The science

What we know, what we don't, and how we tell them apart.

Desert truffle is a promising ingredient with a long history of use and a growing body of laboratory research. It is not a proven treatment for macular degeneration, and this page will not pretend otherwise. Here is every claim we make, with its evidence level attached.

Five pathways studied in the retina

Compounds identified in Terfezia desert truffle — and where researchers have examined them
Clinical = studied in human trials. Laboratory = cell-culture or ex-vivo research on truffle extracts, not on this product.
*These statements have not been evaluated by the Food and Drug Administration.

The AREDS trials, stated accurately

Supplement marketing routinely blurs these two trials together. They are different studies, run in different decades, with different results — and the difference matters if you are deciding what to take.
AREDS AREDS2
Ran

1992–2001

2006–2012
Published

2001

2013
Participants

3,640

4,203
Key finding

Antioxidants plus zinc reduced the risk of progression to advanced AMD by about 25% at five years in participants at high risk

Adding lutein and zeaxanthin produced no statistically significant reduction overall; a ~25% reduction appeared only in the subgroup with the lowest dietary lutein and zeaxanthin intake
Macular carotenoids

Not included

Lutein 10 mg and zeaxanthin 2 mg added
TruVista Desert Truffle Plus AREDS2 contains the AREDS2 nutrient set at the doses used in that trial.

The five pathways, one at a time

Clinical evidence

1. Macular carotenoids

Lutein and zeaxanthin are concentrated in the macula, where they absorb short-wavelength light and act as antioxidants. Both were studied in AREDS2 and both are in this formula at the trial doses. Desert truffle additionally contains lycopene and anthocyanins.

Correction: an earlier version of this site said macular pigment filters "up to 90%" of blue light. We could not substantiate that figure and have removed it. Published estimates of macular pigment blue-light attenuation are considerably lower.

Laboratory evidence

2. Ergothioneine

Ergothioneine is an unusually stable antioxidant found almost exclusively in fungi. The body has a dedicated transporter for it (OCTN1) and concentrates it in several tissues including the eye — which suggests it has a role there, though what that role is remains under study.

There is no human trial showing that supplemental ergothioneine benefits macular health.

Laboratory evidence

3. Anti-inflammatory activity

In cultured mouse macrophages stimulated with LPS and interferon-gamma, Terfezia extracts reduced markers of inflammation. In that study T. boudieri reduced nitric oxide, iNOS, COX-2, TNF-α and IL-6; T. claveryi — the species in this product — showed comparable effects except that no significant effect on IL-6 or COX-2 was seen at protein level.

We state the species-specific result because it is what the paper actually reports. This is cell-culture work, not a study in people.

Laboratory evidence

4. Retinal pigment epithelium support

The retinal pigment epithelium is the cell layer beneath the photoreceptors that clears waste and recycles visual pigments. Naringenin, a flavonoid present in desert truffle, has been examined in retinal cell models under oxidative stress.

Cell-model research. No human outcome data.

Laboratory evidence

5. Anti-angiogenic signal

In an ex-vivo aortic ring assay, hexane and ethyl acetate extracts of Terfezia claveryi inhibited microvessel sprouting by 100% and 81.2% respectively at 100 µg/mL. Separately, T. boudieri extracts have shown suppression of VEGF expression.

These are isolated-tissue and cell studies. No clinical trial data in humans.

References

Every citation below has been checked against PubMed. Where the previous version of this site cited a PMID that resolved to a different paper, it has been corrected or removed.

  1. Dahham SS, Al-Rawi SS, Ibrahim AH, Abdul Majid AS, Abdul Majid AMS. Antioxidant, anticancer, apoptosis properties and chemical composition of black truffle. Saudi J Biol Sci. 2018;25(8):1524–1534. doi:10.1016/j.sjbs.2016.01.031 · PMID 30591773

  2. Dawood AS, Sedeek MS, Farag MA, Abdelnaser A. Terfezia boudieri and Terfezia claveryi inhibit the LPS/IFN-γ-mediated inflammation in RAW 264.7 macrophages through an Nrf2-independent mechanism. Sci Rep. 2023;13(1):10106. doi:10.1038/s41598-023-35612-8 · PMID 37344506

  3. Al Obaydi MF, Hamed WM, Al Kury LT, Talib WH. Terfezia boudieri: a desert truffle with anticancer and immunomodulatory activities. Front Nutr. 2020;7:38. doi:10.3389/fnut.2020.00038 · PMID 32322585

  4. Tejedor-Calvo E, Amara K, Reis FS, et al. Chemical composition and evaluation of antioxidant, antimicrobial and antiproliferative activities of Tuber and Terfezia truffles. Food Res Int. 2021;140:110071. doi:10.1016/j.foodres.2020.110071 · PMID 33648293

  5. Baldelli S, Aiello G, De Bruno A, et al. Bioactive compounds and antioxidant potential of truffles: a comprehensive review. Antioxidants (Basel). 2025;14(11):1341. doi:10.3390/antiox14111341 · PMID 41300498

  6. Lee H, Nam K, Zahra Z, Farooqi MQU. Potentials of truffles in nutritional and medicinal applications: a review. Fungal Biol Biotechnol. 2020;7:9. doi:10.1186/s40694-020-00097-x · PMID 32566240

  7. Bryl A, Falkowski M, Zorena K, Mrugacz M. The role of resveratrol in eye diseases — a review of the literature. Nutrients. 2022;14(14):2974. doi:10.3390/nu14142974 · PMID 35889930

  8. Cheah IK, Halliwell B. Ergothioneine, recent developments. Redox Biol. 2021;42:101868. doi:10.1016/j.redox.2021.101868