Green powders have exploded in popularity over the last few years. Brands like Bloom and Athletic Greens/AG1, among others, promise everything from better gut health to clearer skin, more energy, and improved immunity all in one scoop.
But as RDs, one question comes up all the time:
“Are these greens actually absorbed by the body?”
Let’s break down what these supplements really offer and whether they’re worth the hype.
First: What Are Green Powders, Exactly?
Most green drinks contain a mix of:
- Dried and powdered greens (including, but not limited to: spinach, kale, spirulina, chlorella, wheatgrass)
- Fruit powders or extracts
- Adaptogens (such as ashwagandha, rhodiola)
- Probiotics or digestive enzymes
- Additional vitamins and minerals
- Flavorings and/or sweeteners
Do We Absorb the Nutrients? The Short Answer: It Depends
Absorption from green powders varies widely based on four key factors:
1. Processing & Formulation
Drying, juicing, and heat exposure can degrade certain nutrients, such as vitamin C, B vitamins, polyphenols, and antioxidants. Whole foods offer these nutrients in their original food matrix, supporting better absorption and synergy between compounds.
2. Nutrient Forms Used
Some green powders include nutrients in forms the body absorbs well (e.g., methylated B vitamins). Others use forms that are harder to absorb (like magnesium oxide or pyridoxine. A label doesn’t tell you the difference unless you know what to look for. It can be helpful to talk to your LCWNS RD to know what form of supplemental nutrients to look for.
3. Dose Matters
Many greens powders list ingredients, such as “fruit and vegetable blend,” and provide a total amount with several ingredients below it. It is unclear the exact amounts of each of these ingredients, and thus hard to know if there are in therapeutically beneficial doses.
4. Fiber vs. Extracts
Powders often contain fiber-like extracts, not whole foods. For example, fiber extracts in powders aren’t the same as the naturally occurring fiber in whole foods. Fiber within the full food matrix slows digestion, supports a healthy microbiome, enhances satiety, and works alongside naturally occurring nutrients in ways isolated extracts can’t replicate.
Are Green Powders Safe?
Generally yes, but there are potential considerations, including:
- The dose and amount of nutrients. Products, such as AG1 basically function like multivitamins, so check the dosage and amounts of other supplements you may take to avoid overdoing it on certain vitamins/minerals.
- Contamination with heavy metals (seek out third party lab tested supplements)
- Added adaptogens may interact with medications and is not safe during pregnancy
- Certain digestive enzymes, fiber, and pre/probiotics can trigger GI discomfort in some individuals
- People with allergies (grass, wheat, shellfish-derived enzymes) should be mindful of possible exposure
As with all supplements, always look for NSF, USP, Informed Choice, or other third-party testing. When in doubt, ask your LCWNS RD.
So… Are These Green Drinks Worth It?
If you’re expecting a magic fix or a substitute for a balanced diet, then you’ll likely be disappointed.
I tell clients to think of these powders as potential additions to a solid nutrition foundation, rather than as a replacement for a balanced diet.
Green drinks like Bloom and AG1 can be a helpful supplement, but they’re not a replacement for whole foods—and the amount of nutrition your body actually absorbs may much lower than what the label implies (due to how/when you take it, your metabolism, and the amount of the nutrients your body needs)
They’re best used as a bridge, not a foundation.
If you enjoy them, great!
If you decide to skip them, there are many other ways to get in your necessary nutrients.
Talk with your LCWNS dietitian to explore when/how these supplements may work for you!
