Maca Y Fertilidad (Agradeceremos al autor indicarnos la forma de referenciarlo)

 Hola He estado buscando un poco sobre la maca andina en pubmed(es un buscador de revistas cientificas, me dedico a ello que es de fiar). El caso es que he encontrado varios estudios en ratones, pero no en hombres. Os icluyo los enlaces, estan en ingles, asq resumo un poco
Espero que os ayude, nosotros vamos a empezar a tomarlo, pq la verdad estando en el punto en el que estamos, pues todo vale Y NUNCA SE SABE. El hecho de que haya estudios en humana en Peru, pero no en otros sitios puede depender de muchas cosas, para probar una cosa en personas se tienen que pasar 17000 controles, no es facil, y buscar voluntarios tampoco lo es. Con esto no quiero decir que sea la purga de benito, no lo se, pero bueno, lo cierto es que aqui hay mucha gente que lo toma...Lo unico que quisiera preguntar es dde lo puedo comprar por Internet que sea de fiar, si alguna me pudiera informar!
En este dice que aumenta la produccion espermatica, pero el mecanismo no esta relacionado con la alteracion de hormonas
Asian J Androl. 2001 Dec;3(4):301-3. Related Articles, Links


Lepidium meyenii (Maca) improved semen parameters in adult men.

Gonzales GF, Cordova A, Gonzales C, Chung A, Vega K, Villena A.

Department of Physiological Sciences, Faculty of Sciences and Philosophy and Instituto de Investigaciones de  la Altura, Universidad Peruana Cayetano Heredia, Lima, Peru. iiad@upch.edu.pe
Este otro dice que no altera los niveles hormonales(es del mismo tipo)
Effect of Lepidium meyenii (Maca), a root with aphrodisiac and fertility-enhancing properties, on serum reproductive hormone levels in adult healthy men.

Gonzales GF, Cordova A, Vega K, Chung A, Villena A, Gonez C.

Instituto de Investigaciones de la Altura, and Department of Biological and Physiological Sciences (Faculty of Sciences and Philosophy), Universidad Peruana Cayetano Heredia, PO 1843, Lima, Peru.

Lepidium meyenii (Maca) is a Peruvian hypocotyl that grows exclusively between 4000 and 4500 m in the central Andes. Maca is traditionally employed in the Andean region for its supposed aphrodisiac and/or fertility-enhancing properties. This study was a 12-week double-blind, placebo-controlled, randomized, parallel trial in which active treatment with different doses of Maca Gelatinizada was compared with a placebo. The study aimed to test the hypothesis that Maca has no effect on serum reproductive hormone levels in apparently healthy men when administered in doses used for aphrodisiac and/or fertility-enhancing properties. Men aged between 21 and 56 Years received 1500 mg or 3000 mg Maca. Serum levels of luteinizing hormone, follicle-stimulating hormone, prolactin, 17-alpha hydroxyprogesterone, testosterone and 17-beta estradiol were measured before and at 2, 4, 8 and 12 weeks of treatment with placebo or Maca (1.5 g or 3.0 g per day). Data showed that compared with placebo Maca had no effect on any of the hormones studied nor did the hormones show any changes over time. Multiple regression analysis showed that serum testosterone levels were not affected by treatment with Maca at any of the times studied (P, not significant). In conclusion, treatment with Maca does not affect serum reproductive hormone levels.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=12525260&query_hl=5&itool=pubmed_docsum

AIM: The present study was designed to determine the effect of a 4-month oral treatment with tablets of Lepidium meyenii (Maca) on seminal analysis in nine adult normal men aged 24-44 years old. METHODS: Nine men received tablets of Maca (1500 or 3000 mg/day) for 4 months. Seminal analysis was performed according to guidelines of the World Health Organization (WHO). Serum luteinizing hormone (LH), follicle stimulating hormone (FSH), prolactin (PRL), testosterone (T) and estradiol (E2) were measured before and after treatment. RESULTS: Treatment with Maca resulted in increased seminal volume, sperm count per ejaculum, motile sperm count, and sperm motility. Serum hormone levels were not modified with Maca treatment. Increase of sperm count was not related to dose of Maca. CONCLUSION: Maca improved sperm production and sperm motility by mechanisms not related to LH, FSH, PRL, T and E2.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=11753476&query_hl=5&itool=pubmed_docsum

Andrologia. 2002 Dec;34(6):367-72. Related Articles, Links

Y otra vez el mismo, que es un afrodisiaco

Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men.

Gonzales GF, Cordova A, Vega K, Chung A, Villena A, Gonez C, Castillo S.

