Vitamin B12 is a critical nutrient that is often inadequate in a plant-based (vegan) diet, thus the inclusion of a reliable vitamin B12 source in a vegan diet is recommended as essential. Unfortunately, many natural sources of vitamin B12 have been proven to contain biologically inactive vitamin B12 analogues, inadequate for human supplementation. The aim of this non-randomized open trial was to determine whether supplementation with a natural Klamath algae-based product ("AFA-B12", Aphanizomenon flos-aquae algae plus a proprietary mix of enzymes) could favorably affect the vitamin B12 status of a group of 15 vegan subjects. By assessing blood concentration of vitamin B12, folate, and more importantly homocysteine (Hcy, a reliable marker in vegans of their B12 absorption), the vitamin B12 status of the participants at the end of the 3-month intervention period, while receiving the Klamath-algae supplement (T2), was compared with their vitamin B12 status at the end of the 3-month control period (T1), when they were not receiving any supplement, having stopped taking their usual vitamin B12 supplement at the beginning of the study (T0). Compared to the control period, in the intervention period participants improved their vitamin B12 status, significantly reducing Hcy blood concentration (p=0.003). In conclusion, the Klamath algae product AFA-B12 appears to be, in a preliminary study, an adequate and reliable source of vitamin B12 in humans.

BACKGROUND:The purpose of the present study is to explore the effect of yoga on the serum levels of homocysteine and nitric oxide (NO) in a cohort of women with primary dysmenorrhea and normal healthy controls.

METHODS:A prospective controlled trial was conducted in 35 women with primary dysmenorrhea and 35 healthy controls in a community-based study. Short-form Menstrual Distress Questionnaires (MDQs) were administered to assess the menstrual symptoms. All participants were provided yoga intervention, twice a week at 30 minutes/session, consecutively for 8 weeks. Blood samples were drawn from each woman on the third day of the menstrual cycle. Assessments of MDQs and blood samples for the determination of homocysteine and NO concentrations were performed at baseline and within the first 3 days of their next menses after completion of yoga intervention.

RESULTS:A total of 30 women from the dysmenorrheal group and 30 from the control group completed the study. Homocysteine levels were higher in those with dysmenorrhea when compared with healthy controls before yoga intervention (Mann-Whitney U test, p<0.05); however, no statistically significant differences were found between the two groups after 8 weeks of yoga training (p<0.05). The concentrations of homocysteine in both the dysmenorrheal and control groups after 8 weeks decreased by 51.37% and 46.46%, respectively (p<0.001). There were no statistically significant differences in NO levels between the two groups at baseline and after intervention. The total scores on the MDQs decreased significantly after yoga intervention in the dysmenorrheal group (p<0.05).

CONCLUSIONS:Yoga intervention was found to be associated with reductions in severity of dysmenorrhea and may be effective in lowering serum homocysteine levels after an intervention period of 8 weeks. These observations suggest that yoga may have therapeutic effects in women by restoring endothelial function.