Natural Standard Monograph, Copyright © 2014 (www.naturalstandard.com). Commercial distribution prohibited. This monograph is intended for informational purposes only, and should not be interpreted as specific medical advice. You should consult with a qualified health care professional before making decisions about therapies and/or health conditions.
Uses based on scientific evidence
These uses have been tested in humans or animals. Safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare professional.
Although lycopene is believed to have antioxidant benefits, research has found mixed results in this area. Research has looked at lycopene levels in the body or focused on tomatoes or tomato-based products, rather than on lycopene supplements. Limited studies on lycopene supplements with other ingredients suggest antioxidant benefits. More information is needed on the potential effects of lycopene alone.
Research suggests that lycopene may have antioxidant benefits. These effects are believed to help prevent asthma caused by exercise, although the method is still unclear. Early studies also report that tomato-rich diets may benefit people with asthma. However, available research has used products and supplements with mixed ingredients. More research is needed to better understand the potential effect of lycopene alone.
Although not well studied in humans, early research suggests that lycopene may act as a blood thinner. Most available research in humans has been limited to the use of tomato extract. More research is needed to determine the effects of lycopene alone.
There is limited research on the use of lycopene together with chemotherapy for brain tumors. Early research suggests that this combination lacks benefit over chemotherapy alone. More information is needed on the use of lycopene in people with brain tumors.
Breast cancer prevention
Lycopene and lycopene-rich foods have been studied as a potential therapy for breast cancer. Early studies on breast cancer have looked for a possible link between disease risk and fruit or vegetable intake, tomato consumption, or lycopene levels, with mixed results. Studies on lycopene supplementation for breast cancer prevention are lacking. More research is needed in this area.
Cancer prevention (general)
Some studies suggest that fruit and vegetable-rich diets may be linked to reduced cancer risk. Although it has not been well studied in humans, early research suggests that lycopene may help prevent a number of different cancers, including bladder cancer and skin cancer. However, the reason behind this potential benefit remains unclear. Studies have also looked at the potential role of tomatoes, tomato-based products, and lycopene levels. However, studies of lycopene supplements are lacking. More research is needed in this area to draw conclusions.
Cardiovascular disease risk (heart disease risk)
Early research has found mixed results for tomato products in reducing the risk of heart disease. More high-quality research is needed before firm conclusions can be made.
Cervical cancer prevention
Research has looked at the possible use of lycopene in preventing cervical cancer. Some studies on tomato intake, lycopene levels, and disease risk suggest benefit with lycopene intake. However, others have found conflicting results. More research is needed before conclusions can be made.
Limited research suggests that higher lycopene levels may decrease the risk of plaque build-up in the arteries. These benefits are thought to be due to lycopene's antioxidant effects. However, results from other studies have been conflicting, and most studies used a mixture of ingredients. More information is needed on the potential effects of lycopene alone for this condition.
Diabetes (type 2)
Early research has reported a lack of benefit of lycopene or lycopene-containing foods on type 2 diabetes. More high-quality research is needed in this area.
Lycopene has been studied for the prevention of prostate cancer, with mixed results. Early research suggests that lycopene may slow prostate enlargement in people with benign prostatic hypertrophy (BPH). However, more high-quality studies are needed in this area.
Lycopene has been suggested to be beneficial for some eye disorders. These include age-related macular degeneration (AMD), which is a breakdown of the retina that may lead to vision loss and cataracts, or clouding of the lens, in the eye. Although some studies suggest that there may be a link between higher lycopene levels and reduced risk of cataracts or AMD, largely the results have been conflicting. More evidence is needed before further conclusions can be made.
Early evidence reports that a preparation containing lycopene and other nutrients found in whole tomatoes may help reduce gum disease, bleeding, and plaque. More research is needed to support these findings, especially on the effects of lycopene alone.
Early research suggests that lycopene in combination with other treatments may affect heart failure symptoms. Additional research of lycopene alone is needed to draw conclusions.
Limited research has shown unclear benefit in using lycopene in addition to standard treatment for H. pylori infection. Additional research is needed before a conclusion may be made.
High blood pressure
Lycopene has been studied for its potential protective effects on the heart. However, the results are mixed. While some studies report that lycopene may help lower blood pressure, others suggest a lack of benefit or association between lycopene levels and high blood pressure risk. Most of the therapies studied have contained mixed ingredients. More information is needed on the possible effects of lycopene alone.
High blood pressure associated with pregnancy
Early research has found inconsistent results for using lycopene to prevent high blood pressure in pregnancy. There were also instances of fetal growth problems in women having their first child after lycopene supplementation. Additionally, most studies looked at mixed-ingredient supplements. High-quality research on lycopene alone is needed.
It has been suggested that oxidative damage may negatively affect sperm. Lycopene is believed to have antioxidant benefits and has been studied for use in infertility. Although a link between lycopene levels and semen quality has been suggested, studies have found conflicting results. More research is needed in this area.
