How does Athletic Greens’ AG1 compare to multivitamins and Greens powders? Is AG1 worth it?

Answer:

[UPDATE (5-12-25): Athletic Greens AG1 Reformulated: Athletic Greens recently reformulated AG1, describing the change as an "upgrade" to include more vitamins and minerals, as well as probiotics with digestive and immune health benefits. The new formula is currently sold only through the company's website, and it bears a "Next Gen" sticker. The previous version (as tested in this Review) is still sold through AG1's official Amazon store.

Among the many changes, be aware that the amount of vitamin B-12 was increased to a whopping 400 mcg, up from 22 mcg. Although uncommon, side effects of high-dose B-12, including acne and rosacea, and one study found high-dose B-12 to increase the risk of colorectal cancer in older adults when also given with folate (which is also in the product). On a positive note, green tea extract (which can potentially cause liver toxicity) was removed from the new formula, as was selenomethionine and spinach.

Other changes include adding 10 CFU of probiotics, as well as vitamin K2 (90 mcg), myo-inositol (100 mg), boron (500 mcg), molybdenum (45 mcg), and choline (25 mg). It made small increases in vitamin B6, vitamin C, and magnesium.

The Athletic Greens website claims that the new formula was investigated in four placebo-controlled clinical trials (not yet published) that apparently showed AG1 to increase blood levels of folate and vitamin C, and healthy bacteria in the gut, in healthy adults, but details (including what was used as a placebo and if these increases were statistically significant) are not provided.

The cost of AG1 Next Gen is similar to that of the previous formula, AG1.

AG1

In 2022, ConsumerLab purchased and tested AG1, the popular "greens" powder from Athletic Greens, checking for contamination with lead and other heavy metals, bacteria, and pesticides. Our findings are discussed in our Fruits, Veggies, and Other Greens Supplements Review, and in the Safety section below. [As of May 15, 2025, this version of AG1 is still sold on the company’s Amazon storefront but no longer sold on Athletic Greens’ website.]

Ingredients

The version of AG1 tested by ConsumerLab in 2022 provides 75 vitamins, minerals and nutrients. While some of these will help fill nutrients gaps for certain people, some are provided in excess of Daily Values (i.e., daily requirements) such as vitamin C (at 467% of the DV) and biotin (1,100% of the DV) and may not be needed by most people in the U.S. At the same time, it provides only small amounts (10% of the DV or less) of important macrominerals such as calcium, magnesium, and potassium.

AG1 also includes various proprietary "complexes" with ingredients that have shown health benefits in clinical research, but the complexes themselves do not appear to have been clinically studied (and AG1, itself, does not appear to have been studied). Also, the amounts of the ingredients in the complexes are not disclosed, so it is not possible to know if they are safe or effective amounts.

For example, its "Superfood Complex" (7,388 mg per serving) is touted as "supporting the microbiome and key bodily systems." The complex includes the prebiotic inulin, which may help promote the growth of bacteria in the gut, spirulina and chlorella, which may help lower cholesterol and control blood sugar, cocoa, which may improve blood flow, blood pressure, cholesterol levels, and other health measures, as well as many other ingredients, but it is unclear if the amounts of these ingredients in the complex are likely to be beneficial. In addition, its "Plant Extracts and Antioxidants Complex" (2,732 mg per serving) is touted as being able to "provide you with additional support you won't receive from vitamins" and to "help you adapt to stress." While some of the ingredients in the complex — such as Rhodiola, ashwagandha, eleuthero, and others — are considered to be adaptogens, evidence supporting the use of these ingredients for conditions such as stress or mental fatigue is generally weak. Furthermore, it is again unclear if the complex contains amounts of these ingredients that might have clinical benefit.

Safety

Due to the amount of lead per serving ConsumerLab found in AG1 in 2022, regular use of this product should be avoided by children and women who may be pregnant. See What CL Found section and the Results table in our Fruits, Veggies, and Other Greens Supplements Review to see our complete test results for this product.

The amounts of vitamins and minerals listed in this version of AG1 do not exceed tolerable upper intake levels (despite often being higher than required in some cases). Nevertheless, be aware that high doses of biotin can interfere with laboratory test results, including thyroid tests. In addition, high doses of vitamin C can increase the risk of kidney stones in at-risk individuals. Consequently, it may be wise for men and anyone at risk for or with a history of kidney stone to avoid taking more than 250 mg of vitamin C per day. Also be aware that the ingredients in AG1 such as spirulina can cause allergic reaction in some people. In addition, AG1 has been linked with elevated liver enzymes in anecdotal reports. Although this does not prove cause-and-effect, AG1 does contain certain ingredients, such as green tea extract and ashwagandha, that have been linked with liver toxicity.

Cost

AG1 is expensive relative to other supplements. ConsumerLab has found that you can get a good multivitamin, providing 100% of the Daily Value of most vitamins and minerals for as little as 3 cents per day. AG1 costs approximately $3 per day — or 100 times as much. Even if compared to other "greens" or "whole foods" powders, AG1 costs about 50% to 200% more than products ConsumerLab has tested and given top ratings.

Based on our review of AG1, if you are looking for specific active ingredients in AG1, it may be wiser and less costly to consider getting them from supplements in which the amounts are listed, so that you get exactly what you want and expect.