How Supplement Brands Increase AOV with Shopify Refill Upsells

Supplement customers are repeat buyers by nature. The challenge is capturing the second purchase while intent is still hot. Email flows help later; post-purchase upsells capture buyers in the same session.

High-performing offer types

• 90-day refill at a slight bundle discount
• Travel pack for gym or travel buyers
• Complementary product (collagen + vitamin C, pre + electrolytes)
• Family or twin pack for household SKUs

Messaging that converts

Use reassurance, not hype: 'Add a 90-day supply to this order — one click, same address.' Supplement buyers respond to simplicity and supply continuity. Avoid aggressive countdown timers on post-purchase; the order is already done.

If your hero SKU is subscription-capable, post-purchase can still promote a one-time refill — lowering commitment while increasing first-order AOV.

Pricing the app vs. revenue share

Many upsell tools charge a percentage of upsell revenue. At scale, a flat monthly fee (like RefillPost's $29 Growth plan) keeps more margin on every incremental bottle, tub, or pouch you sell.