Isn't this worthless without DAO in it?

As per our manufacturer, Nature's Sunshine says, "HistaBlock provides nutrients that support healthy respiratory function as the body battles irritants, pollutants and toxins. Stinging nettle provides well-known support against seasonal airborne substances. This formula provides antioxidant strength to help stabilize mast cells. The antioxidant quercetin has been used for its reputed effects in supporting the respiratory system. Quercetin may help stabilize cells that release compounds when exposed to irritants. Bromelain is an enzyme that works to help reduce the swelling of mucous membranes during times of respiratory stress. Bitter orange contains synephrine, which helps the body support open airways." In addition Nature's Sunshine says, "As for if it works best with Diamine Oxidase you should ask an herbalist."

Which are the ingredients?

The nettle leaf takes away the toxins and the brimelsin is an enzyme that helps inflammation.

Is this the same as D-Hist?

It is not the same as D-Hist but contains similar ingredients.

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🌿 Breathe easy, live fully — your natural defense against seasonal stress!

BITTER ORANGE BOOST - Synephrine helps maintain open airways during stress
NATURAL SINUS SUPPORT - Nutrients work synergistically to ease respiratory discomfort
CONVENIENT CAPSULE FORMAT - Easy-to-take 90 capsules for lasting wellness
SEASONAL SHIELD WITH NETTLE - Proprietary nettle formula combats airborne irritants
ENZYME POWERED ALLERGY DEFENSE - Bromelain reduces mucous swelling for clearer breathing

Nature's Sunshine Histablock delivers a potent blend of bromelain, nettle, and bitter orange in 90 easy-to-take capsules, designed to support healthy respiratory function and reduce allergy-related discomfort naturally.

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