I think my options are

Puritan's Pride Methylcobalamin Vitamin B-12 1000 mcg 1000 mcg / 30 Microlozenges
24 bottles - 720 tables (2 people for 1 year) costs $47.92 @ $.07/ 1mg tablet

Source Naturals, MethylCobalamin, Cherry Flavored Sublingual, 1 mg, 120 Tablets
6 bottles - 720 tablets (2 people for 1 year) costs $53.70 @ $.07/ 1mg tablet

CostCo Kirkland Signature™ Sublingual B-12 5000 mcg., 300 Tablets
3 bottles - 900 tablets (2 people for ? year) costs $62.97 costs
@ $.07/ 5mg tablet - $.01/ 1mg tablet

So two Kirkland per week is 10mg or 7 other is 7 mg -- big cost difference.

My initial thinking was that it would be better to space it out to even out the absorption, but your comments suggest that is not necessary. So I take 5mg per day and see where is my B12 level. Please explain again why I should not take B12 for 4-7 days before the blood work?

Thank your for your assistance.

Mike