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MGB+ vs AG1
Comparison · MGB+ vs AG1
MGB+ vs AG1.
AG1 is a 75-ingredient greens powder built as a daily multivitamin substitute. MGB+ is a three-capsule line built around the gut-brain pattern: bloating, brain fog, fatigue, and the cyclical nausea that ride together. The two products are aimed at different jobs. This page compares them honestly so you can pick the right one.
TL;DR
If you want broad daily nutrition coverage and don't want to think about it, AG1 is a reasonable pick. If you have a specific pattern (IBS, functional dyspepsia, cyclical nausea, central sensitization), MGB+ targets the wiring that drives those symptoms. Most people who feel worse than blood work suggests get more from MGB+. Most people who feel mostly fine and want a single daily insurance scoop get more from AG1.
Side-by-side comparison
| Feature | MGB+ | AG1 |
|---|---|---|
| Form | Three capsule formulas (Clear, Cool, Calm) | Single daily greens powder |
| Primary job | Targeted gut-brain pattern (DGBI) | Broad daily nutrient coverage |
| Ingredients per capsule | 6 to 8 disclosed doses, no blends ✓ | 75 ingredients in proprietary blends |
| Active vitamin B1 (allithiamine) | 75 to 150 mg per dose ✓ | Standard thiamine only |
| Magnesium glycinate | 100 to 400 mg per dose ✓ | No specific magnesium form disclosed |
| Built for symptoms | Yes (IBS, FD, CVS, CHS, central sensitization) ✓ | No (foundational nutrition only) |
| Physician-built | Yes, ER physician founder ✓ | Influencer and athlete partnerships |
| Third-party tested | Yes, every batch | Yes |
| Subscription price | About $50 per month for one formula ✓ | About $79 per month |
| Money-back guarantee | 365-day on 90-day supply ✓ | Standard return policy |
| Sweetener | None, vegetable capsule | Stevia and natural flavors |
How each one works
MGB+ targets a specific wiring problem.
Each MGB+ formula pairs magnesium glycinate with a fat-soluble form of vitamin B1 (allithiamine or benfotiamine) that crosses cell membranes where standard thiamine cannot. The remaining ingredients are chosen for the pattern the formula is built for. Clear is for the central-sensitization cluster (bloating, brain fog, fatigue, migraine). Cool is for the upper-gut and cyclical-nausea patterns. Calm is for the wired-and-tired pattern and morning queasiness. The thesis is targeted intervention, not blanket coverage.
AG1 is built as daily nutrient insurance.
AG1 is a powder that bundles greens, mushrooms, adaptogens, probiotics, prebiotics, and a multivitamin into one daily scoop. The thesis is broad coverage. You drink it and you don't think about whether you got enough zinc or B12 today. Doses for any single ingredient are smaller than a targeted supplement would use. It is not built for a clinical pattern.
When AG1 is the better pick.
- You feel mostly fine and want a single daily multivitamin replacement.
- You eat an inconsistent diet and want broad insurance against deficiencies.
- You prefer drinks to capsules.
- You don't have a specific gut, brain, or sleep pattern you are trying to address.
- You are looking for a single all-in-one product, not a targeted intervention.
When MGB+ is the better pick.
- You have a named pattern (IBS, functional dyspepsia, CVS, CHS) and want a formula built for it.
- Your symptoms travel together (bloating plus brain fog plus migraine plus fatigue) — the central-sensitization cluster.
- You want clinical-trial doses for the active ingredients, not blended placeholders.
- You want a physician-formulated product with disclosed doses for every ingredient.
- You want the active form of vitamin B1 that actually reaches nerve tissue.
Which one for your pattern?
I have IBS with bloating, fatigue, and headaches that travel together
Pick: MGB+
MGB+ Clear is built for exactly this cluster. AG1 will not move it.
I feel mostly fine and want a daily greens habit
Pick: AG1
AG1 wins. MGB+ is targeted, not foundational.
I have post-meal burning, fullness, or reactive gut
Pick: MGB+
MGB+ Cool is built around mastic gum, zinc-carnosine, and motility support for this pattern.
I have wired-and-tired evenings and morning queasiness
Pick: MGB+
MGB+ Calm targets the brain-gut wiring under that pattern.
I eat well and want one product to replace my multivitamin
Pick: AG1
AG1 is closer to a multivitamin replacement than MGB+ is.
I want both — broad nutrition and targeted gut-brain support
Pick: Either
They are not in conflict. Some people stack AG1 in the morning with MGB+ at their pattern's strongest time of day.
Pricing, honestly.
MGB+
MGB+ 30-day supply is $49.99/month on subscription, or $126 for a 90-day supply ($42/month, $1.40/day). Welcome Kit is included with the 90-day order. 365-day money-back guarantee on the 90-day supply.
AG1
AG1 is roughly $79 per month on subscription, or about $99 one-time. Lower per-day price for the volume of ingredients, but no targeted clinical mechanism.
Per-dollar value depends on what you are trying to do. AG1 is cheaper per nutrient. MGB+ is cheaper per clinical mechanism. Different jobs.
Frequently asked
Can I take AG1 and MGB+ at the same time?
Yes. They do not overlap in any meaningful way. Many MGB+ customers also drink AG1 in the morning. Take AG1 in the morning and MGB+ with the meal closest to your pattern's strongest time of day (often dinner for Clear, with meals for Cool, evening for Calm). Loop in the physician managing any prescription medications.
Will switching from AG1 to MGB+ leave nutritional gaps?
Possibly, yes. MGB+ is not a multivitamin. If AG1 was your only daily nutrient source, switching to MGB+ alone may leave coverage gaps for vitamins and minerals you were getting from AG1. Easier path: keep a basic multivitamin (or AG1) if you want broad coverage and add MGB+ for the targeted job.
Does AG1 help with IBS or DGBI?
AG1 is not built for disorders of gut-brain interaction (DGBI). The probiotics and prebiotics in AG1 do not target the central-sensitization wiring or the upper-gut pattern that drive most DGBI symptoms. If your gut symptoms travel with brain fog, migraine, or fatigue, that is the central-sensitization cluster and AG1 is unlikely to move it.
Why does MGB+ use allithiamine instead of standard B1?
Standard vitamin B1 (thiamine HCl) is water-soluble and does not cross efficiently into nerve tissue. Allithiamine is a fat-soluble form first found in garlic. It crosses cell membranes and the blood-brain barrier where standard B1 cannot, and powers the enzymes that produce energy in nerve and gut tissue.
Which one tastes better?
Capsules don't taste like anything. AG1 is a powder with a greens-and-stevia profile. If taste matters, MGB+ wins by default.
Match the job to the product.
AG1 is broad daily nutrient coverage. MGB+ is targeted gut-brain pattern support. If your symptoms have a name and a cluster, take the 60-second quiz and see which MGB+ formula matches your pattern. If you just want a daily greens habit, AG1 is a fine pick.
Find your formula →