Many people are familiar with the benefits and support that Phentermine can offer men and women who need to lose weight for medical reasons. This powerful drug has incredible effects on the body, helping consumers to lose 5% to 10% of their body weight. Unfortunately, because of the chemical composition, there is a substantial risk of addiction that some consumers aren’t prepared to take on. Phentermine alternative supplements seem to be the answer.

These supplements can help consumers get the same appetite-inhibiting effects that Phentermine offers, but with natural ingredients that aren’t nearly as aggressive. Most components have the same benefits as Phentermine and can be purchased without a prescription. The industry is filled with weight loss medications, but only a fraction of those products perform the way they claim.

In this guide, consumers will learn about the top weight loss products on the market that mimic Phentermine’s effects.

Ranking The Top Phentermine Alternative Supplements

While there are a lot of products that could be contenders for the top spot, there are only five products that this guide found to be comparable to Phentermine’s effects. The top phentermine alternative supplements include:

  • PhenQ
  • PhenGold
  • Phen24
  • PhenAprin
  • Phena-Lean

Read on below to learn more information about these products:


PhenQ is a combination of 5 weight-loss ingredients helping over 190,000 customers to lose weight since it was launched. Of all of the products available online for weight loss, this product is a best-seller, and it can help anyone to get the physique they want. Appetite suppression is its primary function (like Phentermine), but it also supports a balanced mood and improved energy levels.

The main reason that PhenQ stands so tall above the rest is the collection of beneficial ingredients, including a proprietary blend called Capsimax. In Capsimax, users get caffeine, piperine, capsicum, and niacin, combined with the support of alpha-Lacys Reset, chromium, caffeine, nopal, and L-carnitine. The idea is that this supplement will trigger thermogenesis, which warms the core temperature of the body to cause more calories to be burned. This is among the top products to recreate Phentermine effects, and the brand even offers a meal replacement shake for a more aggressive approach to weight loss.


PhenGold is the new formula on this list, providing users with a way to improve fat burning. It controls cravings, enhances metabolism, and supports the user’s mood. It keeps their energy levels up, and users have reportedly lost 21-30 lbs. in about three months of use. Swiss Research Labs Limited produces it.

This formula is exclusively made with ingredients proven effective through many studies, helping consumers regulate their hormones properly. The elements include caffeine, L-tyrosine, Rhodiola Rosea, green tea, and capsaicin.


Phen24 helps users remain in thermogenesis all day, even while they sleep. While Phentermine is primarily used as an appetite suppressant, a substantial number of weight loss medications choose to focus on metabolism instead. Consumers will need to use Phen24 daily to keep their thermogenesis working. Considering the slow metabolism that many overweight people have, this change can help consumers regulate processes that might be holding them back.

The main reason this formula is so helpful to consumers who want to lose weight is the active ingredients. The active ingredients include caffeine, guarana extract, and cayenne powder. Every order comes with free shipping.


PhenAprin offers a unique remedy for weight loss, though it targets the appetite in the same that Phentermine can. The formula is provided at a discounted price, allowing Amazon shoppers to get a great deal. Produced by Sutra health, this formula is used to help both men and women to keep their appetite under control for weight loss. It supports a better mood, promotes focus, and increases mental and physical energy. The creators note that these changes can help users encourage better weight loss success.

Caffeine is the stimulant of this formula, which L-taurine complements to reduce jitters. Then, users get the support of L-carnitine, theobromine, and L-phenylalanine. This formula uses a proprietary blend to get help and has received many positive user comments.


Phena-Lean is the final product in this guide, and consumers can also find it on Amazon. With over 1,000 reviews on Amazon, this phentermine alternative supplement comes from Anabolic Warfare to provide a high-value remedy that doesn’t have a high price. Luckily, it helps consumers to improve energy levels, increase metabolism, reduce their appetite, and promote better fat-burning power.

To get these benefits, consumers will ingest vitamin B3, L-theanine, L-tyrosine, vitamin B3, and ginseng with every single serving. With this combination, consumers will be relieved that they won’t lose any muscle mass.

Deciding How to Rank the Top Phentermine Alternative Supplements

Any product that likens itself to Phentermine can help with weight loss. However, each one is much different from the next, and this guide had to follow specific criteria to ensure that the formula was the best available.

