Thank you for your video, Dr Brown. Evidence supports that a true multi-digestive enzyme deficiency is rare. If you had this condition, you would know about it - you would be losing weight, suffering from malnourishment and failing to thrive in any meaningful way. There are some cases where taking enzyme supplements is indicated, but these should be specific, single digestive enzymes such as for fructose or lactose intolerance and for those who struggle with legumes such as beans and pulses.