What's the suggested dose of vitamin b6?

Depends on age: Recommended dietary allowances (rdas) for vitamin b6 age male female pregnancy lactation birth to 6 months 0.1 mg* 0.1 mg* 7–12 months 0.3 mg* 0.3 mg* 1–3 years 0.5 mg 0.5 mg 4–8 years 0.6 mg 0.6 mg 9–13 years 1.0 mg 1.0 mg 14–18 years 1.3 mg 1.2 mg 1.9 mg 2.0 mg 19–50 years 1.3 mg 1.3 mg 1.9 mg 2.0 mg 51+ years 1.7 mg 1.5 mg http://ods.Od.Nih.Gov/factsheets/vitaminb6-hea.

B6: For adults with B6 deficiency, start with 2.5mg. to 25mg. daily for 3 weeks, then maintenance dose of 1.5-2.5 mg. per day. For women on Birth control pills, use 25mg. per day. For PMS , use 50-100mg. per day.