No. Probiotic supplements are not necessary to be healthy. If you are thinking of taking a probiotic supplement, talk to your doctor or dietitian. Your doctor or dietitian can help you choose the product and dose that is right for you. This is still not a guarantee that the product will be effective. Probiotic supplements are regulated under the Natural Health Products Regulations in Canada. This means that probiotic supplements must meet certain standards to be sold in Canada.