Complement Review: Are These Optimal Health Products For a Plant-Based Diet?

Complement is a brand of health supplements, testing kits, and an accompanying cell phone app for those who follow a plant-based diet and want personalized nutrition.

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In This Review

What is Complement?

Complement offers personalized nutritional products for those who follow a plant-based diet and want to resolve any deficiencies to boost overall health. They offer supplements, personal nutritional testing kits, a book about plant-based nutrition, and an easy-to use app.

Open the official website and do the assessment quiz, and they will give you a nutrient blueprint, gut health blueprint, and other personalized information to help you meet your daily nutritional needs.

The supplements offer benefits like added energy, weight loss, improved immune system, heart, and brain health, enhanced digestion, and more. Complement products are ideal for vegan diets and free of chemical or artificial additives.

In this review, we’ll go over all of the details of this optimal program for plant-based dieters and answer all of your most important questions. Then we’ll give you our honest opinion and ratings. Read on!

How Does It Rate?

Overall Rating: 4.8


Value for Cost

4.5/5Value for Cost



Brand Highlights

  • Outlier Health, Inc., a wellness firm with headquarters in Edwards, Colorado, is the maker of the Complement brand.
  • Complement products include 100% organic ingredients.
  • These supplements are suitable for vegetarian and vegan diets.
  • They manufacture Complement in the USA and do careful third-party testing.
  • The company uses sustainable packaging.

Key Ingredients

  • Zinc
  • Magnesium
  • Selenium
  • Vitamins B2, D3, and K2
  • Iodine
  • Barley Grass
  • Omega 3 Fatty Acids
  • Spinach
  • Moringa
  • Chlorella
  • Chia Seed
  • Pumpkin Seed
  • Almond
  • Yellow Pea
  • Sunflower Seed
  • Alpha Linoleic Acid
  • Gamma Linoleic Acid
  • Stearidonic Acid
  • Ginger Root
  • Prebiotics and Postbiotics


  • Complement products can increase energy levels.
  • This brand can improve digestive health.
  • Complement can strengthen the immune system.
  • These products can support heart health.
  • Complement can suppress hunger and promote weight loss.


  • The results may vary for different customers.
  • High demand could lead to low stock sometimes.

You can BUY it directly from the Official Website

Highlighted Products

Complement Gut Nurture

Price: $58

Complement Gut Nurture

A Gut Full of Goodness

Packed with healthy prebiotics and postbiotics, Gut Nurture is a powder supplement that balances the microbiome, improves digestion, promotes more regular bowel movements, boosts nutrient absorption, and relieves unpleasant gut issues like gas, bloating, diarrhea, and constipation.

Key Ingredients: Ginger Extract, Licorice Root Extract, SunFiber, Horse Chestnut, Molybdenum, Pre-fermented Vitamins B1, B5, and B6

Best For: Optimizing digestive health

What It Does: Balances the microbiome, promotes regularity, eases symptoms like bloating and diarrhea, optimizes digestion, strengthens immunity

Complement Essential Multivitamin

Price: $89

Complement Essential Multivitamin

The Ultimate Nutrition Lift

For plant-based eaters, this multivitamin provides all of the nutrition you require to ensure optimal health and wellbeing. It fills any deficiencies in your diet, supports a strong heart, bones, and immune system, and ensures optimal nutritional balance.

Key Ingredients: Zinc, Selenium, Vitamins B12 and D3, Magnesium, Iodine, DHA/EPA Omega 3s

Best For: Providing optimal nutrition and resolving deficiencies

What It Does: Supports, heart, bone, and immune system health, provides needed nutrients

Complement Triple B12

Price: $23

Complement Triple B12

Powerful Nutrient Booster

This powerful liquid supplement optimizes levels of Vitamin B12 to resolve any potential deficiencies in those who follow a plant-based diet. It also supports brain and nervous system health, enhances mood, and provides you with added energy.

Key Ingredients: Vitamin B12

Best For: Providing nutrients, boosting energy, improving mood, supporting the nervous system, optimizing cognitive function

What It Does: Optimizes health and nutrient absorption

You can BUY it directly from the Official Website

About the Brand

The Complement brand manufacturer is Outlier Health, Inc., which is a wellness company that has their headquarters in Edwards, Colorado. Founded by Matt Tullman and author Matt Frazier in 2017, they offer a line of supplements, health testing kits, and other products to support health and wellbeing in people who follow a plant-based diet.

How Does It Work?

The Complement formulas are full of nutrients that fill nutritional deficiencies in people following a plant-based diet for optimized health. They are high in antioxidants which lower oxidative stress to kill free radicals.

