A diet product’s worth depends on whether it actually helps people lose weight. Let’s find out if the 24-Day Challenge really works. Our in-depth review focused on the side effects, ingredients, scientific research and customer service quality. Furthermore, we sorted through hundreds of user comments from all over the web. Then we condensed and refined to give you the info you need.
What is the 24-Day Challenge?
First off, the 24-Day Challenge is a “comprehensive supplementation and nutrition program”  that is suitable for people of all body types. The primary purpose of this challenge is to help you jumpstart your body so you can reach your weight-loss goals. This involves six different elements and a daily guide. These include Herbal Cleanse,  AdvoCare Fiber, OmegaPlex, AdvoCare Spark, meal replacement shakes and MNS 3, C or E.
AdvoCare was founded back in 1993 and the 24-Day Challenge was released around 2013. Individual supplements and the kit are sold on the official website. We found some customer testimonials and some products contain natural ingredients, but read on…
Steep Price – “Too Expensive?”
The first issue was the total cost of the 24-Day Challenge supplements. “The actual price of the bundle is not presented on the website at all,” said our Research Editor. “However, we did find it on distributor websites such as Amazon and it’s offered at $189 (plus $7.49 for shipping).”
One dieter stated, “I could have achieved my goals (like I have done many times before) without shelling out $200+.”
Another user offered, “Did not help at all! What a waste of money.”
The price tag didn’t seem to be a problem for others. As one buyer says, “Money well spent.”
One commented, “It is worth the investment in yourself.”
24-Day Challenge Reviews – “Positive or Negative?”
There are many complaints posted online about the 24-Day Challenge ingredients. One customer commented, “I did not lose any weight. I did have more energy, but I also had headaches.” 
According to another dieter, “Followed all the instructions. only lost 5 pound total.”
Where there are negative comments there are positive ones. A dieter who tried the challenge said, “It really worked well. I had lots of energy.”
Another said, “No feeling of hunger. Doing well on this diet.”
Our research has proven that if there is a certain facet of a diet program that is bothersome, like negative customer comments, the likelihood of weight-loss for the long run is minimal because the customer won’t stick around.  So, if the 24-Day Challenge does result in too many dieter complaints, this could be a major concern. 
The Science – “Proven Effective?”
While there is “science” mentioned on the official website, we did not find any actual clinical studies. The website talks about “safe and effective ingredients,” but does not elaborate on how they are used for weight reduction. There is support for meal replacements as a means of reducing caloric intake.  We at DietSpotlight need to see documented scientific research that supports the weight-loss product and in this case we weren’t successful at linking branded Advocare products to proof, but there are tested ingredients shown to have positive effects on weight and metabolism. Also: read our Leptigen Weight-Loss Kit review »
The Bottom Line – Does the 24-Day Challenge Work?
So, are we ready to start losing weight with this one? First of all, it’s nice to see that this company has been around for many years. On the other hand, we would not recommend spending nearly $200 on the 24-Day Challenge supplements. There is really no evidence that this program works and better than a traditional meal replacements program.  And there are plenty of customer complaints that say it doesn’t. Also, this diet program requires you to take a lot of pills every day.
If you really want to get started dropping more pounds of fat, then we suggest you go with a weight-loss program or diet supplement that is backed by real science and won’t break your bank account.
Among the best products we’ve seen this year is one called Leptigen. This supplement uses a proprietary combination of four ingredients, which have been proven in published clinical studies to kick-start metabolism and encourage fat loss. Moreover, we haven’t found any customer complaints of harmful adverse effects and user comments posted online reveal people are seeing solid results.
Plus, we love the idea of Leptigen offering a Special Trial Offer, which is a good sign of confidence in the product.
Previous 24-Day Challenge Review (Updated October 10, 2014):
24-Day Challenge: What You Should Know
The 24 Day Challenge is a certain regimen to help people reach their weight loss goals in 24 days. This is a normal range for a challenge as some last a few days, like the 14 Day Açai Berry Cleanse, to a few weeks. It comes from the company, Avocare, who has been producing nutrition and health supplements for 17 years. Read this review to learn more about this program and its products to help you determine whether or not you want to use this to help you reach your weight loss goals.
