If you are over 40 and find that managing your weight feels different than it used to, you may be wondering whether certain herbs can help support your metabolism.
Several herbs and plant-derived ingredients have been studied for their potential effects on energy expenditure, body weight, blood glucose, and other aspects of metabolic health. Green tea, ginger, cinnamon, cayenne pepper, and berberine are among the ingredients that have attracted research interest, although they do not all work in the same way.
Some compounds may temporarily influence energy expenditure, while others have been studied for different metabolic outcomes. The evidence varies considerably, and no single herb has been established as a reliable standalone solution for weight management.
This guide explains 10 herbs and plant ingredients researchers have investigated, how you can incorporate selected ingredients into everyday meals, and what to consider before choosing a supplement.
Quick Answer: Which Herbs May Support Metabolism?
Green tea, ginger, cayenne pepper, cinnamon, ginseng, turmeric, caffeine-containing plants, green coffee, yerba mate, and berberine have all been studied for different aspects of metabolic health.
Green tea, caffeine, and capsaicin are particularly relevant to research on thermogenesis and energy expenditure. Ginger has been investigated in clinical trials involving body weight and body composition. Cinnamon, ginseng, turmeric-derived compounds, and berberine have been studied for other metabolic outcomes.
However, evidence for one outcome does not establish a benefit for another. An ingredient that affects a metabolic marker or produces a short-term change in energy expenditure may not produce meaningful long-term weight loss.
For most people, herbs are best considered alongside a balanced eating pattern, regular physical activity, adequate sleep, and other habits that support overall health.
Quick Comparison: 10 Herbs and Plant Ingredients
| Ingredient | What researchers have studied | Everyday use |
|---|---|---|
| Green tea | Catechins, caffeine, energy expenditure, and weight-related outcomes | Brewed tea |
| Ginger | Body weight and body composition | Fresh or dried ginger in meals |
| Cayenne pepper | Capsaicin, thermogenesis, and energy expenditure | Chili peppers in cooking |
| Cinnamon | Glucose regulation and other metabolic markers | Culinary spice |
| Ginseng | Blood glucose and other health outcomes | Food or selected supplement preparations |
| Turmeric | Curcumin and metabolic or inflammatory markers | Culinary spice |
| Coffee and caffeine | Short-term energy expenditure and alertness | Coffee or other caffeinated drinks |
| Green coffee | Chlorogenic acids and weight-related outcomes | Coffee or extracts |
| Yerba mate | Caffeine and other plant compounds | Brewed infusion |
| Berberine | Glucose metabolism and other metabolic outcomes | Concentrated supplements, where appropriate |
The form matters. Evidence from a concentrated extract does not necessarily apply to a cup of tea, a culinary spice, or a finished supplement containing several ingredients.
What Does It Mean to Support Metabolism?
Metabolism describes the processes through which your body uses energy to maintain essential functions, digest food, regulate temperature, and support movement.
The term metabolism booster is often used broadly, but researchers study several distinct outcomes.
Energy expenditure
Energy expenditure refers to the energy your body uses over time. It includes the energy required for basic bodily functions, physical activity, and digestion.
Thermogenesis
Thermogenesis is the production of heat by the body. Certain compounds, including caffeine and capsaicin, have been studied for their potential to temporarily influence energy expenditure.
Fat oxidation
Fat oxidation refers to the use of fat as a fuel source. An increase in fat oxidation during a particular period does not automatically mean that someone will lose more body fat over time.
Glucose metabolism
Glucose metabolism describes how the body processes and regulates glucose. Some ingredients, including cinnamon and berberine, have been investigated for glucose-related outcomes rather than simply for their effects on energy expenditure.
These distinctions matter when evaluating herbal supplements. A product that affects one of these processes should not automatically be described as a proven weight-loss solution.
1. Green Tea
Green tea is one of the most widely studied beverages in research on energy expenditure and weight-related outcomes.
It contains catechins, including epigallocatechin gallate (EGCG), as well as caffeine. Researchers have investigated whether these compounds influence thermogenesis, fat oxidation, and body weight.
Some clinical studies have reported modest changes in weight-related measures with particular green-tea preparations. However, findings vary, and the evidence does not establish a large or consistent weight-loss effect for everyone. The National Institutes of Health Office of Dietary Supplements describes the possible effect of green tea on body weight as modest.