Science-Backed Weight Loss Ingredients

Every ingredient used had to be effective, and the only way to ensure these ingredients were effective was to look for ingredients with scientific evidence. With all the research available, it is easy to see what elements can improve the appetite or regulate the metabolism. The top products found in this guide have to contain ingredients that have been proven to enhance weight loss.

Effective Dosages

Along with the inclusion of ingredients that will work, the creators had to include enough of those ingredients to make a significant difference. The correct dosage ensures that users get enough to make a difference but not so much that they overwhelm their bodies.

Realistic Claims of Benefits

Even if an individual has the best ingredients in the proper dosages, the creators of the supplement have to be realistic about what their product can do. Supplements that claim that weight loss is possible without ever dieting or exercising, it is best not to trust it. The top phentermine alternative supplements worked best when combined with healthy habits.

Manufacturer Reputation

Every formula in this guide comes from a company that has proven itself to be reliable. While other companies are newer in the market, that wouldn’t necessarily rule them out. If the brand performs well and seems favorable among customers, it is considered for this list.

Price & Value

Everyone wants a product they can afford, so this guide has a range of prices available. However, having a low price wasn’t the priority because the formula had to offer equal value for its cost. That’s why users will see more expensive products that perform well and lower prices on more spartan products.

Lab Testing

Phentermine is a powerful drug, meaning that the supplements that claim to offer similar benefits must be careful about how they support consumers. The formulas here went through third-party testing to ensure that each one was as potent as they’ve said, while less successful products avoid these lab tests for lack of funding and (sometimes) a lack of honesty. Some companies have even been more elusive, sneaking actual Phentermine into their products.

Created by Doctors or Other Health Professionals

While having a doctor on staff isn’t required, dealing with phentermine alternative supplements can be complicated. Putting a professional on the staff of these brands is a helpful way to ensure that ingredients are reliable and effective, reducing the risk of a bad reaction. A medical advisory team ensures that users get a product made by people who understand how to put together a quality supplement rather than a group of advertisers who only have the bottom line in mind.

Satisfaction Guarantee

No one should be stuck with a product that doesn’t work for them, which is why the only way a product could rank on this list is if it had some return policy. The top creators anticipate that their remedies will work for a broad audience, but they want to ensure that consumers are satisfied. While some products only offered a small window, others might allow up to a year to return the formula.

What is Phentermine?

The Food and Drug Administration approved Phentermine as a weight loss medication in 1959, allowing the world to stimulate extra fat-burning power for decades. Since it is a medication, consumers can only procure it if they qualify for a prescription from their doctor. Even though it has been around for so long, it only just started to surge in popularity with the rise of the slim figure in the 1990s.

At the time, consumers started to use Phentermine with other medications and drugs to push for more aggressive weight loss. Unfortunately, heart problems began to arise, and the Food and Drug Administration decided to pull two drugs that use it as their active ingredients – fenfluramine and dexfenfluramine.

Other brands for Phentermine include Adipex-P, Lomaira, and Suprenza. Qsymia offers Phentermine as one of its ingredients.

How Does Phentermine Work?

The whole point of Phentermine is to help as an appetite suppressant, which inhibits the trigger in the brain that tells someone they are hungry. It makes users feel less hungry, making them less likely to overeat. Less hunger leads to less eating, so consumers naturally consume fewer calories. This calorie deficit is exactly what consumers have to create to start the weight loss process, according to studies like this one.

To reduce the user’s appetite, Phentermine goes after the neurotransmitters in the brain. Despite having approval from the Food and Drug Administration, researchers aren’t clear on how these neurotransmitters interact with the medication. Instead, they understand that the natural serotonin, dopamine, and norepinephrine levels rise.

These neurotransmitters are already produced naturally by the body after eating, which is why so many consumers feel good when they eat an indulgent meal. Increasing neurotransmitters can help the body feel satisfied without eating all the food that would naturally elicit this response.

Obtaining a Prescription for Phentermine

Typically, doctors will only prescribe Phentermine to obese patients in the interest of their health. The chemical similarities make it a controlled substance under the eyes of the law, so consumers cannot buy it outright. This medication is sometimes prescribed for issues with high blood pressure, diabetes, and high cholesterol if the user’s weight impacts it.

If individuals believe they could benefit from a phentermine prescription, they should speak with their doctor to make an informed decision.

Who Are Phentermine Supplements Good For?

Much like Phentermine, a phentermine alternative supplement is often recommended for consumers who want to lose weight. Some users that benefit the most from phentermine supplements include:

  • People who want to trigger the weight loss process quickly.
  • Anyone reaching a plateau that they are trying hard to overcome.
  • Someone trying to achieve their goal weight.
  • Anyone who wants to feel and look like your best self.

