Johnson Compounding and Wellness, in Waltham, is hosting a Customer Appreciation Day from 9 a.m. to 5 p.m., April 11, offering a 20 percent discount on everything in the store, including sale items.

From 10 a.m. to 2 p.m., the event features holistic practitioners demonstrating their therapies, free chair massages, vegan cooking demos and tastings, and representatives from the center’s most highly regarded vendors offering samples and wellness tips while answering customer questions. Visitors can also take advantage of personalized compression stocking fittings, as well as demos and discussions of low level light laser therapy and portable ultrasound therapy. Dr. Alex Bingham, a functional medicine practitioner from the Rothfeld Center, will be on hand to answer questions about integrative medicine.

Cost: Free. Location: Johnson Compounding and Wellness, 577 Main St., Waltham. To learn more, call 781-893-3870 or visit NaturalCompounder.com.