Good Day Vitamin vs AG1: Which Greens Powder Is Actually Better?
If you've been researching greens powders, you've probably encountered both Good Day Vitamin and AG1. Both are heavily marketed, both have strong customer followings, and both promise to transform your health with a single daily scoop or sachet.
The question is simple: which one is actually worth your money?
The honest answer depends on what you're optimizing for. But if you're looking at this from a pure value and effectiveness perspective, the differences are significant.
Quick Comparison Table
| Factor | Good Day Vitamin | AG1 |
|---|---|---|
| Price per serving | $1.66 AUD | $3.30 AUD |
| Monthly cost | $49.95 AUD | $99 AUD |
| Format | Single-serve sachets | Powder scoop |
| Ingredients | 10 key nutrients | 75+ ingredients |
| Philosophy | Targeted essentials | Comprehensive coverage |
| Taste | Passionfruit flavour | Earthy/grassy |
| Australian made | Yes | No |
| Customer rating | 4.9/5 (1,601 reviews) | 4.5/5 (varies) |
The Price Difference Is Massive
This is the first thing that jumps out: Good Day Vitamin costs $49.95 AUD for 30 sachets, which works out to approximately $1.66 per serving. AG1 costs around $99 AUD per month, or roughly $3.30 per serving.
That's a 100% price difference for essentially the same category of product: a daily nutritional supplement.
Over a year, choosing Good Day Vitamin instead of AG1 would save you approximately $600 AUD. That's not a trivial amount.
The question is whether AG1 delivers twice the value. Let's examine that.
The Ingredient Philosophy: Targeted vs Comprehensive
Good Day Vitamin takes a targeted approach. It includes 10 key nutrients that research shows most people are deficient in or that support specific health outcomes: Turmeric extract (200mg) for inflammation and joint support, Rhodiola Rosea (120mg) for stress and mental clarity, full B vitamin complex for energy and nervous system support, magnesium (420mg) for muscle function and sleep, zinc (14mg) for immune function, vitamin C (100mg) for antioxidant support, and folate and B12 in bioavailable forms.
The formula is straightforward. You know exactly what you're getting and why.
AG1 takes a comprehensive approach. It contains 75+ ingredients across multiple categories: vitamins, minerals, probiotics, adaptogens, superfoods, digestive enzymes, and phytonutrients. The idea is to create a nutritional insurance policy that covers as many bases as possible.
The problem with the comprehensive approach is that many of those 75 ingredients are present in amounts too small to have meaningful effects. Additionally, AG1 contains very high doses of some nutrients. For example, it delivers 467% of the daily recommended value of vitamin C and 1,100% of vitamin B7. For water-soluble vitamins, excess amounts are simply excreted, so you're essentially paying for expensive urine.
Winner for value: Good Day Vitamin. You're paying for ingredients in meaningful doses, not a long list of marketing ingredients.
Convenience and Taste
Good Day Vitamin comes in single-serve sachets. You tear open a sachet, pour it into a glass of water, and mix. It has a passionfruit flavour, which most reviewers describe as pleasant and easy to drink. The format is genuinely convenient for travel or busy mornings.
The downside is that sachets generate more packaging waste than a powder tub, and you can't adjust the serving size or flavour intensity.
AG1 comes as a powder that you scoop into water. The taste is described as earthy and grassy, which some people enjoy and others find unpalatable. The advantage is that you can adjust the water ratio to suit your taste preference, and the packaging is more environmentally friendly.
Winner: Tie, depending on preference. If taste and convenience matter to you, Good Day Vitamin has the edge. If you prefer flexibility and less packaging waste, AG1 wins.
The Science: Do They Actually Work?
This is where both products face the same fundamental problem: greens powders are not a substitute for eating actual vegetables.
Good Day Vitamin is more honest about this. It's positioned as a multivitamin supplement, not as a replacement for a healthy diet. The ingredients are present in reasonable doses, and the formula is relatively transparent.
AG1 is marketed more aggressively as a complete nutritional solution. The reality is that no single powder can replace the fibre, phytonutrients, and whole-food benefits of eating actual vegetables. The high doses of some vitamins and the inclusion of probiotics and digestive enzymes are marketing features, not medical necessities for most people.
That said, both products will deliver their stated nutrients. If you're deficient in B vitamins, magnesium, or zinc, both will help. The question is whether you need all 75 ingredients in AG1 to achieve that benefit.
Winner: Good Day Vitamin. It delivers the nutrients you actually need without the marketing hype.
Who Should Choose Each Product
Choose Good Day Vitamin if: You're budget-conscious and want to save $600 per year. You prefer a simple, transparent formula with targeted nutrients. You want something convenient to mix and actually enjoy drinking. You're looking for energy, stress relief, and immune support. You prefer Australian-made products. You want a multivitamin, not a greens powder replacement.
Choose AG1 if: You want the psychological benefit of a "complete" nutritional insurance policy. You're willing to pay premium prices for brand reputation and influencer endorsements. You prefer a powder format over sachets. You want the comprehensive ingredient list, even if many ingredients are present in sub-therapeutic doses. You're not price-sensitive.
The Honest Verdict
Good Day Vitamin is the better value. At half the price with a more transparent formula and better taste, it delivers what it promises without the marketing hype. If you're looking for a daily multivitamin to fill nutritional gaps, it's the smarter choice.
AG1 is not a bad product. It works, and if you have the budget and prefer the brand, there's nothing wrong with taking it. But you're paying a significant premium for ingredients that may not meaningfully improve your health beyond what Good Day Vitamin provides.
The best greens powder is the one you'll actually take consistently. If AG1's brand reputation and marketing make you more likely to take it daily, then the premium might be worth it to you. But if you're purely optimizing for health and value, Good Day Vitamin is the clear winner.
The Bottom Line
Good Day Vitamin costs half as much as AG1, tastes better, and delivers a more transparent formula with nutrients in meaningful doses. Unless you specifically need the comprehensive ingredient list of AG1 for psychological reasons, Good Day Vitamin is the better choice for most people.
Your money is better spent on actual vegetables, consistent training, and adequate sleep than on premium greens powders. But if you're going to buy one, make it Good Day Vitamin.
This article is based on ingredient analysis, pricing information current as of April 2026, and customer reviews from verified purchasers. Product formulations and pricing may change over time.