As we explained in our review of Natural Stacks, this supports the immune system and promotes general body repair and healing.

A systematic review published in Nutrients by Nicole Neufingerl and Ans Eilander compared nutrient status in meat eaters and those following a plant-based diet and found inadequacies in all dietary patterns [1].

Some products are high in prebiotics and postbiotics which support healthy digestion. They feed the healthy probiotic bacteria in the gut so it proliferates, killing bad bacteria and promoting a balanced microbiome.

Some products are high in prebiotics and postbiotics which support healthy digestion. They feed the healthy probiotic bacteria in the gut so it proliferates, killing bad bacteria and promoting a balanced microbiome.

This can lead to bowel movement regularity and relieve symptoms like gas and constipation. In addition, it may offer weight loss benfits.

A review published in the Journal of Functional Foods by Shumin Wang, et al discussed the use of prebiotics to alter the gut microbiota [2].

A review by Steven R. Hertzler, et al published in Nutrients examined the nutritional effects and quality of plant proteins and their effect on health and physical function [3].

Complement formulas are high in anti-inflammatory agents which decrease swelling in the body for the support of various organs and systems like the heart, brain, and digestive tract.

Complement Ingredients – Are They Safe & Effective?

complement essential multivitamin - supplement facts

Complement Essential Multivitamin – Supplement Facts

These are some of the primary active ingredients in Complement products:

Vitamin B12 –

Sometimes deficient in people on a plant-based diet, B12 is key in the formation of red blood cells, supporting the nervous and circulatory system, and making DNA. Foods high in this vitamin are usually meat and fish based, but you can also get it from fortified cereal.

A research review published in Critical Reviews in Clinical Laboratory Sciences by Agata Sobczy?ska-Malefora, et al examined B12 status and its impact in health and disease [4].

Omega 3 Fatty Acids –

These are polyunsaturated acids often found in fish, as we explained in our review of Triple Strength Omega 3 Fish Oil. They are healthy fats packed with powerful anti-inflammatory agents, and can lessen joint pain and discomfort, boost heart and brain health, and strengthen the immune system.

Omega 3s may also lower triglyceride levels. A research article and review published in Integrative Medicine by Jeffrey S. Bland, PhD, FACN, FACB examined the therapeutic use of omega 3s in treating immune conditions [5].

Ginger Root –

This root is high in antioxidants and anti-inflammatory agents which support health and immune system functioning and decrease swelling the body. It also increases levels of brain neurotransmitters like serotonin and dopamine which boost mood and cognitive function.

A comprehensive systematic review published in Nutrients by Nguyen Hoang Anh, et al explored the impact of ginger on human health [6].

How Does It Rate?

Feature Rating
Complement Unflavored Organic Protein 4/6
Complement Daily Greens 4/7
Complement Triple B12 4/5
Complement Gut Nurture 4.8/5
You can BUY it directly from the Official Website

Frequently Asked Questions (FAQs)

Q: Who Should Buy Complement?

A: The Complement line of products are for people who follow a plant based diet and want to fill in any existing gaps in their nutrition and boost their overall health and immune functioning. They offer personalized nutrition based on a quiz assessment of the user.

Q: What is the Return Policy?

A: The manufacturer has a 100 day risk-free money back guarantee on their product line. If you’re not happy with your order for any reason, contact customer service to begin the return process and send the items back within 100 days of receiving them. You’ll get a full refund of the purchase price, no questions asked.

Q: Is It Worth It?

A: In our opinion, yes, Complement is the ultimate brand for those who follow a plant-based diet and want high quality natural products to support their nutritional needs, personalized. According to the wealth of positive reviews, most users agree with our assessment.

Q: Where to Buy It?

A: While some of the products are for sale individually on Amazon, in our recommendation you should definitely purchase from the official site. That way you get your personal assessment and recommendations based on your needs.

In addition, they offer free shipping for US orders over $95, and discounts on bulk purchases and subscriptions. These are the prices of some of the top products:

  • Essential Capsules – $75.65 (2 months)
  • Gut Nurture – $49.30
  • Daily Greens – $41.65
  • Triple B12 – $19.55
  • Omega Complex – $58.65
  • Chocolate Protein – $50.15
  • Unflavored Organic Protein – $50.15

Q: What Makes This Brand Unique?

A: This brand supports those who follow a plant-based diet all over the world with a personalized assessment and recommendations, healthy supplements, a helpful accompanying app, and a community of support.

What Do the Reviews Say?

In our opinion, Complement is the ideal nutritional system to support the health and wellbeing of people who follow a plant-based diet. We love the pure organic formulas and the fact that each users gets a personalized assessment and recommendations.

