Ester-C 500mg by American Health, 225 Vegetarian Tablets

Gentle and Non-Acidic, Patented Vitamin C Formula, 100% Vegetarian
You need your immune system working at its very best, 24 hours a day. Ester-C® is an innovative, patented Vitamin C formula designed to stay in your white blood cells for 24 hours, providing you with around-the-clock immune system support. Ester-C® is manufactured using a unique, water-based process that combines Vitamin C with Calcium using no chemical solvents – making it non-acidic, and gentle on the stomach. Made in the USA.
Php 1300
You need your immune system working at its very best, 24 hours a day. Ester-C® is an innovative, patented Vitamin C formula designed to stay in your white blood cells for 24 hours, providing you with around-the-clock immune system support. Ester-C® is manufactured using a unique, water-based process that combines Vitamin C with Calcium using no chemical solvents – making it non-acidic, and gentle on the stomach. Made in the USA.
Php 1300
Ester-C 500mg by California Nutrition, 60 Capsules

Calcium Ascorbate, better known as Ester-C, is a highly absorbable, non-acidic form of vitamin C designed to stay in the body for 24 hours, providing round-the-clock immune system support. It's specially formulated to be gentle and non-acidic, preventing stomach irritation. Ester-C promotes immune system health, healthy vision and cardiovascular function as well as delivering antioxidant protection and features 500 mg vitamin C in each capsule. Made in the USA.
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Ester-C 500mg by NatureSmart, 300 Tablets

*24 Hour Immune Support *Stomach Friendly *Non-GMO
Ester-C is the patented immune health formula that stays in your system for 24 hours - so you have the kind of support you can count on 24/7. Ester-C is carefully formulated to contain naturally occuring metabolites. Metabolites are substance derived from other compounds during process of metabolism. The metabolites in Ester-C help enhance the retention of Vitamin C by your white blood cells, which are a vital component of your immune system. Made in the USA.
Php 1200
Ester-C is the patented immune health formula that stays in your system for 24 hours - so you have the kind of support you can count on 24/7. Ester-C is carefully formulated to contain naturally occuring metabolites. Metabolites are substance derived from other compounds during process of metabolism. The metabolites in Ester-C help enhance the retention of Vitamin C by your white blood cells, which are a vital component of your immune system. Made in the USA.
Php 1200