FREE So Good So You Probiotic Shot Posted On May 14, 2021 Get a FREE So Good So You Probiotic Shot! So Good is offering (mailed voucher) to people who get their COVID-19 vaccination. This program runs through June 30, 2021. Click “GET YOUR FREE SHOT” then provide your mailing info and answer a few questions and they will mail your free product vouchers a few weeks after the promo ends.