How to include green tea in your routine
Brewed green tea is a straightforward option if you enjoy its flavor. You can drink it hot or cold and incorporate it into your usual beverage routine.
Green tea contains caffeine, so consider your sensitivity and whether drinking it later in the day affects your sleep.
It is also important to distinguish brewed tea from concentrated green-tea extracts. Extracts can deliver much higher amounts of particular compounds and have been associated with liver injury in some cases.
What the evidence means: Green tea is a reasonable beverage to consider, but it should not be expected to produce substantial weight loss on its own.
2. Ginger
Ginger is widely used in cooking and drinks. It contains compounds called gingerols and shogaols that have been investigated for several biological effects.
Research has examined ginger supplementation in relation to body weight, body mass index, waist circumference, and body fat.
A 2024 systematic review and meta-analysis of 27 randomized controlled trials involving 1,309 adults reported changes in several body-composition measures among participants receiving ginger interventions. However, the researchers rated the certainty of evidence as low for body weight and very low for body mass index and waist circumference. More well-designed trials are needed to establish how reliable and meaningful these effects are.
Easy ways to use ginger
Fresh or dried ginger can add flavor to:
- Soups and stews
- Stir-fries
- Smoothies
- Oatmeal
- Warm drinks
- Vegetable dishes
Using ginger in food is different from taking a concentrated supplement. Ginger supplements may cause heartburn, abdominal discomfort, or other digestive symptoms, and interactions with medicines are possible.
What the evidence means: Ginger is a versatile culinary ingredient with promising but uncertain research on body-composition outcomes. It should not be presented as a guaranteed weight-loss aid.
3. Cayenne Pepper and Capsaicin
Capsaicin is the compound responsible for the heat of cayenne and many chili peppers.
Researchers have studied capsaicin for its potential effects on thermogenesis, energy expenditure, and fat oxidation. Some findings suggest that capsaicin-containing ingredients may modestly affect these processes, but the practical significance varies.
Eating spicy food does not guarantee meaningful weight loss, and there is no need to consume chili peppers if you do not enjoy them.
How to use cayenne pepper
If you tolerate spicy foods, try adding cayenne or chili peppers to:
- Soups and stews
- Beans and lentils
- Eggs and vegetables
- Roasted vegetables
- Homemade sauces
Start with an amount that suits your taste. Spicy foods can aggravate digestive discomfort in some people.
What the evidence means: Capsaicin is relevant to research on thermogenesis, but its presence in a food or supplement does not establish that the product will produce substantial weight loss.
4. Cinnamon
Cinnamon is a familiar culinary spice that has also been investigated for glucose regulation and other metabolic outcomes.
It is often marketed as an ingredient that boosts metabolism, but research does not clearly establish cinnamon as a reliable weight-loss aid. Studies have used different cinnamon species, preparations, and amounts, which makes their results difficult to compare.
How to use cinnamon
Cinnamon can add flavor to:
- Oatmeal
- Plain yogurt
- Chia pudding
- Coffee
- Smoothies
- Baked apples
It can make foods taste sweeter without requiring additional sugar, depending on the recipe.
Ceylon cinnamon versus cassia cinnamon
Ceylon cinnamon and cassia cinnamon have different chemical compositions. Cassia cinnamon can contain higher amounts of coumarin, a compound that may be harmful to the liver in excessive amounts over time.
People who consume cinnamon frequently or are considering concentrated cinnamon supplements should consider the type of cinnamon and the amount used, particularly if they have liver concerns.
What the evidence means: Cinnamon is a useful culinary spice and a subject of metabolic research, but it should not be treated as a proven fat-burning ingredient.
5. Ginseng
Ginseng has a long history of traditional use and has been studied for possible effects on blood glucose, fatigue, and other health outcomes.
The term ginseng can refer to different species and preparations. Asian ginseng and American ginseng are not interchangeable in every research context, so the specific plant and preparation matter.
Although researchers have investigated potential metabolic effects, the evidence does not establish ginseng as a reliable way to substantially increase metabolism or produce weight loss.
What to consider before using ginseng
Check the product label for the exact species, ingredient amount, and other components in the formula.
Asian ginseng may cause insomnia and can interact with certain medicines. It may also affect blood glucose and may be unsuitable for some people, including those who are pregnant or breastfeeding.
