What makes SISU Ester-C better than other Vitamin C?

• The natural metabolites provide quicker absorption and longer retention than any other form of Vitamin C.
• It offers 24-hour advanced immune support!
• It is easier on the stomach than ordinary Vitamin C, or ascorbic acid
• Ester-C is a less acidic and more digestible form of Vitamin C
• While other Calcium ascorbates are also easy on the stomach, they aren't as bioavailable; one study discovered that the absorption rate of regular Calcium Ascorbate was half that of Ester-C*
• It was the first ever Vitamin C to receive a patent (April 18, 1989)

Are there any studies that back up these claims?

• Yes, Ester-C is backed by science!
• The patented Ester-C has been scientifically proven to increase vitamin C absorption.*
• Studies show that there is less vitamin C loss in urine with patented Ester-C and that it remains active in the white blood cells for 24 hours.*
• In one study, taking Ester-C resulted in fewer respiratory tract infections and those who did get sick recovered faster and were much less likely to develop a second respiratory infection vs. placebo.*
• A recent published study showed that Ester-C is less acidic and easier on the stomach than ascorbic acid.*

24-Hour Immune Support- a recent clinical study shows that Ester-C increases vitamin C levels in the body for up to 24 hours.

Backed by Science- the patented Ester-C has been studied for decades and has been scientifically proven to increase vitamin C absorption.

Quick Absorption- Ester-C is formulated with naturally-occurring metabolites that maximize the absorption and retention of vitamin C in your body.

Gentle on the Stomach- Ester-C is non-acidic, making it gentle on the digestive system.