Greens First Review (2025): Does This “Alkalizing” Powder Live Up To Its Claims?

Greens powders can be a convenient way to include more micronutrients, including vitamins, minerals, phytonutrients, prebiotics, and probiotics, in your daily diet. In our Greens First Review, we’ll look at this popular wellness supplement that you can get on Amazon and break down the nutrition facts label.

Before diving in, I want to point out that this product makes some health claims that are quite tough to back up, particularly that it’s an “alkalizing” supplement and can change the pH of your blood, leading to health benefits. 

This immediately makes me raise an eyebrow because research¹ shows that human blood is always in an alkaline state with a pH of 7.36 to 7.44. Only certain disease states can cause blood pH to change, and on top of that, there’s no scientific consensus that nutrition habits can change blood pH. 

All that said, we’ll look at Greens First through our critical lens to tease out the potential benefits and drawbacks.

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Medical disclaimer: This article is intended for educational and informational purposes only. It is not intended as a substitute for medical advice. For health advice, contact a licensed healthcare provider. GGR also recommends choosing a product that has been third-party tested for quality.

Tasting the Bad Ones So You Can Buy the Good Ones

Greens powders are not known for being the most delicious dietary supplements. For every scoop of choke-worthy greens blends we’ve tried, we hope to have saved you the same misery. But more importantly, we aim to use our expertise in nutrition, supplements, and fitness to guide you to the best greens supplement for your needs.

Greens First Greens Powder

Greens First Original Greens

GGR Score: 2.8

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Product Highlights

• Powdered greens supplement 
• 70 ingredients with 49 different superfoods 
• Claimed to promote easy digestion and help maintain optimal health and well-being 

Pros & Cons

Pros

• 1 scoop contains 15 servings of fruits and vegetables
• No artificial ingredients, sweeteners, or preservatives
• Subscribe and save 10%

Cons

• Very mixed reviews of taste for all 3 flavors: “overly sweet/stevia tasting”
• No unflavored option

Bottom Line

Greens First Original Greens is a supplement that provides 15 servings of fruits and vegetables per serving. According to Greens First, there are over 70 ingredients including 49 superfoods. Original Greens share that their product can help contribute to optimal health and ease digestion. However, there are extremely mixed reviews on taste for this product. Some customers enjoyed the taste and others disliked the taste so much that they did not finish the product they purchased.

A Quick Look at Greens First Greens Powder

Greens First claims to be a green superfood powder composed of whole-food fruit and veggies that creates a cocktail of health benefits—as does every other green juice powder, which is why we’re so passionate about taking a closer look at every supplement we review. 

This green drink in particular contains 49 different superfoods, according to the product description, and supposedly provides more than 15 servings of fruits and vegetables per scoop. It’s free from artificial sweeteners, flavors, and preservatives; it’s also lactose-free, non-GMO, and vegan.

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Before You Buy

• There is no indication that this product is gluten-free; it contains barley grass powder, oat powder, and rice bran powder, so check with your doctor before consuming this product if you have a gluten allergy or sensitivity. 
• Greens First is sweetened with stevia; FYI for anyone who tends to have side effects to stevia. 
• This product contains soy lecithin; those with soy allergies should avoid it.

Is Greens First Worth It?

Greens First is a pretty basic greens powder that can help fill nutritional gaps in your diet. It’s mostly organic, which was a bonus to our product tester, and the ingredients list boasts tons of nutrient-rich fruit and veggie powders. If you are looking for a powder that can supplement the nutrients you might miss in your diet on a daily basis, Greens First is worth a look.

RELATED: Best Organic Protein Powder 

Greens First Specs

Experience Using Greens First

Frieda Johnson, GGR fitness editor and product tester, tried Greens First in the Original Mint Flavor. Frieda has tried several different greens supplements for our nutrition guides and reviews, and is very familiar with plant-based supplements from years of following a vegan diet. To try Greens First, she mixed the powder with cold water as directed, and simply shook it up in a Blender Bottle or stirred it with a spoon to test mixability both ways.