What the evidence means: Ginseng remains an area of research interest, but claims about weight loss or metabolism should be evaluated against evidence for the specific preparation and outcome.
6. Turmeric and Curcumin
Turmeric is a common cooking spice. Curcumin is one of its best-known compounds and has been investigated for possible effects on inflammation-related processes and metabolic markers.
Some research has explored concentrated curcumin preparations in relation to body composition and other health measures. However, findings vary, and results from supplements cannot automatically be applied to turmeric used in everyday cooking.
How to use turmeric
Turmeric can be included in:
- Curries
- Soups
- Lentil dishes
- Rice and grain dishes
- Roasted vegetables
- Egg dishes
These are practical culinary uses rather than established weight-management treatments.
Concentrated curcumin products can differ substantially from culinary turmeric. Some formulations designed to increase absorption have been associated with liver injury, and supplements may cause digestive side effects or interact with medicines.
What the evidence means: Turmeric can contribute flavor and variety to meals. Claims about curcumin supplements should be assessed against evidence for the specific formulation and outcome.
7. Coffee and Other Caffeine-Containing Plants
Caffeine occurs naturally in coffee, green tea, yerba mate, and other plants. It has established stimulant effects and has been studied for short-term changes in energy expenditure.
Caffeine can temporarily increase thermogenesis, but the response depends on the amount consumed, individual sensitivity, and habitual intake. Tolerance can develop with regular use.
More caffeine is not automatically better. Excessive intake can contribute to nervousness, anxiety, digestive discomfort, palpitations, or disrupted sleep.
How to use caffeine thoughtfully
Consider your total intake from coffee, tea, energy drinks, and supplements. If caffeine affects your sleep, reducing your intake or avoiding it later in the day may help.
Be particularly careful with multi-ingredient supplements that combine several stimulant sources. A label may list botanical ingredients without making their total caffeine contribution obvious.
What the evidence means: Caffeine has documented short-term effects on energy expenditure, but this does not make high-caffeine supplements a dependable long-term weight-management strategy.
8. Green Coffee
Green coffee refers to coffee beans that have not been roasted. It contains caffeine and chlorogenic acids, which have been investigated for possible effects on glucose metabolism and weight-related outcomes.
Research on green coffee extracts has varied in study quality, formulation, and findings. The available evidence does not justify assuming that green coffee supplements reliably produce meaningful weight loss.
What to check when evaluating green coffee products
Look for clear information about:
- The amount of extract per serving
- The caffeine content
- The other ingredients in the formula
- The evidence supporting the product's claims
- Relevant safety information
Consider green coffee's caffeine contribution alongside coffee, tea, and other supplements you may consume.
What the evidence means: Green coffee is a research topic, not a guarantee of weight loss. Product-specific evidence and safety information matter more than broad claims about chlorogenic acids.
9. Yerba Mate
Yerba mate is a traditional South American infusion prepared from the leaves of Ilex paraguariensis. It contains caffeine and other plant compounds that have been studied for various biological effects.
Research has explored possible metabolic effects, but evidence establishing a meaningful weight-management benefit from drinking yerba mate remains limited. Findings from concentrated extracts or multi-ingredient products should not automatically be applied to an ordinary cup of the beverage.
How to approach yerba mate
If you enjoy yerba mate, consider it a caffeinated drink and account for your overall caffeine intake. Caffeine may affect sleep or cause unwanted symptoms in sensitive individuals.
Avoid consuming beverages at scalding temperatures.
What the evidence means: Yerba mate can be an alternative to other caffeinated beverages, but it should not be relied on as a proven metabolism booster.
10. Berberine
Berberine is a plant-derived compound found in plants such as barberry and goldenseal. It has been investigated particularly for glucose metabolism and other metabolic outcomes.
Berberine is often marketed as a natural weight-loss aid. Some studies have reported changes in body-weight measures, but the evidence remains inconclusive. Studies have used different formulations and amounts, and their results are not always easy to generalize.
Berberine and metabolic health
Berberine is not simply another thermogenic ingredient. Research has examined glucose-related outcomes and other aspects of metabolic health.
This distinction matters when comparing berberine with caffeine-containing products or ingredients studied for short-term energy expenditure.
