Transfer Factor Max vs AG1
TL;DR
- They're not competitors. AG1 is broad nutritional coverage. Transfer Factor Max is targeted immune support. Different jobs.
- AG1 contains zero transfer factors. No greens powder does. That's the defining difference, not a technicality.
- Overlap is three ingredients: vitamin C, zinc, and mushrooms. Everything else is distinct.
- $79/mo (AG1 subscription) vs $94/mo (Max at MyShop price). Both together: about $173/mo.
- Neither replaces the other. Max isn't a multivitamin. AG1 isn't an immune peptide supplement. Buy for the problem you actually have.*
AG1 (formerly Athletic Greens) is a powdered daily nutrition supplement made by AG1 Holdings, combining vitamins, minerals, whole-food plant powders, probiotics, digestive enzymes, and adaptogens into a single scoop. 4Life Transfer Factor® Max is a capsule-form immune supplement made by 4Life Research USA, LLC of Sandy, Utah, built around 900 mg of transfer factor peptides plus a supporting polysaccharide complex. The two are frequently compared because both are premium daily supplements marketed partly on immune benefits — but they are built on entirely different premises.*
Most comparisons of these two products are written by someone with a commission riding on the answer. We have one too: this site is an Independent 4Life Affiliate storefront, and we earn if you buy Transfer Factor Max. So here's the version we'd want our own family to read first — starting with the part that doesn't help us.
The core difference in one sentence
AG1 supplies nutrients your immune system needs. Transfer Factor Max supplies peptides that 4Life describes as immune information.*
That distinction is the entire article, and it's worth unpacking. Vitamin C, zinc, selenium and vitamin D are substrate — the raw materials immune cells require to function normally. If you're low on them, topping them up helps. If you're already sufficient, adding more generally doesn't do much. That's the model AG1 operates on, and it's a legitimate one: nutrient shortfalls are genuinely common in Western diets.
Transfer factors are a different category. They're small immune-signalling peptides — first described by immunologist H. Sherwood Lawrence in 1949, who showed that immune reactivity could be transferred between people via a low-molecular-weight extract of white blood cells.4 4Life sources them from bovine colostrum, hen egg yolk, and — in Max specifically — Brassica napus seeds. The proposed mechanism isn't nutritional at all. It's educational: helping immune cells recognise, respond, and remember.*
Which means the honest framing isn't "AG1 vs Max." It's closer to "a well-stocked pantry vs a training manual." You can want both. You can also genuinely only need one.
Side by Side · Verified July 2026
| Specification | Transfer Factor Max | AG1 |
|---|---|---|
| Product category | Targeted immune supplement | Daily greens & multivitamin |
| Transfer factor peptides | 900 mg / day | None |
| Broad vitamin & mineral base | No | Yes |
| Probiotics | No | Yes |
| Digestive enzymes | No | Yes |
| Greens / whole-food powders | No | Yes |
| Vitamin C | Yes | Yes |
| Zinc | Yes — 90% DV | Yes |
| Mushroom ingredients | Shiitake, cordyceps, maitake, agaricus | Reishi, shiitake |
| Vitamin D3 | Yes — high potency | Sold separately (D3+K2) |
| IP-6 | Yes — Cordyvant™ complex | No |
| Format | 4 vegetable capsules | 1 scoop powder in water |
| Flavour | None (capsule) | Pineapple & vanilla |
| Vegan | No — colostrum & egg yolk | Yes |
| Supply per unit | 30 days (120 caps) | 30 days (30 servings) |
| Standard price | $111 retail · $94 MyShop | $79/mo subscription |
| One-time price | $94 (MyShop, no subscription needed) | $99 |
| Cost per day | $3.13 (MyShop) | $2.64 (subscription) |
| Money-back guarantee | 30 days | 90 days |
Where they genuinely overlap — and it's smaller than you'd think
Three ingredients appear in both products: vitamin C, zinc, and mushroom extracts. That's it. If you're taking both, those are the only places you're paying twice.
Zinc is the one worth watching. Transfer Factor Max delivers zinc at 90% of the daily value, AG1 contributes more, and zinc has an established tolerable upper intake level. That's not a reason to avoid combining them — it's a reason to know your total across everything you take, including any separate multivitamin. Our FAQ page covers Max's full nutrient panel.
The mushrooms differ by species. AG1's published comparison lists reishi and shiitake. Max's Super-Mushroom Blend is shiitake, cordyceps sinensis, maitake, and agaricus blazei, delivered inside the 843 mg Cordyvant™ Proprietary Polysaccharide Complex alongside IP-6, oats, and baker's yeast. Different blends, different purposes, overlapping only at shiitake.
The vitamin D detail most comparisons miss
Here's a concrete, checkable difference. AG1's core pouch does not include vitamin D. AG1 sells vitamin D3 plus K2 as a separate product, which it bundles free with certain subscription tiers. Transfer Factor Max includes high-potency vitamin D3 (cholecalciferol) in the base formula.
