — taste, what I noticed week by week, what I’m taking on faith — that’s in my full Momentum longevity shake review. For this page, the relevant point is: it does the core job IM8 does.
Head-to-head
| IM8 (Beckham Stack) | Momentum | |
|---|---|---|
| Type | All-in-one shake | All-in-one shake |
| Ingredient count | ~90 | Fewer, led by named actives |
| Protein | ✓ | ✓ ~30g grass-fed whey |
| Collagen | ✓ | ✓ grass-fed |
| NAD+ precursor | ✓ | ✓ |
| Certification | NSF Certified for Sport | Third-party tested · HSA/FSA eligible |
| Real monthly cost | ~$183/mo (~$6/day) | ~$150/mo for 2 bags (~$5/day) |
| Try a single unit first? | Steeper upfront (full stack) | ✓ one bag, $75 sub / $80 one-time |
| The hook | ~90 ingredients + Beckham | Named longevity actives, no celebrity markup |
The price reality (let me be straight about the numbers)
This is where most comparisons get lazy or sneaky, so I want to be precise.
You’ll see $75–80 on the Momentum site and might think that’s the monthly price. It isn’t. That’s the price of one bag ($80 one-time, $75 on subscription), and a bag is two scoops a day for about two weeks. A full month is two bags — about $150 on subscription. I’d rather tell you that plainly than let you anchor on $80 and feel misled at reorder. (If you want to never get that wrong, I made a 90-second first-order cheat sheet that covers it.)
So the real, honest comparison is $150 a month vs. $183 a month. Not “half price” — anyone telling you that is fudging the per-bag number. It’s about $33 a month less, or roughly a dollar a day.
Is a dollar a day a big deal on its own? No. What makes it matter is what the extra dollar buys. When I look hard at IM8 versus Momentum, the core ingredients you’d actually feel — protein, collagen, NAD+ support — are present in both. The extra $33 a month is buying you ingredient breadth (the back half of those ~90 ingredients, many at modest doses) and a marketing budget with a footballer on it. If breadth and the brand matter to you, that’s a fair trade. If they don’t, you’re paying about $400 a year for a name.
There’s also the trial math. With Momentum you can buy a single $75–80 bag, run it for two weeks, and bail if you hate it. IM8’s full stack is a heavier upfront commitment for the same “let me see if I like this” question. For a skeptical buyer, that lower bar to entry is worth something.
The celebrity-markup question
Let me ask the question the SERP is full of — “why is IM8 so expensive?” — and answer it fairly.
It’s not only the celebrity. Around 90 ingredients and NSF for Sport certification genuinely cost more to formulate and verify than a leaner formula. Some of the premium is real.
But not all of it. When a competitor makes the same all-in-one promise — protein, collagen, NAD+, the works — for $33 a month less and without a global icon attached, the most reasonable read is that a meaningful slice of IM8’s price is the marketing, not the powder. That’s not a scandal. That’s how celebrity brands work. You’re allowed to decide the name is worth it. I’m just not going to pretend the name is free.
Where IM8 genuinely wins
A comparison that only trashes the other product is a sales pitch in disguise, and you’d be right not to trust it. So here’s where IM8 is the better pick, no spin:
- You’re a tested athlete. NSF Certified for Sport is the cleaner credential here. If your federation cares, this can be the whole decision.
- You want maximum breadth. If your instinct is “give me everything,” ~90 ingredients is a wider net than Momentum throws, full stop.
- You trust scale. 16,000+ reviews and big self-reported outcome numbers are a real signal of a lot of satisfied users. Some people, reasonably, want the crowd behind their purchase.
- The price genuinely doesn’t move you. If $183 vs $150 is noise in your budget, buy the one with the formulation philosophy you like best — and IM8’s is legitimate.
I mean all of that. IM8 is not a bad product. It’s a good product with a premium attached, and for some people the premium is justified.
The trust question (this is the real fork)
Here’s the part I think actually decides it for the kind of person who reads a 3,000-word comparison before buying a shake.