What Side Effects Can Phentermine Alternative Supplements Cause?

When consumers enter their regimen in an otherwise healthy state, they won’t typically experience any adverse side effects. The whole point of this remedy is to help consumers improve their weight loss results, but some mild reactions that consumers might have are:

  • Nausea
  • Headache
  • Digestive issues

The current regulations of the Food and Drug Administration require that these companies only use ingredients and dosages that are already Generally Recognized As Safe (GRAS), which means that the ingredients have already been researched and approved to be safe. Even consumers who experience these side effects are rare.

On the other hand, Phentermine comes with many side effects, including the risk of addiction.

Dosages for Phentermine Alternative Supplements

The majority of phentermine prescriptions offer about 27.5mg of the active ingredient. In a review of six studies on phentermine use, researchers found that this dose is the typical concentration for consumers to lose weight over 13 weeks. The patients who used it lost nearly 14 lbs. during this time.

When it comes to a phentermine alternative supplement, many different ingredients can be involved with varied concentrations. While they don’t have Phentermine, other ingredients help with weight loss.

The dosage depends entirely on the collection of ingredients involved, but most supplements require 1-2 capsules to get the desired results. Users should consider the caffeine in this dosage because some formulas contain as much as 300mg. Some people are sensitive to the jittery effects of caffeine, which may impact consumers with heart medications. Consumers with either of these issues should consult a doctor before using any weight loss supplement with caffeine.

Weight Loss: Phentermine vs. Alternative Supplements

The biggest priority with these two types of products is weight loss. If an individual is prescribed Phentermine to help with their weight loss, they can lose about 5% to 10% of their weight. For instance, if they start their regimen at 200 lbs., consistent use might lead to a loss of 10-20 lbs.

A phentermine alternative supplements effectiveness is the only downside compared to the real thing. Because this formula is not a medication, there is no way for consumers to have a sense of certainty. However, some products offer reviews that claim 60+ lbs. lost or more. Exaggerated weight loss claims should be overseen, but it isn’t impossible to see a drastic change. These supplements are more effective when combined with healthy habits – like a better diet and more exercise.

Phentermine is sometimes combined with other medications that might amplify the results, including topiramate. This anti-seizure medication can help users to feel even less hunger, doubling down on the natural effects of Phentermine. Based on this study, it might be possible to lose about 21.6 lbs. annually.

Benefits of Phentermine

As a prescription medication, consumers will find many benefits in using Phentermine if their doctor decides to take this path to improved wellness. Weight loss is the primary benefit, but consumers can also:

  • Promote better insulin sensitivity.
  • Reduced waist measurement.
  • Increases control over glucose levels.
  • Improves cholesterol levels.
  • Reduce the struggle with some eating disorders.

Phentermine supplements are much different, allowing users to get a full entourage effect of the herbs and plants used.

Does Science Back Up the Use of Phentermine?

Researchers have consistently examined how using medication for weight loss, like Phentermine, could make a difference for users. The results have been extensive, seeking ways to show how much users can benefit. In this study and many others, users lost up to 10% of their body weight as they maintained their use, while another study found about 13.9 lbs. lost during that time.

Using Phentermine with the anti-seizure drug topiramate can also help with weight loss. They are combined with the same medication in Qsymia, which one study says is substantially more effective than Phentermine. Another study confirmed this effect, showing that it gave users the highest chance of weight loss success.

With the way that Phentermine supports weight loss, researchers found that most users have a smaller waist measurement, improved sensitivity to insulin, and better control over blood sugar levels. In a separate study, participants in this medication were also able to reduce cholesterol levels for a healthier heart.

Consumers with an eating disorder sometimes receive a prescription from their doctor to help. A study that reviewed the course over 12 weeks found that individuals with binge eating disorder (BED) could drastically lower weight, BMI, and binge eating episodes. Researchers also confirmed that binge eating was reduced by 75% after one month of using it with topiramate, as seen in this study.

Increasing Weight Loss with Phentermine or Alternative Supplements

The best way to help with weight loss, regardless of using a supplement or medication, is to improve lifestyle habits. They need to improve how they live to notice a lasting change.

Some ways that science has proven to be effective for weight loss include:

Eating a diet with fewer calories. Dropping just 300 calories from the daily intake of someone’s routine is enough to keep losing weight.

