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Life Extension manufactures its NAC in cGMP-compliant facilities, third-party tests it for purity and potency, and backs it with a 365-day money-back guarantee

It works by mimicking a hormone called GLP-1, which helps to regulate blood sugar levels

Conventional approaches to weight loss, such as diet and exercise alone, do not affect these same hormone pathways, so weight loss is slower and more erratic

Upfront pricing lets you compare your copay, cash price, and RxPass eligibility before you place an order

Prices current as of May 2026

The use of a Cissus quadrangularis/Irvingia gabonensis combination in the management of weight loss: a double-blind placebo-controlled study