List of Ingredients
Product Features of the 24-Day Challenge?
The 24-Day Challenge begins with a cleanse/detox that lasts for the first 10 days of the program. The Max phase is the second phase of the program, and it lasts from days 11 to 24. The first phase is designed to detoxify the body to help increase absorbency, and a sugar free energy drink. The challenge uses a cleanse similar to 7 Day Detox. Basically, this can help you get rid of cravings and increase energy levels to combat the fatigue associated with detoxification. The Special K Challenge also requires you diet from a selection of foods and products. The second phase is designed to help you start the momentum, so you can increase energy levels to affect calories out, while steering the appetite away from cravings for sweets, and high carbs, to affect calories in. You will get more of the energy drink, as well as a meal replacement shakes. Some shakes may be protein shakes like Herbalife 24 Rebuild Strength. If you get the “plus plan” there are additional products to help feed lean muscle so you don’t lose it while you’re burning fat. There are forms and documents on the website that will help you, such as meal planning, etc. to help you stay accountable and support. There are several different pricing points, depending on how involved in selling the product to others you are—it is possible to sell enough to make enough income to cover the cost of your own supply.
Advantages of the 24-Day Challenge
- 24-Day Challenge helps to address burning calories while also taking in fewer overall.
Disadvantages of the 24-Day Challenge
- 24-Day Challenge seems to be focused on offering a MLM sales scheme as much as they are selling a product.
- We do not see the ingredient lists for any of these products.
- We do not know if there is a money back guarantee for these products.
- These products claim to be endorsed by celebrities, but we do not see any proof outside of the YouTube promo video.
- There are no free trials of this product.
The 24 Day Challenge seems solid, but many things people try to sell you do seem that way at first. Products promising weight loss over days should always be scrutinized, sort of like 7 Day Weight Loss Pill. Without taking a closer look at the products themselves to see how they work and what their ingredients are, we cannot really comment on how effective they would be. This combined with the fact that they are trying to get you to start selling the product is a bit of a turn off for some people.
24-Day Challenge Questions & Answers:
We narrowed down hundreds of user comments about the 24 Day Challenge into this helpful FAQ.
What are the side effects of the 24 Day Challenge?
24 Day Challenge side effects, according to a few reviews, may include upset stomach, nausea and jitteriness, which could be associated with stimulants. 
What is in 24 Day?
The 24 Day Challenge, shortened to 24 Day, ingredients consist of vitamins, soluble fiber, chromium, choline, caffeine, l-tyrosine, taurine, l-carnitine, inositol, maltodextrin, citric acid, sucralose, silicon dioxide, whey protein concentrate, calcium caseinate, milk protein isolate, L-glutamine, L-lysine, L-leucine, L-isoleucine, L-valine and oolong tea.
What is the active in 24 Day Challenge?
The active ingredient in 24 Day Challenge depends on the product. For the Herbal Cleanse System it’s fiber, OmegaPlex it’s omega-3 fatty acids and AdvoCare Spark it’s vitamins.
Does the 24 Day Challenge work?
There’s no scientific research proving the 24 Day Challenge will help you lose weight. We noticed that some of the supplements contained proven ingredients, like caffeine, which is a start. 
How much does a bottle of 24 Day Challenge cost?
The 24 Day Challenge costs $195.70. You have the opportunity to add additional products at checkout.
How do you take the 24 Day?
You should take the 24 Day Challenge in two phases. The first consisting of a cleanse and the second being the max.
Can I take the 24 Day Challenge if I have a health condition?
Women who are pregnant or nursing, those taking prescription medications of any kind, people with medical conditions or those under 18 years of age should consult with a healthcare professional prior to using a weight-loss system, including the 24 Day.
What do users like about the 24 Day Challenge?
We found that users liked the variety of supplements available on the 24 Day Challenge and that the products are located on the official website.