Include low-calorie foods that are rich in helpful nutrients. The easiest way to get this support is to add more fruits and vegetables. Find foods with plenty of fiber, vitamins, and minerals to improve weight loss.

Improve exercise. To improve weight loss, the average person should get about 150 minutes of aerobic activity weekly.

Change lifestyle habits. Making a change in behavior is the most intelligent way to get ahead of weight issues with lasting effects. Food intake should be watched, as well as how much exercise someone endures during the week.

Generally, phentermine use is entirely safe. Some people experience side effects like dizziness, sleeping issues, and heart palpitations. Skin flushing, fatigue, constipation, irritability, and dry mouth have also been reported.

How Do Phentermine Alternative Supplements Work?

First and foremost, phentermine alternative supplements do not share any qualities with Phentermine beyond the increased likelihood of weight loss. These remedies don’t have the same formulas or related ingredients, and a mutual company doesn’t make them. However, if the formula is worth what it offers, it includes helpful elements that can push for weight loss.

These supplements use proven ingredients; nothing is the same as caffeine, green tea extract, and even oleuropein. According to this study, these ingredients can benefit people who want to suppress their appetite, mimicking a primary benefit of Phentermine.

Caffeine has consistently been an effective remedy for people who want to lose weight, and most people already get it in their coffee and other sources. Caffeine has been a proven ingredient to promote improved metabolism, ensuring that consumers can burn more calories than they usually would. That’s why it is involved in so many different phentermine alternative supplements, as it increases the ability to burn through fat.

In a 2019 review, researchers looked over the many different research studies on the use of caffeine. This review found numerous controlled trials that caffeine could consistently reduce weight, improve BMI, and reduce excess fat. When the users doubled their intake, the participants in the study increased their weight loss even more.

Some of the phentermine alternatives supplements in this guide included an active ingredient typically sourced from cayenne pepper. It has been reviewed in many studies, including one in 2017 that linked it to anti-obesity effects. The following year, a study confirmed that capsaicinoids could reduce body fat and fat mass by increasing thermogenesis. This process resulted in more calories burned for more effective weight loss.

Suppressing the appetite is the key to effectiveness with all of the formulas in this guide, which is why fiber supplements are so successful. As the individual soaks up the water in the user’s stomach, they naturally feel as full as they would after a larger meal. A 2019 study confirmed that using fiber for weight loss could help, showing that participants had an easier time sticking with calorie-restrictive diets that would ordinarily increase their hunger.

One of the best ways to suppress your appetite (like Phentermine) is by taking a fiber supplement. Fiber soaks up water in your stomach, tricking you into feeling full. There’s a reason many weight loss experts recommend taking fiber for weight loss. In this 2019 study, researchers found that fiber intake made it easier for adults to stick to calorie-restricted diets. Adults found it easier to stick to a low-calorie diet and lose weight by taking a fiber supplement.

Frequently Asked Questions About Phentermine Alternative Supplements

Q: How much weight will consumers lose within the first week of using Phentermine?

A: Most consumers initially lose about 7 lbs. as their body gets used to the changes that come with this medication.

Q: How much weight loss is possible with Phentermine?

A: By taking Phentermine on a consistent schedule for 3-4 months, consumers can potentially use 5% to 10% of their body weight.

Q: How long will consumers have to continue using Phentermine before seeing a difference?

A: After being ingested, the effects will occur 3-5 hours after. The user will feel like their appetite is more suppressed when it activates. Keeping a healthy diet is beneficial to get the best results, helping consumers lose weight within the first few days. Many consumers report that they can lose about 7 lbs. in one week.

Q: Can I drink caffeine with Phentermine?

A: Since Phentermine is already a stimulant, combining it with caffeine can lead users to experience jitters, a speedier heart rate, and even insomnia. Both of these ingredients are also used for weight loss support, and consumers might want to speak with their doctor to ensure that there will be no conflict.

Q: Is it possible to lose 20 lbs or more in a month with Phentermine?

A: If the user takes Phentermine for 3-4 months consistently, it is possible to lose 20 lbs. if the individual is already at a higher weight. The formula is meant to help users lose 5% to 10% of body weight.

Q: Will Phentermine make foods taste different?

A: One of the consumers’ biggest complaints about Phentermine is that it can cause users to have bad taste in their mouth, a common side effect. However, the current research on this substance shows that it won’t permanently affect the taste buds.

