Twitter Weight Loss Challenge

TL;DR

Justin Mares (founder of Kettle & Fire and Perfect Keto) runs a 30-day weight loss challenge. Participants Venmo him $800, receive a continuous blood glucose monitor for 28 days, and get $25 back each day their glucose stays in his prescribed range; otherwise he keeps the money. Net cost is ~$100 for the device if you stick to the plan.

Key insights

• The challenge uses financial commitment ($800 upfront) combined with daily glucose monitoring and micro-payouts ($25/day) to enforce adherence.
• Justin Mares is the founder of two keto-focused companies (Kettle & Fire, Perfect Keto) with a combined ~$100M+ run rate.
• The blood glucose monitor typically costs $300–$400, but participants effectively pay $100 net if they follow the plan exactly.