Free Shipping in U.S.


Buy with PRIME

Free Shipping in U.S.

Buy with PRIME

5-HTP for Weight Loss: Uncovering the Truth Behind the Hype

Written by: MoxyVites Editorial Team



Time to read 10 min

In the quest for effective weight loss solutions, 5-HTP has garnered significant attention for its potential to promote feelings of satiety and reduce appetite. As obesity rates continue to rise globally, many individuals struggling with weight management are seeking natural alternatives to support their weight loss journey. 5-HTP, or 5-hydroxytryptophan, is an amino acid precursor to serotonin, a neurotransmitter that plays a crucial role in regulating mood, sleep, and appetite.

This article delves into the science behind 5-HTP and its potential applications for weight loss. It explores the mechanisms by which 5-HTP may influence appetite control, including its effects on ghrelin, a hormone that stimulates hunger, and its impact on gastric motility and emptying. The article also examines the existing research on 5-HTP's efficacy in promoting weight loss and its potential benefits for related conditions such as insomnia, depression, anxiety, and panic disorder. By presenting a comprehensive overview of the current knowledge on 5-HTP and weight loss, this article aims to provide readers with the information they need to make informed decisions about incorporating 5-HTP supplements into their weight management strategies.

Understanding 5-HTP and Weight Loss

5-Hydroxytryptophan (5-HTP) is an amino acid that occurs naturally in the body. It is synthesized from the essential amino acid tryptophan, which is obtained from food [1]. 5-HTP is the immediate precursor of serotonin, a neurotransmitter that plays a crucial role in regulating mood, sleep, appetite, and pain sensation [2].

What is 5-HTP?

5-HTP is produced commercially from the seeds of an African plant known as Griffonia simplicifolia [3]. It works in the brain and central nervous system by increasing the production of serotonin [3]. 5-HTP supplements have become increasingly popular due to their potential benefits in promoting weight loss and improving various health conditions related to low serotonin levels [4].

Role of Serotonin in Weight Management

Serotonin is believed to play a significant role in appetite control and weight management. Low serotonin levels have been associated with increased appetite, cravings for carbohydrates, and obesity [5]. Serotonin helps regulate appetite by increasing feelings of fullness and reducing food intake [6]. It also influences the body's metabolism and energy balance [7].

Several studies have investigated the effects of 5-HTP on weight loss:

  1. In one study, 20 people with diabetes who received 5-HTP consumed approximately 421 fewer calories per day compared to the placebo group [8].
  2. 5-HTP primarily inhibited the intake of calories from carbohydrates, which was associated with better blood sugar control [8].
  3. Many other studies have found that 5-HTP increased feelings of fullness and aided weight loss in people with overweight or obesity [9].
  4. An animal study suggested that 5-HTP could reduce excessive food intake due to stress [10].

5-HTP as a Serotonin Precursor

5-HTP is the immediate precursor of serotonin in the body. It is converted to serotonin by the enzyme aromatic L-amino acid decarboxylase (AADC) [11]. By increasing the availability of 5-HTP through supplementation, the body can produce more serotonin, potentially leading to improved appetite control and weight management [12].

However, it is essential to note that while 5-HTP shows promise in aiding weight loss, more research is needed to fully understand its long-term effects and optimal dosage. Consulting with a healthcare professional before starting any new supplement regimen is always recommended.

Scientific Research on 5-HTP and Weight Loss

Numerous studies have investigated the potential of 5-HTP in promoting weight loss and its effects on various physiological mechanisms related to appetite and satiety.

Overview of Key Studies

In a study involving 20 overweight individuals with type 2 diabetes, participants who received 5-HTP consumed approximately 421 fewer calories per day compared to the placebo group [8]. The reduced calorie intake was primarily attributed to a decrease in carbohydrate consumption, which was associated with improved blood sugar control [8].

Several other studies have also demonstrated that 5-HTP supplementation can increase feelings of fullness and support weight loss efforts in overweight or obese individuals [9]. An animal study even suggested that 5-HTP could help reduce excessive food intake triggered by stress [10].

Impact of 5-HTP on Appetite Reduction

The appetite-suppressing effects of 5-HTP are believed to be mediated by its influence on serotonin levels. Serotonin plays a crucial role in regulating appetite, and disturbances in serotonin signaling have been linked to obesity and increased hunger [6].

