Pycnogenol (French Maritime Pine Bark) for the Treatment of Gulf War Illness

Inclusion Criteria: * Meet the Kansas GWI case definition * Meet the CDC GWI case definition * Able to commit to a 12-month study * Male * Participants will be individuals in our Gulf War database who have already completed our other botanical trial, Curcumin, Resveratrol, and Stinging Nettle as Treatments for Gulf War Illness (NCT05377242). Exclusion Criteria: * Currently involved in another experimental treatment study * Female * Have a blood clotting disorder * Reported diagnosis of diabetes with a A1C greater than 9 * Use of contraindicated medications (see below): * Anticoagulants (such as warfarin, heparin, etc.) * Lithium * Tacrolimus (Prograf) * Cancer medications (Alkylating agents, antitumor antibiotics, Topoisomerase I inhibitors, Tamoxifen) * Daily Use of Antiplatelet agents (e.g. aspirin, clopidogrel) * Nitroglycerin * Hypotension * Need for surgery during study period.