Early research suggests that lycopene from a mixed ingredient supplement or from fresh tomatoes may lack anti-inflammatory benefits. Results have been inconsistent between studies, many of which have looked at mixed-ingredient therapies. More information is needed on the possible effects of lycopene alone.
High-quality studies on the use of lycopene supplementation for kidney disorders or kidney cancer are lacking. Early research suggests that lycopene lacks benefit in kidney cancer. More research is needed to confirm these results.
Lipid lowering effects
Available research suggests that doses of more than 25 milligrams of lycopene daily may lower levels of low-density lipoprotein (LDL, or "bad") cholesterol and total cholesterol. Although this is promising, more high-quality research is needed in this area.
Lung cancer prevention
Research suggests that increased lycopene intake may reduce the risk of lung cancer. However, there are also studies suggesting that lycopene lacks benefit for lung cancer. Due to the lack of consistency among studies, a conclusion is unable to be made at this time.
Early studies in healthy women suggest that combination lycopene supplementation may reduce some menopausal symptoms. Although this is promising, the effects of lycopene alone are still unknown. More high-quality research is needed in this area.
Studies have found benefits of mixed-ingredient lycopene supplementation on mouth sores. However, evidence is limited, and more information is needed on the potential effects of lycopene alone.
Mouth and throat inflammation
Research on lycopene alone and in combination with steroid injections suggests benefits for mouth inflammation. More studies on the effects of lycopene alone are needed.
Ovarian cancer prevention
Some research suggests that the risk of ovarian cancer may decrease with intake of some antioxidants. However, the benefit of lycopene supplementation is unclear. Research has shown conflicting results of lycopene intake on ovarian cancer risk. More research is needed before conclusions can be made.
Early research reports that dietary lycopene intake from tomatoes may be linked to a lower risk of pancreatic cancer. Although this is promising, more studies are needed in this area.
Most studies looking at the effects of lycopene on prostate cancer have focused on tomato consumption and have found mixed results. While some research suggests that increased lycopene intake reduces prostate cancer risk, others reported conflicting findings. More information is needed before conclusions can be made.
Early research has shown benefits of using lycopene together with saw palmetto and selenium in treating prostate inflammation. Although this is promising, the effects of lycopene alone remain unclear. More high-quality research is needed.
The use of lycopene together with other nutrients such as beta-carotene, vitamin C, and vitamin E has been suggested to protect the skin from sun damage. Lycopene-rich tomato paste has also been used for sun protection. Early research suggests benefits, but more research is needed before a firm conclusion may be made.
Upper gastrointestinal tract & colorectal cancer prevention
There is inconclusive evidence for lycopene use in preventing cancers of the digestive tract. Limited research reports that cancer risk may decrease with high tomato intake. However, other studies have found either a lack of evidence or conflicting results for stomach and colon cancer. More information is needed to assess the effects of lycopene on these conditions.
Limited research found a lack of benefit of lycopene consumption on immune system function. Although information is limited, there is enough evidence to conclude a lack of effectiveness.
Lung function after exercise
Exercise may lead to asthma or related lung conditions. Lycopene, which is considered to be an antioxidant, has been studied for its effects on lung function after exercise. Early evidence reported a lack of benefit of lycopene supplementation on lung function. More research is needed to confirm these findings.
*Key to grades:
A: Strong scientific evidence for this use;B: Good scientific evidence for this use; C: Unclear scientific evidence for this use;D: Fair scientific evidence against this use (it may not work);F: Strong scientific evidence against this use (it likely does not work).
For full grading rationale, click here.
Uses based on tradition or theory
The below uses are based on tradition or scientific theories. They often have not been thoroughly tested in humans, and safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified health care professional
Aggressive behavior, AIDS, arsenic poisoning, bone loss, cognitive function, coronary death prevention (death from coronary artery disease), diabetes mellitus type 1, heart attack prevention, human papillomavirus (HPV), hyperlipoproteinemia (high levels of lipoprotein and cholesterol in the blood), lung function, mesothelioma (cancer of the tissue that lines organs), pancreatitis (pancreas inflammation), Parkinson's disease, premature birth prevention, radiation protection, respiratory infections, rheumatoid arthritis, stroke prevention, urinary tract cancer.
The U.S. Food and Drug Administration does not strictly regulate herbs and supplements. There is no guarantee of strength, purity or safety of products, and effects may vary. You should always read product labels. If you have a medical condition, or are taking other drugs, herbs, or supplements, you should speak with a qualified healthcare professional before starting a new therapy. Consult a healthcare professional immediately if you experience side effects.
Most herbs and supplements have not been thoroughly tested for interactions with other herbs, supplements, drugs, or foods. The interactions listed below are based on reports in scientific publications, laboratory experiments, or traditional use. You should always read product labels. If you have a medical condition, or are taking other drugs, herbs, or supplements, you should speak with a qualified healthcare professional before starting a new therapy.
Natural Standard developed the above evidence-based information based on a systematic review of the available scientific articles. For comprehensive information about alternative and complementary therapies on the professional level, go to www.naturalstandard.com. Selected references are listed below.
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