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Price Per Serving

Greens First costs $1.41 to $1.80 per serving when you buy from Amazon, depending on the size you choose. The more servings in the container, the cheaper the cost per serving, which is generally the case with dietary supplements. This price range is in line with what we expect from high-quality greens powders. 

Formulation

The ingredients list is quite comprehensive, and it’s separated into several distinct categories. 

• The organic greens blend contains barley, chlorella, and spirulina.
• The fiber blend contains fiber from oats, apples, and brown rice.
• The vegetable blend includes juice powder from carrots, cauliflower, broccoli, spinach, parsley, and kale.
• The “OxiSure” fruit and vegetable blend is the antioxidant blend and it contains various juice powders and extracts, including from carrot, green tea, blueberry, plum, grape, cranberry, raspberry, tart cherry, pine bark, tomato, spinach, kale, and brussels sprouts.
• The enzyme blend contains various digestive enzymes, including bromelain, papain, protease, amylase, lipase, cellulase, lactase.
• The probiotic blend contains four different probiotics, Lactobacillus acidophilus, Bifidobacterium longum, Lactobacillus casei, and Lactobacillus rhamnosus, but the total number of CFUs is not listed.

Other ingredients not included in the above proprietary blends include: 

• Japanese knotweed root extract
• Decaffeinated green tea extract
• Sprouted barley
• Organic barley seed powder
• Quercetin 
• Milk thistle seed extract
• Red beet root powder
• Cinnamon powder
• Aloe Leaf powder
• Turmeric rhizome extract
• Atlantic kelp powder
• Licorice root extract

Total, there are nearly 50 plant compounds in Greens First. One serving contains 40 calories, 6 grams of carbohydrates, 1 gram of sugar, 1 gram of fiber, 1 gram of fat, and 1 gram of protein. 

Weirdly, other than cholesterol, sodium, potassium, and the aforementioned nutrients, the label doesn’t reveal anything about the contents of micronutrients like vitamin C, vitamin A, or vitamins B, D, E, or K. It also has no mention of mineral content aside from sodium and potassium. 

The label also does not reveal the total number of CFUs of probiotics in the blend.

This could be problematic because if you are taking other vitamins and supplements, including a multivitamin, individual vitamin or mineral supplements, or a probiotic, because it could set you up for potential toxicities (yes, it’s possible to consume too much of a given micronutrient).

On the flip side, it could mean that this powder is providing no nutrients at all—we really could never know without lab testing. That combined with the eyebrow-raising marketing claims makes me second-guess this product. 

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Taste and Solubility

Frieda tried the Original Mint flavor and unfortunately wasn’t impressed. “The original mint tastes VERY strongly of spearmint, which would be fine except it tastes artificial and cloying to me,” she says. 

However, she also notes, “I think it might be due to the stevia, which I am sensitive to, so other people might enjoy it more. While I generally like mint-flavored things, I am not a fan of this one.”

The solubility, on the other hand, is phenomenal. Frieda gave Greens First 5 out of 5 stars in this category, saying it blends very well and that she didn’t notice any settling or graininess at all.

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Side Effects

Because of the taste, Frieda was hardly able to get down a full serving. “This is so strongly flavored that it made me feel sick to my stomach when I tried to drink a full serving,” she says. 

Obviously, taste is subjective, and if you enjoy a strong mint flavor, you likely won’t experience the same effects. That said, we wanted to point it out. 

Other side effects may include bloating or other gastrointestinal discomfort and symptoms, since this product includes proprietary blends of both fiber and probiotics. Introducing these ingredients to your diet suddenly can affect your digestion, but effects should be temporary. You can try starting with half of a scoop if you’re new to fiber or probiotic supplements.

Third-Party Testing 

It does not appear that Greens First is third-party tested; I couldn’t find any indication of the product being independently tested on Amazon or on the company website. This doesn’t automatically indicate mislabeling or any other misconduct on the part of the brand, but it is something to be aware of, particularly for athletes who are subject to drug testing.