What do users NOT like about the 24 Day Challenge?
Some users didn’t like the difficulty reaching the 24 Day Challenge customer service department and the high cost of the supplements.
Who makes 24 Day Challenge?
The makers of the 24 Day Challenge is AdvoCare.
How do I contact the 24 Day Challenge customer service department?
You can contact the 24 Day customer service department by using the customer feedback form on the official website, calling a representative at 1-800-542-4800 or mailing correspondence to AdvoCare International, LP 2801 Summit Ave. Plano, TX 75074.
Can I contact the 24 Day Challenge through social media?
What are the phases of the 24 Day Challenge?
The phases of the 24 Day include the cleanse phase and the max phase. The first lasting 10 days and the latter running to the end.
What is the daily recommended servings of water on the 24 Day Challenge?
The daily recommended serving of water is your body weight, divided by two, this is the number of ounces you will need to drink per day.
What tools and resources are available on the 24 Day Challenge?
The tools and resources on the 24 Day Challenge include the application available through the Apple store or the Google Play store.
Does the 24 Day Challenge come with a guarantee?
The 24 Day Challenge comes with a guarantee. You have 30 days to return the unused portion for a full refund. You will need to produce a sales receipt prior to sending the product back to the distributor. One that has our readers going crazy over the last few months is Leptigen. Click above to learn about the Special Trial Offer.
- 1. Caffeine in the diet (2015). MedlinePlus. June 3, 2016.
- 2. Body Weight Loss and Weight Maintenance in Relation to Habitual Caffeine Intake and Green Tea Supplementation (2005). Obesity. October 5, 2016.
24-Day Challenge User Tips:
Over the years, we’ve realized that the 24-Day Challenge users have something to say. Amid thousands of comments and reviews, these are some of the best tips to help prepare you for the challenge.
“Some people can change their eating habits; I couldn’t. In spite of my doubts about the value of the supplements, it motivated me to change my habits.” Amelia
“The biggest thing is to follow the directions and eat. It promotes a healthy metabolism so if you feel nauseous you need to eat more.” Diane
“I have so much energy and feel GREAT!!!! It WILL NOT work if you don’t follow the plan or if you’re not ready to make a LIFESTYLE change.” Julie
“The products are great but it’s also a life style change that comes with it AdvoCare is a nutrition company. Not a weight loss company. Therefore weight loss is a bi-product. My recommendation find someone who does the business and that you trust and let them guide you.” Javier
“The nutrition part is CRUCIAL, so clear out your cupboards, get the list of acceptable foods from the info packet from your rep, and use it as your grocery list. The eating schedule is pretty detailed so that helps a lot, just pack your meals and supplements for the next day the night before.” Seth
“I needed to get a jump start on my weight loss and the challenge did it for me. I had amazing results because you have to change your lifestyle along with taking the products.” Emily
“It’s not a quick fix to losing weight and if you’re looking for an easy way to do it, you’ll be disappointed. Losing weight takes time and discipline period and if you’re not willing to do that with or without the “help” of this product, you will fail every time.” Cheryl
24-Day Challenge Scientific Abstracts:
Arctium lappa (burdock) has been a traditional medicinal tool for hypertension, hepatitis, gout, and inflammatory disorders. Studies have shown that burdock roots contain anti-inflammatory, hepatoprotective, antiproliferative, and free radical scavenging activities. These hydroethanolic extracts were found to possess the strongest free radical scavenging activities. The dichloromethane extracts (from lappa root) had displayed antiproliferative traits against MCF-7, K562, and 786-0 human cancer cell lines. 
The potential for anti-cancer effects of ginger is very well documented and is due to the functional ingredients like school, gingerols, and parasols. These are all considered valuable elements that can prevent a broad range of cancers. It had been concluded for ginger, but some clarity is still needed to claim the correct efficacy. 