A study using functional magnetic resonance imaging (fMRI) found that individuals who received 5-HTP supplementation exhibited increased brain activity in regions associated with healthy body weight and a preference for protein-rich foods [6]. This suggests that 5-HTP may help reduce cravings for high-carbohydrate foods and promote healthier food choices.

Effects on Gastric Emptying and Satiety Hormones

Research has also explored the impact of 5-HTP on gastric emptying and the secretion of satiety-related hormones. In a study combining 5-HTP with different fatty acids, gastric emptying was delayed when 5-HTP was administered with butter, while it remained normal when combined with olive oil [17]. However, 5-HTP supplementation alone did not significantly affect gastric emptying [17].

The same study found that food intake increased plasma levels of cholecystokinin (CCK), a hormone associated with satiety, regardless of the type of fatty acid consumed [17]. Interestingly, ghrelin levels, an appetite-stimulating hormone, significantly decreased when 5-HTP was combined with olive oil [17].

These findings suggest that the interplay between 5-HTP, different fatty acids, and satiety hormones is complex and requires further investigation to fully understand their effects on appetite regulation and weight management.

Practical Applications of 5-HTP Supplements

5-HTP supplements have become increasingly popular for their potential benefits in promoting weight loss and improving various health conditions related to low serotonin levels [4]. When considering the practical applications of 5-HTP for weight management, it is essential to understand the recommended dosages, potential synergistic effects with diet and exercise, and safety considerations.

Recommended Dosages for Weight Loss

While there are no official recommendations on how much 5-HTP you should take, various studies have used specific doses for weight management purposes [29]. A common dosage range is 250–300 mg, taken 30 minutes prior to each meal, or a daily total of 750 mg [29]. It is crucial to start with a lower dose and gradually increase it to minimize the risk of side effects [29].

Synergistic Effects with Diet and Exercise

5-HTP supplements can be an effective tool for weight loss when combined with a balanced diet and regular exercise. Studies have shown that 5-HTP may lead to reduced calorie intake, even without conscious dieting efforts, by increasing feelings of fullness and satiety after meals [29]. This effect can be particularly beneficial for those struggling with carbohydrate cravings and overeating [8].

Incorporating 5-HTP into a comprehensive weight loss plan that includes healthy eating habits and physical activity can potentially enhance results. However, it is essential to remember that supplements alone cannot replace the benefits of a well-rounded lifestyle approach to weight management.

Considerations and Safety Profile

When considering the use of 5-HTP supplements for weight loss, it is crucial to be aware of potential side effects and safety concerns. Some common side effects may include nausea, diarrhea, vomiting, and stomach pain, which tend to be dose-dependent [29]. To minimize these risks, it is advisable to start with a low dose and gradually increase it as needed [29].

It is also essential to consult with a healthcare provider before starting any new supplement regimen, especially if you are taking medications that increase serotonin levels, such as antidepressants, cough medicines, or prescription pain relievers [29]. Combining 5-HTP with these medications may lead to dangerous serotonin levels in the body, a condition known as serotonin syndrome [29].

Pregnant women, breastfeeding mothers, and individuals with liver disease should avoid taking 5-HTP supplements [32]. Additionally, those scheduled for surgery should discontinue use at least two weeks prior to the procedure, as 5-HTP may interfere with certain drugs used during surgical procedures [33].

By understanding the recommended dosages, potential synergistic effects, and safety considerations, individuals can make informed decisions about incorporating 5-HTP supplements into their weight loss journey. However, it is always advisable to consult with a healthcare professional to determine if 5-HTP is a safe and appropriate option for individual needs and circumstances.

User Experiences and Success Stories

Real-life experiences shared by individuals who have used 5-HTP for weight loss provide valuable insights into its potential effectiveness and challenges. Many users report positive outcomes, such as reduced cravings, improved mood, and successful weight loss [37].

Real-Life Weight Loss Journeys

One user, Brent, shared his transformative experience with 5-HTP. After struggling with severe post-viral illness and weight loss, he found that 5-HTP helped stop the decline and alleviate his symptoms. Starting with a low dose of 15 mg, he gradually increased to 100 mg daily, which allowed him to eat again, improve gut motility, and maintain blood pressure without compression socks [37].

Another success story comes from Heather Miars, who started taking 5-HTP for mood improvement under the guidance of Dr. Bhatia. She was able to discontinue prescription antidepressants and lost 15 pounds in the process [35].

Audra Holmes, who experienced severe mood swings, found relief with 5-HTP. She reported no longer having extreme highs and lows, and was able to get through the day without naps or comfort food. As a result, she lost an impressive 50 pounds in just 16 weeks [35].