Safety considerations
Berberine can cause gastrointestinal side effects and interact with medicines. It should not be used during pregnancy or breastfeeding and should not be given to infants.
Anyone taking medication or managing a health condition should discuss berberine with a qualified healthcare professional before considering a supplement.
What the evidence means: Berberine has attracted interest for metabolic health, but its potential benefits and limitations should be evaluated separately from those of thermogenic ingredients.
Which Herbs Have the Most Relevant Evidence?
There is no single answer because the ingredients above have been studied for different outcomes.
For thermogenesis and energy expenditure
Green tea compounds, caffeine, and capsaicin have been investigated for potential effects on energy expenditure or fat oxidation. Any effects need to be considered in context, and a short-term change in energy expenditure does not establish a substantial long-term weight-management benefit.
For body-weight outcomes
Green-tea preparations and ginger supplements have been examined in clinical trials, but results vary. Study quality, formulation, duration, and participant characteristics influence how confidently the findings can be applied.
For glucose-related outcomes
Cinnamon, ginseng, turmeric-derived compounds, and berberine have been studied for selected metabolic measures. The evidence differs by ingredient, and none should be treated as a substitute for prescribed treatment.
For everyday food choices
Ginger, cinnamon, turmeric, and chili peppers can add flavor and variety to meals. Their value as culinary ingredients does not depend on proving a weight-loss effect.
The key is to distinguish evidence for an ingredient's specific effect from the broader claims sometimes made about metabolism supplements.
What Influences Metabolism After 40?
Metabolism is affected by several factors, including body composition, age, physical activity, sleep, nutrition, and individual biology.
During midlife, changes in muscle mass, daily routines, sleep, and hormonal status can influence energy needs and weight management. However, these changes vary between individuals and should not be attributed to one hormone or one ingredient alone.
A broader approach to metabolic health includes:
- Eating a varied diet with adequate nutrients.
- Including protein- and fiber-rich foods according to individual needs.
- Maintaining regular physical activity.
- Supporting muscle strength and function.
- Getting sufficient, consistent sleep.
- Reviewing persistent or unexplained changes in health with a qualified healthcare professional.
Herbs and plant-derived ingredients can be considered within this wider context, but they do not replace the foundations of health or guarantee a particular outcome.
How to Choose an Herb or Metabolism Supplement
If you are considering an herbal product, evaluate the formula rather than relying on the product's headline claims.
1. Identify the intended outcome
Is the product marketed for energy expenditure, glucose-related outcomes, appetite, or general wellness? These are different goals and require different evidence.
2. Check the ingredient form
Brewed tea, culinary spices, standardized extracts, and multi-ingredient supplements can have very different compositions. Research on one form may not apply to another.
3. Look for transparent amounts
A clear label should identify the ingredients and provide amounts where applicable. Proprietary blends that conceal individual amounts make it more difficult to evaluate the formula.
4. Review the supporting evidence
Look for human studies relevant to the specific ingredient, formulation, and intended outcome. Evidence from laboratory research alone does not establish a benefit in people.
5. Consider safety and interactions
Concentrated extracts can have different risks from ordinary food use. Review potential interactions, stimulant content, and relevant precautions. Consult a qualified healthcare professional if you take medication or have an existing health condition.
6. Evaluate the claims realistically
Be cautious of products promising rapid results, guaranteed weight loss, or the ability to target fat in a particular area. A long ingredient list is not proof of effectiveness.
A well-informed choice begins with the formula, the available evidence, and its suitability for the individual—not the strength of the marketing language.
What to Look for in a Metabolism Support Supplement
If you are considering a supplement to complement your metabolic-health routine, start with the formula itself. Understanding its ingredients is more useful than judging a product by the number of compounds listed on its label.
Look for a clearly disclosed ingredient list, stated amounts where available, and evidence relevant to the product's intended purpose. Check whether the supporting research concerns the same ingredient form and dosage used in the formula.
It is also worth considering product quality, cost per serving, caffeine content, and any relevant precautions. Concentrated extracts can differ considerably from the teas and spices you use in everyday cooking.
A supplement may be worth investigating when its formulation, evidence, and safety information align with your goals. Your decision should be based on those details rather than on a promise of rapid weight loss.
Explore the formula and its ingredients to understand what it contains, how it is intended to be used, and what information is available to help you make an informed decision.