Q: What side effects can occur with phentermine use?

A: The side effects of phentermine use could include constipation, dry mouth, diarrhea, vomiting, or nausea.

Q: Is it safe to exercise while taking Phentermine regularly?

A: Yes. Exercising while using any weight loss medication is often highly effective in promoting weight loss.

Q: Why is the user still hungry after they take Phentermine?

A: The appetite cannot be entirely silenced, even though Phentermine is highly effective. Making dietary changes might be helpful to users who want to reduce their appetite more.

Q: Is it safe to use two phentermine doses daily?

A: The only way to be safe while using a phentermine supplement is to follow your doctor’s instructions. Using two doses at a time is not typically recommended.

Q: What is Phentermine?

A: Phentermine is one of several medications for consumers who want to lose weight. It causes appetite suppression to create a calorie deficit naturally.

Q: How does Phentermine work?

A: As the bloodstream absorbs the active ingredients in the medications, the brain naturally increases dopamine, serotonin, and norepinephrine production.

Q: Is a prescription necessary for phentermine use?

A: Yes. It cannot be distributed without a prescription written by a doctor.

Q: Will health insurance cover the cost of Phentermine?

A: Most health insurance plans do not cover Phentermine or any other obesity drug. According to NPR, insurers avoid this expense because the obesity drug might be taken for the patient’s life, adding to significant costs paid by the insurance company.

Q: What is fen-phen?

A: Originally, the launch of fen-phen (or fenfluramine) was meant to help with weight loss by improving the effect of Phentermine. Fen-phen was banned by the Food and Drug Administration when users started reporting heart failure as a side effect.

Q: Are phentermine use and distribution legal?

A: Yes. While it is a controlled substance, it can be obtained legally from a pharmacy with a doctor’s prescription.

Q: Why does Phentermine require that users get a prescription?

A: This medication is pretty similar to the chemical composition of amphetamine, which means that there’s a risk of abusing it.

Q: Can Phentermine be addictive?

A: Many believe that consumers can become addicted to Phentermine because of its chemical composition. However, a study in 2013 discovered that users had no withdrawal symptoms, even if they’d taken Phentermine for years.

Q: How do users take Phentermine?

A: Phentermine is available as a tablet, and users often need to take it at least once daily for the benefits. It is best to speak with a doctor for instructions.

Q: Is Phentermine helpful for weight loss?

A: Yes. Few products are as popular as Phentermine for weight loss.

Q: What is a phentermine alternative supplement?

A: These supplements help to give users the same weight loss benefits that Phentermine can. Phentermine is a prescription for weight loss that inhibits appetite.

Q: How does a Phentermine alternative work?

A: These alternative supplements typically provide users with natural ingredients, vitamins, and minerals that promote weight loss. They often stimulate weight loss by suppressing the appetite, reducing hunger, increasing metabolism, and other functions.

Q: Is it legal to purchase or buy a phentermine alternative supplement?

A: Yes. Any adult, like other supplements, can take these supplements. By law, they don’t have any banned ingredients, and they do not use controlled substances.

Q: Where can consumers purchase phentermine alternative supplements?

A: While Phentermine can only be picked up from a pharmacy with a prescription from a doctor, phentermine alternative supplements can be found online and in stores without even getting a recommendation from a medical professional.

Q: What brand names are available for Phentermine?

A: Adipex-P, Suprenza, and Lomaira are all brand names for Phentermine.

Final Thoughts on The Top Phentermine Alternative Supplements

As one of the most popular weight loss drugs ever made, Phentermine is consistently capable of helping consumers to lose weight quickly. Finding a similar effect can be done with less aggressive ingredients and fewer side effects in phentermine alternative supplements. The top phentermine alternative supplements in this guide consistently show that they are effective, and each comes with a money-back guarantee and value-based price.

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Please understand that any advice or guidelines revealed here are not even remotely substitutes for sound medical or financial advice from a licensed healthcare provider or certified financial advisor. Make sure to consult with a professional physician or financial consultant before making any purchasing decision if you use medications or have concerns following the review details shared above. Individual results may vary and are not guaranteed as the statements regarding these products have not been evaluated by the Food and Drug Administration or Health Canada. The efficacy of these products has not been confirmed by FDA, or Health Canada approved research. These products are not intended to diagnose, treat, cure or prevent any disease and do not provide any kind of get-rich money scheme. Reviewer is not responsible for pricing inaccuracies. Check product sales page for final prices.