IM8 leans on aggregate trust signals: celebrity co-founders, thousands of reviews, and — cleverly — “284 clinicians share IM8 without compensation.” That last one is a genuinely good move. But notice what it is: a brand telling you that third parties vouch for it.
What I’m offering is different in kind, not degree. I’m one named person who paid for these products, took them, and is staking my own reputation on the recommendation — including telling you, repeatedly, exactly when to buy IM8 or AG1 instead. If Momentum stopped working for me, I’d stop recommending it and lose the commission. That’s the trade I’ve made, and it’s the only trust signal I think is worth much: skin in the game, in public, with a name on it.
You don’t have to take my word over Beckham’s. But you should know the difference between the two kinds of “trust me.”
My verdict
For a research-literate buyer who hates paying for marketing: Momentum. It does the core job IM8 does — protein, collagen, NAD+, the stack-replacement promise — for about $33 a month less, lets you trial a single bag, and doesn’t ask you to fund a celebrity’s involvement. It’s the one I’ve personally kept in rotation, which is the most honest endorsement I’ve got.
For a tested athlete, a breadth-maximalist, or someone who simply isn’t price-sensitive and likes IM8’s formulation: IM8 is a legitimate choice and I won’t talk you out of it.
If Momentum is your pick, you can check current pricing and flavors here. Order the full one-month supply — that’s two bags, since one bag is only two weeks — use code livebetter at checkout for a discount, and you’ll get free samples of every flavor with your first order. Start with chocolate or berry.
Still deciding? My four-months-in Momentum review and my honest AG1 alternative breakdown cover the rest. No countdown timers — the links will be here when you’re ready.
Frequently Asked Questions
Is IM8 worth it?
IM8 is a genuinely well-formulated all-in-one — around 90 ingredients, NSF Certified for Sport, a large base of positive reviews. Whether it’s worth $183/month for the full Beckham Stack depends on how much you value breadth and the brand. If you want the widest ingredient list or certification for competitive sport, it’s defensible. If you mainly want the core actives — protein, collagen, NAD+ — without paying for a celebrity co-founder, Momentum delivers most of the same job for about $33/month less.
Is David Beckham’s IM8 actually good?
Yes — it’s a real, thoughtfully formulated product, not a vanity label. The ingredient breadth is high and it’s third-party certified. The fair criticism isn’t quality, it’s price: at $183/month for the full stack you’re partly paying for the marketing and the Beckham name. The product is good; the question is whether it’s $33-a-month-better than a cheaper all-in-one that covers the same core ingredients.
What’s the difference between IM8 and AG1?
AG1 (~$99/month) is primarily a greens powder — no meaningful protein, no collagen, no NAD+ precursor. IM8 (up to ~$183/month for the Beckham Stack) is a true all-in-one with ~90 ingredients including protein and longevity actives. They’re different categories. If you’re comparing IM8 to AG1, you’re really asking “greens vs. an all-in-one” — compare IM8 to other all-in-one shakes like Momentum instead. (More in my AG1 alternative breakdown.)
Why is IM8 so expensive?
The full Beckham Stack runs ~$183/month (billed roughly $548 every 12 weeks), and the single Daily Ultimate Essentials drink is ~$6/day. Part is genuine — ~90 ingredients and NSF Certified for Sport cost money to formulate and test. Part is the brand: a Beckham co-founder, Giannis and Sabalenka endorsements, and heavy marketing get funded somewhere. A comparable all-in-one like Momentum makes most of the same claims at ~$150/month, which suggests a meaningful chunk of IM8’s premium is the name, not the powder.
Is there a cheaper alternative to IM8?
Yes — Momentum covers the same core ground (grass-fed whey, collagen, an NAD+ precursor, probiotics, electrolytes) at about $150/month for the two-bag monthly supply versus IM8’s $183 Beckham Stack. You can also trial a single bag ($75 subscription / $80 one-time) before committing, where IM8’s full stack is a steeper upfront commitment. It’s third-party tested and HSA/FSA eligible.