Greens First vs Nested Super Greens vs Amazing Grass

Nested Super Greens

Nested Naturals Super Greens Original

GGR Score: 4.1

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Product Highlights

• Contains over 20 whole foods, probiotics, fiber, and enzymes
• 100% organic, non-GMO, and vegan
• One scoop contains 667 milligrams of spirulina, 400 milligrams of chlorella, and 1.67 billion CFU of probiotics
• Third party-tested and approved
• Lifetime money-back guarantee

Pros & Cons

Pros

• Non-GMO, Vegan, 100% organic
• Available in chocolate flavor
• Contains prebiotic inulin to help feed healthy bacteria in the gut
• Over 20 whole foods included
• Many reviews report noticeable differences in energy, mood, and digestion

Cons

• May be too strong for some and irritate the stomach
• Taste is not great but, as a powder made primarily with vegetables, that is not surprising

Bottom Line

While the taste may not suit everyone, Super Greens effectively provides users with a potent dosage of phytonutrients, micronutrients, probiotics, fiber, and enzymes.

Amazing Grass

Amazing Grass Greens Blend

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Product Highlights

• Greens Blend combines greens, fruits, and vegetables
• Non-GMO, gluten-free, no sugar added 
• Formerly called Green Superfood 
• Available in 3 flavors

Pros & Cons

Pros

• Subscribe and save 20%
• Also available as a capsule
• No sugar added
• 7 greens + 1 serving of fruit and veggies

Cons

• Some users disliked the taste
• Mixed reviews on how blendable the powder is
• Less vitamins and minerals than competitors

Bottom Line

If you can handle the negatively reviewed taste of the Greens Blend, you may benefit from improved energy and digestion according to customer reviews.

Two other popular greens powders are Amazing Grass and Nested Naturals. We’ve tested both, and overall, they’re quite similar to Greens First—the more you research greens powders, the more you’ll notice that many of them contain very similar proprietary blends and ingredients. 

This chart summarizes the differences between these three greens supplements, but you can read our full Amazing Grass Green Superfood review and our Nested Super Greens review for more information on both of these supplements.

Customer Experience 

The customer experience on Amazon is the same as you’d expect for any other Amazon purchase: You’re subject to the retailer’s policies, which in this case include free overnight delivery with Prime and a subscribe-and-save option that will save you up to 10% on each order. The product is not returnable, but you may request a refund if it arrives damaged or open. 

If you buy directly from Greens First, your purchase is protected by a 60-day satisfaction guarantee, which is better than the standard 30 days. Shipping will take longer if you order from the manufacturer site. 

Ordering Greens First

This product seems to be available primarily through Amazon, but you can get it on the Greens First website as well. It’s also a wholesale item sold through healthcare professionals. 

Customer Reviews

Customer reviews are largely positive, and the item has an average rating of 4.6 out of 5 stars on Amazon at the time of writing. Reviews mention that the solubility is great, and most customers like the taste or are at least okay with it. 

Some customers have been using Greens First for several years, with one reviewer writing that this has been his go-to greens powder for 20 years. Now that’s impressive! 

One reviewer claims that the powder has helped their immune health: “I used to get sick two to five times a year. After using Greens First once a day for about two years, I hardly get sick anymore,” the buyer wrote. “I have more natural energy and was able to cut back drastically on my caffeine intake as well. I highly recommend this product to anyone interested in supporting their immune system and living a healthier lifestyle.”

Negative reviews complain of the taste being too sweet or too minty, indicating that other buyers felt the same as Frieda in that regard. A couple of reviews say that the overly sweet and strong minty taste also made them feel nauseated. 

Still, by and large, the reviews are positive. 

Final Verdict of Our Greens First Review

Greens First is a greens powder supplement with nearly 50 different ingredients that are derivatives of whole plant foods. It contains various fibers, digestive enzymes, and probiotics in addition to fruit and vegetable powders and extracts. 

It’s not the best-tasting greens powder our product testers have tried, but most customer reviews rate the taste positively. 

One callout is that the supplements facts label does not specify what percentage of the daily value of vitamins and minerals is fulfilled by this product, except for sodium and potassium.

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Greens First Full Rating

Greens First

Our Greens First review looks at the nutritional profile of this greens powder to determine if it’s worth buying.

Product Currency: USD

Product Price: 27

Product In-Stock: InStock

Editor's Rating:
2.8

Greens First FAQs

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any diseases.