Reading through the customer reviews, we see that the vast majority of users agree with us. Of the more than 2688 real reviews on the official site, users give this brand a total score of 4.86 out of 5 stars.

The 209 reviews for Complement Essential Multivitamin on Amazon give the product a rating of 4.4 out of 5 stars.

One of the top 5 star reviews on Amazon is from Debbie Faust, who says the vitamin boosts her energy and overall health:

“This product came highly recommended by some people I follow on YouTube. I’ve been taking it for about 45 days and have noticed that I have quite a bit more energy and I feel it helps fill in any gaps I may have with my mostly plant-based diet.”

One of the most critical Amazon one-star reviews is from KAH, who has difficulty taking the vitamins:

“I realize these are meant to be swallowed whole, but I can’t swallow pills. You can bite these, but the taste is beyond awful.”

We have come across a YouTuber whose channel is named Okraw and has 161K subscribers. He shared his unsponsored opinion and experience as a Raw Vegan in his video, which has gained 3.4K views on YouTube. He explained the Complement Essential Multivitamin product with all the metrics.  

Complement Essential Multivitamin Reviews (Video Credit: YouTube)

Complement Reviews – Conclusion

In conclusion, our comments about Complement are mostly very enthusiastic, and we give the brand a total rating of 4.5 stars. We love the concept of a company which supports plant-based eating with personalized recommendations, and app, and even a community of support.

The user reviews for Complement both on the official site and on Amazon are very positive, with glowing comments from plant-based eaters about how the program has boosted their overall health and wellbeing. Customers mention improvements in energy, digestion, and general health, and many say the brand is more than worth it.

Complement supplements include 100% natural, safe, vegan-friendly ingredients and are free of chemical or artificial additives and preservatives. They are safely manufactured, and there have been no reported side effects from users. For the ultimate ‘Complement’ to your plant-based diet, we highly recommend this brand.

Where To Find It?

You can BUY it directly from the Official Website

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Consumer Health Digest. We do not verify or endorse any claims made in these reviews. Please read the full product reviews disclaimer. *All individuals are unique. Your results can and will vary.

Customer Reviews for Complement Gut Nurture

Complement Review: Are These Optimal Health Products For a Plant-Based Diet?

Customer Reviews & Ratings

5.0 out of 5

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  1. Matthew L.

    Complement is Highly recommended!
    Some YouTube users I follow greatly suggested Complement products. I’ve been taking it for approximately 45 days, and during that time I’ve experienced a noticeable increase in energy. I also believe it fills in any nutritional gaps left by my primarily plant-based diet.

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Complement Gut Nurture
Capsules, Powder & Spray.
180 Softgels
Zinc, Magnesium, Selenium, Vitamins B2, D3, and K2, Iodine, Barley Grass, Omega 3 Fatty Acids, Spinach, Moringa, Chlorella, Chia Seed, Pumpkin Seed, Almond, Yellow Pea, Sunflower Seed, Alpha Linoleic Acid, Gamma Linoleic Acid, Stearidonic Acid, Ginger Root,Prebiotics and Postbiotics.

11 Sources

We review published medical research in respected scientific journals to arrive at our conclusions about a product or health topic. This ensures the highest standard of scientific accuracy.

[1] Nutrient Intake and Status in Adults Consuming Plant-Based Diets Compared to Meat-Eaters: A Systematic Review:
[2] Rational Use Of Prebiotics For Gut Microbiota Alterations: Specific Bacterial Phylotypes And Related Mechanisms:
[3] Plant Proteins: Assessing Their Nutritional Quality and Effects on Health and Physical Function:
[4] Vitamin B12 Status In Health And Disease: A Critical Review. Diagnosis Of Deficiency And Insufficiency – Clinical And Laboratory Pitfalls:
[5] Therapeutic Use of Omega-3 Fatty Acids for Immune Disorders In Search of the Ideal Omega-3 Supplement:
[6] Ginger on Human Health: A Comprehensive Systematic Review of 109 Randomized Controlled Trials:
[7] Omega-3 Polyunsaturated Fatty Acids: Benefits and Endpoints in Sport:
[8] Bioactive Components in Moringa Oleifera Leaves Protect against Chronic Disease:
[9] Spinach And Its Health Benefits: A Review:
[10] Yellow Pea Flour And Protein Isolate As Sources Of Antioxidant Peptides After Simulated Gastrointestinal Digestion:
[11] The Nutritional Efficacy of Chlorella Supplementation Depends on the Individual Gut Environment: A Randomised Control Study:

**This is a subjective assessment based on the strength of the available informations and our estimation of efficacy.

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