A Practical Way to Include Herbs in Everyday Meals
You do not need to use all ten ingredients or follow a complicated supplement routine.
Consider simple food-based options that fit your preferences:
- Brew green tea if you enjoy it and tolerate caffeine.
- Add ginger to soups, vegetables, or warm drinks.
- Use cinnamon to flavor oatmeal or yogurt.
- Add turmeric to curries, lentils, or roasted vegetables.
- Use chili peppers in meals if you enjoy spicy food.
These ideas are ways to incorporate familiar ingredients into a varied diet, not a prescribed weight-loss plan.
If you are interested in a concentrated extract or supplement, evaluate it separately from ordinary culinary use. More ingredients or higher concentrations do not necessarily mean greater benefits.
Frequently Asked Questions
What herbs are commonly studied for metabolism support?
Green tea, ginger, capsaicin-containing chili peppers, cinnamon, ginseng, turmeric-derived compounds, and berberine have all been studied for different aspects of metabolic health. The amount and quality of evidence vary, and no single ingredient has been established as a universal metabolism booster.
Does green tea increase metabolism?
Green tea contains catechins and caffeine that have been studied for possible effects on energy expenditure and body-weight outcomes. Any effects appear modest or variable, and brewed tea should not be expected to produce substantial weight loss on its own.
Can ginger support metabolic health?
Ginger has been investigated in clinical trials involving body weight and selected metabolic measures. Some findings are promising, but the certainty of evidence varies, and more research is needed to establish the size and practical significance of any benefits.
Is cinnamon a proven fat-burning ingredient?
No. Cinnamon has been studied for glucose regulation and other metabolic outcomes, but evidence does not clearly establish it as a weight-loss aid. Culinary use and concentrated supplementation should also be distinguished.
What is the difference between thermogenesis and fat oxidation?
Thermogenesis is the production of heat by the body. Fat oxidation is the use of fat as a fuel source. They are related to energy metabolism but are not the same process, and a change in either measure does not automatically establish a meaningful change in long-term body weight.
Is berberine a metabolism booster?
Berberine is studied primarily for glucose metabolism and other metabolic outcomes, rather than simply as a thermogenic ingredient. Some studies report changes in body-weight measures, but the evidence remains inconclusive. It can interact with medicines and is unsuitable in some circumstances.
Are herbal metabolism supplements safe?
Safety depends on the ingredient, amount, preparation, other ingredients, and individual circumstances. Concentrated extracts can have different risks from foods and beverages, and some supplements interact with medicines. Check the label and consult a qualified healthcare professional when appropriate.
Should I combine several herbs for better results?
Combining multiple supplements does not guarantee greater benefit and can increase the complexity of evaluating side effects and interactions. Review each ingredient separately and seek professional advice before combining concentrated products.
The Bottom Line
Herbs and plant-derived ingredients offer several areas of research into metabolism and metabolic health, but they should not all be described as metabolism boosters.
Green tea, caffeine, and capsaicin have been studied for effects on energy expenditure or thermogenesis. Ginger has been investigated for body-weight and other metabolic measures, while cinnamon, ginseng, turmeric-derived compounds, and berberine have been explored for other outcomes.
The most useful approach is to match the ingredient to the specific outcome being studied, distinguish foods from concentrated extracts, and assess the quality of the evidence before considering a supplement.
For adults over 40, herbs are best considered within the broader context of nutrition, physical activity, sleep, and overall health. No single ingredient can replace that wider approach.
References and Further Reading
- NIH Office of Dietary Supplements: Dietary Supplements for Weight Loss
- National Center for Complementary and Integrative Health: Cinnamon
- National Center for Complementary and Integrative Health: Berberine and Weight Loss
- National Center for Complementary and Integrative Health: Turmeric
- Ginger Intervention on Body Weight and Body Composition in Adults: Systematic Review and Meta-analysis
- National Center for Complementary and Integrative Health: Asian Ginseng
- National Center for Complementary and Integrative Health: Ginger
Health information disclaimer: This article is for educational purposes and is not a substitute for individualized medical advice. Herbal supplements can interact with medicines and may not be appropriate for everyone. Consult a qualified healthcare professional before using concentrated supplements, particularly if you have a health condition or take medication.