Tomato powder beats isolated lycopene in study, but expert questions scope of conclusions

By Hank Schultz contact

- Last updated on GMT

©Getty Images - Tim UR
©Getty Images - Tim UR

Related tags: Lycopene, Tomato, Antioxidant activity, Antioxidant capacity

A recent study has found that whole tomato powder does better than the extracted carotenoid lycopene in quelling post exercise inflammation. But an expert cautions that the study’s small scale makes drawing large conclusions difficult.

The study drives at the heart of one of the debates in the natural products industry, that being, is a pharmaceutical reductionist approach the correct one? Or are health promoting fractions of foods and herbs best offered in their ‘whole food’ matrices?

Support for ‘entourage’ effects

Some information points to the entourage effect of natural matrices.  In the case of guayusa, the caffeine in this Amazonian rainforest botanical seems to perform differently than does caffeine by itself.  The botanical is reputed to boost concentration and focus without causing the jitters some consumers report with caffeine use.  The speculation on the part of at least one supplier is that it is the addition of the other constituents of this complex botanical that accounts for these effects​.

So what about the constituents in a tomato?  Hasn’t this foodstuff been researched to death and all of these questions already put to bed?

Perhaps not.  The recent paper looked into whether lycopene in the presence of other tomato constituents performed differently than does lycopene by itself.

Lycopene is a red carotenoid found in tomatoes, watermelons, pink grapefruit and other foodstuffs.  A review published in 2017​ associates lycopene with cardiovascular health benefits such as LDL cholesterol improvements and blood pressure regulation.

Study: Tomato powder beats lycopene

The present study, published in the Journal of the International Society of Sports Nutrition​, looked specifically at lycopene’s antioxidant property.  As study materials the researchers used a tomato power that provided 30 mg lycopene, 5.38 mg beta-carotene, 22.32 mg phytoene, 9.84 mg phytofluene, 30 mg of lycopene by itself via a commercially available supplement or a placebo. 

 The researchers recruited 11 trained male athletes for the randomized, crossover study.  Each athlete took one of the study materials for a week prior to an exhaustive exercise trial.  Blood was drawn pre- and post-exercise to measure total anti-oxidant capacity (TAC) and variables of lipid peroxidation including malondialdehyde (MDA) and 8-isoprostane.

The researchers found evidence of a distinct entourage effect for the tomato powder material.  “Beneficial effects of tomato powder on antioxidant capacity and exercise-induced lipid peroxidation may be brought about by a synergistic interaction of lycopene with other bioactive nutrients rather than single lycopene,” ​they concluded.

Does that mean standalone lycopene products are trading on false promises?  Would consumers seeking these benefits be better off just eating more pasta sauce?

Study’s small size colors results

Not so fast, said Stefan Gafner, PhD, chief science officer of the American Botanical Council. Gafner said the study’s small size makes it difficult to draw big conclusions from it.

“Having more clinical data on the health benefits of botanical ingredients is always welcome. However, in this case, the meaningfulness of the study is limited. First, there were only 11 athletes involved in the study, and while this was a randomized, placebo-controlled, double-blind crossover study, meaning that each participant received the tomato supplement, the lycopene supplement, and the placebo with a 2 week washout period in between treatments, this is still a very small clinical study,”​ he said.

Gafner also said the title of the research may be somewhat overstated.

“Based on the small participant size, it may not surprise that the differences in the antioxidant status, and the reduction of markers of oxidative stress (malondialdehyde) and lipid peroxidation (8-isoprostane) between tomato supplement and lycopene were not statistically significant, despite the authors contention in the title that ‘Tomato powder is more effective than lycopene to alleviate exercise-induced lipid peroxidation.’ There was, however, a significant difference between tomato powder and placebo with regard to all the biomarkers,” ​he added.

There was a trend towards a higher effect of tomato powder compared to lycopene, but the difference was marginal and needs to be confirmed in much larger studies,” ​Gafner concluded.

Source:Journal of the International Society of Sports Nutrition
18​, Article number: 17 (2021)
Tomato powder is more effective than lycopene to alleviate exercise-induced lipid peroxidation in well-trained male athletes: randomized, double-blinded cross-over study
Authors: Gholami F, et al.

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