This matters because vitamin D insufficiency is among the most common micronutrient shortfalls in the US, particularly at higher latitudes and in winter. If you assumed "AG1 covers my multivitamin needs," vitamin D is a gap worth checking — either through AG1's add-on, a standalone D3, or a formula that includes it. See our full ingredient breakdown for Max's exact panel.
Evidence: both real, both mostly manufacturer-funded
Cassius, our resident skeptic, insisted this section stay in. Both companies advertise clinical backing, and in both cases the picture is more nuanced than the marketing suggests.
AG1 cites several randomised, placebo-controlled trials — including a triple-blind parallel-design study in 105 healthy adults over 12 weeks examining nutrient biomarkers and microbiome shifts, plus smaller crossover trials in 16 to 24 participants on bioavailability and GI tolerance. These are real trials with real methodology. They're also company-sponsored, short, and focused on biomarkers rather than long-term health outcomes.
4Life cites Yu et al. 2024 in Current Issues in Molecular Biology — a genuinely peer-reviewed, independently published paper reporting immune cell activation within two hours of ingestion.1 That's the strongest single citation on either side of this comparison. But Max's more distinctive claims — stem cell mobilisation, neutrophil activation — rest on 4Life technical reports (Gardner 2026, Jensen 2026) that are company-affiliated and partly preclinical.2,3 Anyone describing those as "clinically proven" in the same sense as Yu 2024 is overstating the record, and we won't.*
The honest summary: neither product has independent long-term outcome data. AG1 has more trials; 4Life has one stronger independent publication. Both are ahead of the vast majority of supplements sold, which have neither.
Who should buy AG1 instead of Transfer Factor Max
We'd rather you buy the right thing than buy from us. AG1 is the better purchase if:
- Your diet is genuinely thin on produce. If vegetables are rare in your week, broad micronutrient coverage will do more for you than a targeted immune peptide.
- You want one product to replace several. AG1 is designed to consolidate a multivitamin, greens powder, and probiotic. Max is not designed to replace any of those.
- You're vegan. Max is not vegan — two-thirds of its transfer factor content is bovine colostrum and hen egg yolk. This is disqualifying, not a preference.
- You won't swallow four capsules a day. Adherence beats formulation. A powder you actually drink outperforms capsules that sit in a cupboard.
- You want a longer trial window. AG1's 90-day guarantee is three times Max's 30 days. That's a real advantage and we won't pretend otherwise.
- You're pregnant or breastfeeding. Neither product is formulated for those stages — AG1 states this explicitly. Talk to your provider rather than choosing between them.
Who should buy Transfer Factor Max instead of AG1
- You already eat well and take a multivitamin. Adding AG1 on top duplicates what you have. Adding transfer factors adds a category you don't.
- Immune support is your specific goal. No amount of greens powder delivers transfer factor peptides, because greens don't contain them.*
- You want the mechanism, not the nutrients. If the recognise–respond–remember model is what interests you, AG1 doesn't address it at any price.
- You prefer capsules and travel often. No shaker, no scoop, no water source required.
Can you take both?
Yes, and plenty of people do — the formulas mostly don't collide. The two practical considerations are cost and zinc.
On cost: AG1 at $79 plus Max at $94 is roughly $173 per month, or about $2,076 a year. That's a real number and worth saying out loud before anyone drifts into it one purchase at a time. On zinc: check your combined intake against the upper limit, especially if a separate multivitamin is also in the rotation.
If budget forces a choice and you're genuinely torn, the tiebreaker we'd suggest is honest self-assessment of your diet. Poor diet, broad gaps, AG1. Decent diet, specific immune interest, Max. Trying to solve a broad problem with a narrow product — or the reverse — is the most common way people waste money on supplements.
Frequently asked questions
References
- Yu, L., Iloba, I., Cruickshank, D., & Jensen, G.S. (2024). Current Issues in Molecular Biology, 46, 6710–6724. Peer-reviewed; reports immune cell activation within two hours.
- Gardner, D. et al. (2026). 4Life Technical White Paper on Stem Cell Mobilization. Company-affiliated; partly preclinical.
- Jensen, G. et al. (2026). Clinical Report 058-010 on Neutrophil Activation. Company-affiliated.
- Lawrence, H.S. (1949). Proceedings of the Society for Experimental Biology and Medicine, 71, 516–522. Original description of transfer factor.
- AG1 product, pricing, and research-footnote disclosures, drinkag1.com, retrieved 21 July 2026.
*These statements have not been evaluated by the Food and Drug Administration. Transfer Factor Max is a dietary supplement and is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary. AG1® is a trademark of its respective owner; this site is not affiliated with, endorsed by, or sponsored by AG1. Prices and specifications are current as of July 2026 and subject to change; each manufacturer's storefront is authoritative. Consult your healthcare provider before beginning any new supplement program, particularly if pregnant, nursing, or taking medication.