About SerretiaSerretia by Arthur Andrew Medical is one of the world's strongest serrapeptase supplements, with a minimum activity of 250,000 SPU per two-capsule dose. Taken between meals, serrapeptase may help support clear sinuses, normal recovery, and comfort after over-exertion. 250,000 SPU minimum activity per 2-capsule dose Pure serrapeptase — no fillers May help support sinus health, recovery and everyday comfort Manufactured in the USA by Arthur Andrew Medical — enzyme specialists since 2003 Stocked and shipped from Australia by StoneAge Health.Also from Arthur Andrew: Neprinol AFD systemic enzymes, Syntol AMD daily probiotic and Devigest ADS digestive enzymes. Or shop the full Arthur Andrew range.