The DOI matches its Crossref record; 8 of the 8 references it cites were found in a registry or an index.
Astaxanthin: How much is too much? A safety review
Abstract
Astaxanthin (AX)‐containing preparations are increasingly popular as health food supplements. Evaluating the maximum safe daily intake of AX is important when setting dose levels for these products and currently, there are discrepancies in recommendations by different regulatory authorities. We have therefore conducted a review of approved dose levels, clinical trials of natural AX, and toxicological studies with natural and synthetic AX. Recommended or approved doses varied in different countries and ranged between 2 and 24 mg. We reviewed 87 human studies, none of which found safety concerns with natural AX supplementation, 35 with doses ≥12 mg/day. An acceptable daily intake (ADI) of 2 mg as recently proposed by European Food Safety Authority was based on a toxicological study in rats using synthetic AX. However, synthetically produced AX is chemically different from natural AX, so results with synthetic AX should not be used in assessing natural AX safety. In addition, few safety studies have been conducted in either humans or animals with synthetic AX. We therefore recommend the ADI for natural AX to be based only on studies conducted with natural AX and further studies to be conducted with synthetic AX (including human clinical trials) to establish a separate ADI for synthetic AX.
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Cites
Astaxanthin in Skin Health, Repair, and Disease: A Comprehensive Review
Davinelli, S., Nielsen, M. E., & Scapagnini, G. (2018) · Nutrients · doi:10.3390/nu10040522 · Cited by 473
Yoshida, H., Yanai, H., Ito, K., Tomono, Y., Koikeda, T., Tsukahara, H., & Tada, N. (2010) · Atherosclerosis · doi:10.1016/j.atherosclerosis.2009.10.012 · Cited by 269
Cosmetic benefits of astaxanthin on humans subjects.
Tominaga, K., Hongo, N., Karato, M., & Yamashita, E. (2012) · Acta Biochimica Polonica · doi:10.18388/abp.2012_2168 · Cited by 248
Ito, N., Seki, S., & Ueda, F. (2018) · Nutrients · doi:10.3390/nu10070817 · Cited by 141
Stewart, J. S., Lignell, Å., Pettersson, A., Elfving, E., & Soni, M. G. (2008) · Food and Chemical Toxicology · doi:10.1016/j.fct.2008.05.038 · Cited by 138
Satoh, A., Tsuji, S., Okada, Y., Murakami, N., Urami, M., Nakagawa, K., Ishikura, M., Katagiri, M., Koga, Y., & Shirasawa, T. (2009) · Journal of Clinical Biochemistry and Nutrition · doi:10.3164/jcbn.08-238 · Cited by 135
OKADA, Y., ISHIKURA, M., & MAOKA, T. (2009) · Bioscience, Biotechnology, and Biochemistry · doi:10.1271/bbb.90078 · Cited by 94
Yoon, H.-S., Cho, H. H., Cho, S., Lee, S.-R., Shin, M.-H., & Chung, J. H. (2014) · Journal of Medicinal Food · doi:10.1089/jmf.2013.3060 · Cited by 93
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Trends in use, pharmacology, and clinical applications of emerging herbal nutraceuticals
Williamson, E. M., Liu, X., & Izzo, A. A. (2020) · British Journal of Pharmacology · doi:10.1111/bph.14943 · Cited by 304
Self-citationSaini, R. K., Prasad, P., Lokesh, V., Shang, X., Shin, J., Keum, Y.-S., & Lee, J.-H. (2022) · Antioxidants · doi:10.3390/antiox11040795 · Cited by 285
Structures of Astaxanthin and Their Consequences for Therapeutic Application
Brotosudarmo, T. H. P., Limantara, L., Setiyono, E., & Heriyanto (2020) · International Journal of Food Science · doi:10.1155/2020/2156582 · Cited by 167
Martínez-Álvarez, Ó., Calvo, M. M., & Gómez-Estaca, J. (2020) · Marine Drugs · doi:10.3390/md18080406 · Cited by 148
(BIOHAZ), E. P. O. B. H., Koutsoumanis, K., Allende, A., Alvarez‐Ordóñez, A., Bolton, D., Bover‐Cid, S., Chemaly, M., Davies, R., De Cesare, A., Hilbert, F., et al. (2022) · EFSA Journal · doi:10.2903/j.efsa.2022.7045 · Cited by 143
Metadata
- Authors
- Brendler, T., & Williamson, E. M.
- Venue
- Phytotherapy Research
- Publisher
- Wiley
- Published
- 2019-12
- Volume
- 33
- Issue
- 12
- Pages
- 3090-3111
- ISSN
- 0951-418X (ISSN-L)
- 1099-1573
- OpenAlex
- W2990363610
- Cited by
- 171
- References
- 8
- FWCI
- 6.73
- Type
- journal article
- Language
- en
- Open access
- closed
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