Studies based on the data which is available appear to be for beetroot as a powerful dietary source of health promoting agents as well as being a treatment for an array of pathological disorders. Beetroot’s immense anti-inflammatory, antioxidant and vascular-protective effects have been a demonstrated in detail by several in vivo and in-vitro studies using both human subjects and animals. In human trials, beetroot supplements have been said to decrease blood pressure, attenuate inflammation, avert oxidative stress, preserve endothelial functions and restore cerebrovascular hemodynamics. Several studies have also reported beetroot’s beneficial athletic performance capabilities. 
Verbal memory (VM) and visual memory (VsM) performance factors were better alongside larger concentrations of choline consumption in multivariable-adjusted models for verbal memory (average modification in neuropsychological factor per 1-unit change in choline = 0.60; 95% CI: 0.29, 0.91; P < 0.01). Isolated choline consumption was inversely related to –log-transformed white-matter hyperintensity (the average difference in log white-matter hyperintensity per 1-unit change in choline = −0.05; 95% CI: −0.10, −0.01; P = 0.02). It had been concluded that higher amounts of choline intake were related to improved cognitive performance while increased remote choline intake was associated with little to no white matter hyperintensity. 
There have been several in vitro studies involving multiple cell types which have shown beneficial effects when glycine is added. Glycine has also increased the health conditions of isolated perfused or stored organs. In vivo tests in animals have experimented with glycine as a protector molecule. At high amounts, glycine may cause toxic effects; there need to be more studies investigating the safe range of dosages of the amino acid as well as testing the pathways of administration. 
- 1. Antioxidative and in vitro antiproliferative activity of Arctium lappa root extracts (2011). BMC Compementary and Alternative Medicine. October 5, 2016.
- 2. Anti-Oxidative and Anti-Inflammatory Effects of Ginger in Health and Physical Activity: Review of Current Evidence (2013). International Journal of Preventative Medicine. November 1, 2016.
- 3. The Potential Benefits of Red Beetroot Supplementation in Health and Disease (2015). Nutrients. September 16, 2016.
- 4. The relation of dietary choline to cognitive performance and white-matter hyperintensity in the Framingham Offspring Cohort (2011). The American Journal of Clinical Nutrition. November 9, 2016.
- 5. Beneficial effects of the amino acid Glycine. (2016). Europe PMC. November 10, 2016.
24-Day Challenge Side Effects:
Taking a natural weight-loss supplement doesn’t mean a lack of negative reactions. Though the 24 Day Challenge side effects are quite rare, they still exist for some users.
Heart palpitations are a sensation of the heart skipping a beat or beating extra. Often, it feels like your heart is fluttering, pounding or racing. It may also be felt throughout the neck and chest area.
What causes heart palpitations?
Many things may cause heart palpitations. Often the cause is hard to identify.  Some causes of heart palpitations include:
- Strenuous exercise
- Changes in hormones
- Emotional responses, such as anxiety or stress
- Some medications
- Stomach pain
Pain in the stomach may feel dull, sharp, crampy, achy or even intermittent. It’s usually felt in one, localized area of the stomach region.
What causes stomach pain?
A common cause of pain in the stomach is ulcers. An ulcer is an open sore found on the stomach lining. If the pain is more of a cramp-like pain, it may be associated with bloating, diarrhea or constipation.
An unpleasant feeling in the stomach is often referred to as nausea. It’s often accompanied by the feeling of vomiting or actual vomiting.
What causes nausea?
Nausea may be caused by a number of different factors. Usually, the cause of nausea can be found by looking at when it occurred. It may be caused by food poisoning, an ulcer, bulimia or a reaction to something ingested.
A lightheaded, woozy feeling is often called dizziness. Many will feel unbalanced. While dizziness isn’t a disease, it’s a symptom of many disorders.
What causes dizziness?
Dizziness may be caused by a number of things. The list is very long and feeling dizzy is a symptom of many diseases and disorders. It may be caused by low blood sugar, low blood pressure, high blood pressure and a number of other disorders. 
Also known as hyperhidrosis, excessive sweating may be felt in the armpits, soles and palms. It’s a common issue many face and may cause you to avoid social situations due to embarrassment.
