
Beta-carotene is an organic compound - a terpenoid, a red-orange pigment abundant in plants and fruits. As a carotene with β-rings at both ends, it is the most common form of carotene. It is a precursor (inactive form) of vitamin A. Being highly conjugated, it is deeply colored, and as a hydrocarbon lacking functional groups, it is very lipophilic.
The structure was deduced by Karrer et al. In nature, β-carotene is a precursor to vitamin A via the action of β-carotene dioxygenase. β-carotene is also the substance in carrots that colours them orange. β-Carotenoid is biosynthesized from geranylgeranyl pyrophosphate.
Plant carotenoids are the primary dietary source of vitamin A worldwide. The most efficient pro-vitamin A carotenoid is beta-carotene, which is abundant in Vietnam Gac (Momordica Cochinchinensis Spreng), crude palm oil, yellow and orange fruits, such as mangoes, papayas, and yams and in green leafy vegetables such as spinach, kale, sweet potato leaves, and sweet gourd leaves. Vietnam gac and crude palm oil have by far the highest content of β-carotene of any known fruit or vegetable, 10 times higher than carrots for example. Unfortunately, Gac is quite rare and unknown outside its native region of SE Asia, and crude palm oil is typically processed to remove the cartenoids before sale to improve the color and clarity.
±Comparisons based on independent lab tests conducted in October 2005 (Lot #FJ41315203A), April 2006 (Lot #01B614) and June 2006 (Lot #00438326, #T01 and #S060982). The product and company names are registered trademarks of their respective companies.
| Vitamins | Daily Value |
Mangosteen Plus™± |
Thai-Go™± | XanGo®± | Naturally Thai Mangost een± |
Mango•xan®± |
| Beta Carotene IU/oz |
5000 IU | 2,500 | <5 | 5.4 | 347 | <5 |
| Vitamin C mg/oz |
60 mg | 410 | < 0.1 | 5.2 | 0.10 | 65.6 |
| Vitamin D3 IU/oz | 400 IU | 1107 | 43.5 | 24.2 | 0 | < 5 |
| Vitamin E as d-alpha tocopherol IU/oz |
30 IU | 63.04 | 0.45 | < 0.1 | 0.37 | 2.46 |
| Vitamin B1 mg/oz |
1.5 mg | 1.83 | < 0.5 | < 0.5 | < 0.5 | < 0.5 |
| Vitamin B2 mg/oz |
1.7 mg | 2.14 | < 0.5 | < 0.5 | < 0.5 | < 0.5 |
| Vitamin B6 mg/oz |
2 mg | 6.05 | < 0.5 | < 0.5 | < 0.5 | < 0.5 |
| Vitamin B3 mg/oz |
20 mg | 23.52 | < 0.5 | < 0.5 | < 0.5 | < 0.5 |
| Folic Acid mcg/oz |
400 mcg | 870 | < 10 | < 10 | 35.97 | < 0.5 |
| Vitamin B12 mcg/oz |
6 mcg | 15.60 | < 5 | < 0.5 | < 0.5 | Interfered±± |
| Biotin mcg/oz |
300 mcg | 312 | 36 | < 20 | 38.58 | < 20 |
| Pantothenic Acid mg/oz | 10 mg | 13.86 | < 1 | < 1 | 1.64 | Interfered±± |
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease. ± Comparisons based on independent lab tests conducted in July 2003 (Lot #B12184), February 2004 (Lot #A01), June 2004 (Lot #00455304), November 2004 (Lot #01B401), April 2006 (Lot #01B612), May 2006 (Lot #FJ41315203A) and October 2007 (Lot #ASA07264). The product and company names are registered trademarks of their respective companies. ±±Interference by the matrix of the product.
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