Improvements in Mood and Energy Levels

Many users report significant improvements in mood and energy levels while taking 5-HTP. One individual shared that taking 400 mg of 5-HTP nightly eliminated anxiety and depression, making the world appear beautiful instead of stressful [34].

Mike, who had been in a deep depression, found that 5-HTP helped him enormously after trying unsuccessful with antidepressants. He took 100 mg daily for a couple of years before realizing he no longer needed it. He emphasized the importance of tapering when starting and stopping 5-HTP to avoid adverse effects [34].

Challenges and How to Overcome Them

While many users report positive experiences with 5-HTP, some face challenges or side effects. Nat experienced abdominal cramps and stomach rumbles when taking 5-HTP without food. More concerningly, they developed hematuria (blood in urine) after three days of use, which recurred upon retrying the supplement a month later [34].

To minimize side effects, it is crucial to start with a low dose and gradually increase as needed. Stephon reported taking two capsules nightly for the first two weeks, then switching to every other night. They experienced minor stomach discomfort initially but found that taking 5-HTP after a full dinner resolved the issue [34].

It is also essential to be aware of potential interactions with medications and consult a healthcare professional before starting 5-HTP, especially if you have pre-existing health conditions or are taking other supplements or medications [38] [40] [41] [42].

Positive Experiences


Weight loss

Gastrointestinal discomfort

Improved mood


Increased energy levels

Potential interactions with medications

Reduced cravings

Importance of gradual dosing

In conclusion, while user experiences with 5-HTP for weight loss vary, many report positive outcomes such as successful weight loss, improved mood, and increased energy levels. However, it is essential to be aware of potential challenges and side effects, start with a low dose, and consult a healthcare professional to ensure safe and effective use.


The potential of 5-HTP as a natural weight loss aid has garnered significant attention in recent years. By exploring the scientific research, practical applications, and user experiences surrounding 5-HTP, this article has provided a comprehensive overview of its efficacy and safety in promoting weight management. While the results are promising, it is essential to approach 5-HTP supplementation with caution and under the guidance of a healthcare professional.

Ultimately, the key to sustainable weight loss lies in adopting a holistic approach that combines a balanced diet, regular exercise, and healthy lifestyle habits. 5-HTP may serve as a valuable tool in this journey, helping to regulate appetite, improve mood, and support overall well-being. As with any supplement, individual experiences may vary, and it is crucial to listen to your body and consult with a healthcare provider to determine if 5-HTP is the right choice for your unique needs and goals.


1. Can taking 5-HTP help with weight loss?
Yes, taking 5-HTP might help with weight loss. Studies suggest that 5-HTP can increase feelings of fullness after eating, leading to reduced food intake. In one study, participants who took 5-HTP without dieting lost about 2% of their body weight, and an additional 3% during a dieting period.

2. What are the effects of daily consumption of 5-HTP?
Taking 5-HTP daily in doses up to 400 mg is possibly safe for up to one year. Common side effects include heartburn, stomach pain, nausea, vomiting, diarrhea, drowsiness, sexual dysfunction, and muscle issues. However, high doses, such as 6-10 grams daily, may be unsafe.

3. Does 5-HTP affect dopamine levels?
Yes, 5-HTP may increase serotonin levels while potentially depleting other neurotransmitters like dopamine and norepinephrine. This reduction in neurotransmitters could exacerbate certain medical conditions.

4. Is the effectiveness of 5-HTP supported by scientific research?
Research indicates that 5-HTP may be as effective as some antidepressants. For instance, a six-week study comparing 5-HTP and the antidepressant fluvoxamine showed similar effectiveness in treating symptoms. Participants in the study were given 100 mg of 5-HTP or 50 mg of fluvoxamine three times a day.


[1] -
[2] -
[3] -
[4] -
[5] -
[6] -
[7] -
[8] -
[9] -
[10] -
[11] -
[12] -
[13] -
[14] -
[15] -
[16] -
[17] -
[18] -
[19] -
[20] -
[21] -
[22] -
[23] -
[24] -
[25] -
[26] -
[27] -
[28] -
[29] -
[30] -
[31] -
[32] -
[33] -
[34] -
[35] -
[36] -
[37] -
[38] -
[39] -
[40] -
[41] -
[42] -
[43] -
[44] -
[45] -
[46] -
[47] -
[48] -