What causes excessive sweating?
Excessive sweating may be caused by a number of different factors. Emotional stress is one of the leading causes, while heart disease, diabetes, shock and lung disease also list excessive sweating as a symptom.
Side effects associated with the 24 Day Challenge are not guaranteed. Heart palpitations, stomach pain, nausea, dizziness and excessive sweating have all been reported, among others. Make sure to consult with a physician before taking any supplement or making any changes to your diet, especially if you’re pregnant, nursing, under the age of 18, have an existing medical condition or you’re currently taking prescription medication.
The 24 Day Challenge is a weight-loss system containing energy boosters, cleansers, and meal replacements. Side effects aren’t a guarantee, or common, but there are some users experiencing them.
“On day 7 of the cleanse phase my chest started to hurt and I started having heart palpitations. I talked to my distributor and she suggested to cut the Spark in half. I tried that and still had chest pain. On day 10 my neck and the inside of my ears started itching.” Lesli
“I began getting shooting stomach pains, cramping, and nausea. My glucose levels are THROUGH THE ROOF and I GAINED 5 pounds in the first 5 days.” Kimberly
“…I was so nauseated. Like puking my guts out. No matter how I took them (with meals without meals, before or after exercise) I was so sick. I quit with 7 days left because of the nausea.” Katie
“The heart palpitations, nausea, dizziness, and facial rash was severe enough that my husband requested 911 assistance.” Johanna
“But I started the challenge and it messed up my stomach so bad I was constantly cramping and couldn’t stay out of the bathroom.” Tiffany
“Did the cleanse because of peer presser from coworkers…Made 3 of us feel nauseous and dizzy on top of using the bathroom every 30-60 minutes with diarrhea.” Patrick
“I did however experience my heart racing after drinking Spark and the meal shake I thought it was just a small reaction and I would eventually get used to it but, one day I started shaking so badly and had a strong headache the paramedics came took me to the ER…” Lisa
“I had great energy and now I’m home in great pain in my ovaries, and gastric pain.” Heather
“…on day 14, “The Max Phase” I got very sick. Like intense sweating and pain in my abdomen… so bad I couldn’t walk. I am in college so my roommates rushed me to the doctor’s office, there I developed a rash from my neck down, and my throat started to constrict. I was rushed to the ER…” Megan
“30-45 minutes after I did [drink the spark shake] I began to feel lightheaded, dizzy, heartbeat racing, increased pulse in my blood pressure shot up. I ended up at ER…They thought I was going to have either a stroke or heart attack.” Paula
If you are looking for a supplement with clinically-tested ingredients that promote weight-loss without the harmful side effects, Leptigen may be for you. It is one of the top fat burners out there with amazing user reviews.
The 24-Day Challenge is a weight-loss plan from Advocare. The first phase is a cleanse and the second is to fuel the body. There are multiple supplements in the line, including Herbal Cleanse System, OmegaPlex, Advocare Spark, MNS and Meal Replacement Shake. Complimentary products include Catalyst, ThermoPlus, Carb-Ease Plus and a series of workouts.
