Any Thrivers out there?

My SO and I recently started Thriving and I love it! I had my Nexplanon taken out on the 16th and asked the doc if she thought it was safe to continue while TTC and after conception. She admitted she is not familiar with the product but doesn't recommend because of the lack of research and concerns about the link between high levels of B12 and autism. I've read a few testimonials and talked to a couple women who have had positive experiences and even say they're doctors (who reviewed the ingredients) not only have the ok but we're also impressed at what it was doing for mom and baby. I haven't found any reports of negative experiences. Any thoughts, insights, or doc referrals who are familiar with the products?