Instituto de Investigaciones de la Altura, Universidad Peruana Cayetano Heredia, Lima, Peru. iiad@upch.edu.pe

This study was a 12-week double blind placebo-controlled, randomized, parallel trial in which active treatment with different doses of Maca Gelatinizada was compared with placebo. The study aimed to demonstrate if effect of Maca on subjective report of sexual desire was because of effect on mood or serum testosterone levels. Men aged 21-56 years received Maca in one of two doses: 1,500 mg or 3,000 mg or placebo. Self-perception on sexual desire, score for Hamilton test for depression, and Hamilton test for anxiety were measured at 4, 8 and 12 weeks of treatment. An improvement in sexual desire was observed with Maca since 8 weeks of treatment. Serum testosterone and oestradiol levels were not different in men treated with Maca and in those treated with placebo (P:NS). Logistic regression analysis showed that Maca has an independent effect on sexual desire at 8 and 12 weeks of treatment, and this effect is not because of changes in either Hamilton scores for depression or anxiety or serum testosterone and oestradiol levels. In conclusion, treatment with Maca improved sexual desire.

Estos son en ratas:
Que ayuda a prevenir la osteoporosis
J Ethnopharmacol. 2006 Feb 6; [Epub ahead of print] Related Articles, Links


Effect of ethanol extract of Lepidium meyenii Walp. on osteoporosis in ovariectomized rat.

Zhang Y, Yu L, Ao M, Jin W.

School of Life Science & Technology, Huazhong University of Science & Technology, 430074 Wuhan, PR China.

Maca (Lepidium meyenii Walp.) is a cruciferous plant from the Andes of Peru. The root of Maca is traditionally employed for its supposed properties in aphrodisiacs and improving fertility, it also has been widely used to help alleviate the symptoms of menopause. The purpose of this study was to evaluate the effect of ethanol extract of Maca on postmenopausal osteoporosis in ovariectomized rats. Female Sprague-Dawley rats were divided into four groups: Sham-operated and ovariectomized groups were fed with equivolume of distilled water, and the remaining ovariectomized groups were orally administrated with ethanol extract of Maca at 0.096 and 0.24g/kg for 28 weeks. The findings derived from the basis of bone mineral density, biomechanical, biochemical and histopathological parameters indicated that higher dose of ethanol extract of Maca was effective in the prevention of estrogen deficient bone loss.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=16466876&query_hl=10&itool=pubmed_docsum

Otro en ratas que mejora la espermatogenesis(la formacion de los bichitos)

J Ethnopharmacol. 2006 Feb 20;103(3):448-54. Epub 2005 Sep 19. Related Articles, Links


Effect of short-term and long-term treatments with three ecotypes of Lepidium meyenii (MACA) on spermatogenesis in rats.

Gonzales C, Rubio J, Gasco M, Nieto J, Yucra S, Gonzales GF.

Department of Biological and Physiological Sciences, Faculty of Sciences and Philosophy, Instituto de Investigaciones de la Altura, Universidad Peruana Cayetano Heredia, P.O. Box 1843, Lima, Peru.

Lepidium meyenii (Brassicaceae), known as Maca, is a Peruvian hypocotyl that grows exclusively between 4000 and 4500m above sea level in the central Andes. Maca is traditionally employed in the Andean region for its supposed fertility-enhancing properties. The study aimed to test the hypothesis that different ecotypes of Maca (Red, Yellow and Black) after short-term (7 days) and long-term (42 days) treatment affects differentially spermatogenesis adult rats. After 7 days of treatment with Yellow and Red Maca, the length of stage VIII was increased (P<0.05), whereas with Black Maca stages II-VI and VIII were increased (P<0.05). Daily sperm production (DSP) was increased in the group treated with Black Maca compared with control values (P<0.05). Red or Yellow Maca did not alter DSP and epididymal sperm motility was not affected by treatment with any ecotype of Maca. After 42 days of treatment, Black Maca was the only ecotype that enhanced DSP (P<0.05). Moreover, Black Maca was the only that increased epididymal sperm motility (P<0.05). In relation to the control group, Red Maca did not affect testicular and epididymal weight nor epididymal sperm motility and sperm count; however, prostate weight was reduced (P<0.05). Black or Yellow Maca did not affect prostate weight. In conclusion, there were differences in the biological response of the three ecotypes of Maca (Yellow, Red and Black). Black Maca appeared to have more beneficial effect on sperm counts and epididymal sperm motility.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=16174556&query_hl=10&itool=pubmed_docsum