24-Day Challenge Ingredients and Supplement Facts
Serving Per Container: Varies
|Amount per Serving||% DV|
|- Senna Extract||*||*|
|- Cranberry Juice Powder||*||*|
|- Burdock Extract||*||*|
|- Astragalus Extract||*||*|
|- Milk Thistle Extract||*||*|
|- Scisandra Extract||*||*|
|- Beet Root Powder||*||*|
|- Odorless Garlic Bulb Powder||*||*|
|- ProBiotic Culture||4 Billion||*|
|- Vitamin E||6IU||20%|
|- Eicosapentaenoic Acid||600mg||*|
|- Docosahexaenoic Acid||400mg||*|
|- Citrus Flavonoids||100mg||*|
|- Green Tea Leaf Extract||100mg||*|
|- Garlic Powder||50mg||*|
|- Alpha-Lipoic Acid||10mg||*|
|- Coenzyme Q10||100mg||*|
|- Shave Grass Extract||50mg||*|
|- Ginger Extract||25mg||*|
|- Guarana Extract||300mg||*|
|- ThermoGen HC||112mg||*|
|- Cayenne Powder||16mg||*|
|- Oolong Tea Extract||500mg||*|
|- Guggul Gum Resin||50mg||*|
|- Probiotic Culture||2 Billion||*|
Other Ingredients: Microcrystalline cellulose, croscarmellose, sodium, stearic acid, silicon dioxide, maltodextrin, aqueous coating, (hydroxypropyl methylcellulose, hydroxypropyl cellulose, polyethylene glycol, glycerin, chlorophyllin copper complex sodium, sodium citrate, dextrose, lecithin (soy), sodium carboxymethylcellulose), magnesuim stearate, calcium phosphate, ethyl cellulose, dextrose, gelatin, rice flour, natural lemon flavor, titanium dioxide
We dug deep into the 24 Day Challenge ingredients to give you the details you need.
Advocare Spark contains Vitamin A, Vitamin B12, and Vitamin E. Other natural ingredients are added and vary depending on flavor. This product is used throughout the entire program.
What is it Supposed to Do?
Advocare Spark is supposed to enhance mental energy and focus.
According to a study published in Nutrition Reviews, “Folate is a water-soluble B-vitamin and enzymatic cofactor that is necessary for the synthesis of purine and thymidine nucleotides and for the synthesis of methionine from homocysteine. Impairment of folate-mediated one-carbon metabolic pathways can result from B-vitamin deficiencies and/or single nucleotide polymorphisms, and increases risk for pathologies, including cancer and cardiovascular disease, and developmental anomalies including neural tube defects.” 
This is used during the first phase of the program – days 1 through 10. It includes Herbal Cleanse, Probiotic Restore, and Advocare Fiber.
What is it Supposed to Do?
It is supposed to help you get rid of waste in your body and help prepare the body for optimal nutrient absorption.
According to a study published in The Lancet, “Lactobacillus GG [one of the most common probiotics] was effective in prevention of early atopic disease in children at high risk. Thus, gut microflora might be a hitherto unexplored source of natural immunomodulators and probiotics, for prevention of atopic disease.”
This product is rich in fiber and provides 10 grams per serving.
What is it Supposed to Do?
It is supposed to support intestinal function and enhance nutrient absorption, while also providing a feeling of fullness that may help curb the appetite.
According to a study published in Nutrition Reviews, “Individuals with high intakes of dietary fiber appear to be at significantly lower risk for developing coronary heart disease, stroke, hypertension, diabetes, obesity, and certain gastrointestinal diseases. Increasing fiber intake lowers blood pressure and serum cholesterol levels. Increased intake of soluble fiber improves glycemia and insulin sensitivity in non-diabetic and diabetic individuals. Fiber supplementation in obese individuals significantly enhances weight loss.”
This is also used during the cleanse phase of the diet, for the first 10 days. It is blend of omega 3 fatty acids.
What is it Supposed to Do?
Omega 3 fatty acids are essential for nerve, heart, muscle, skin, bone, and immune health.
Meal Replacement Shakes
These provide 22 to 24 grams of protein, 24 grams of carbohydrates, 5 to 6 grams of fiber, and 26 vitamins and minerals.
What is it Supposed to Do?
These act as a nutritious meal replacement for use on days 11-24.
MNS 3, C, or E
Metabolic Nutrition System (MNS) is used during the second phase of the program on days 11-24. You can choose from 3, which is the base level for appetite control and energy, C, to provide better appetite control, and E for more energy levels. All formulas include a multivitamin, omegaplex, and probiotics.
What is it Supposed to Do?
The are supposed to provide sustained energy, appetite control, and core nutrition.
Clinical research is an important part of the equation when it comes to choosing a diet supplement. You may want to take a look at a product like Leptigen, which is formulated with clinically tested ingredients. Click above to learn more.