1. Ready-to-drink beverage containing protein liquid, a stabilizer and a food acid cocoa extract containing cocoa polyphenols, and having a pH below 4,6.2. The beverage of claim 1 having a pH below 4,2.3. The beverage of claim 1 having a pH of from about 3.5 to about 4,0.4. The beverage of claim 1 having a pH of from about 3.8 to about 4,0.5. The beverage of claim 1, wherein the stabilizer is a pectin with a high content metoksila.6. The beverage of claim 1, wherein the edible acid is citric kislotu.7. The beverage of claim 2, comprising at least 100 mg per serving at least one flavonol and / or protsianidina.8. The beverage of claim 2, comprising at least 200 mg per serving at least one flavonol and / or protsianidina.9. The beverage of claim 1, which is a flavored drink different from shokoladnogo.10. The beverage of claim 2, which is a flavored drink different from shokoladnogo.11. Beverage according to claim 3, which is a flavored drink different from shokoladnogo.12. The beverage of claim 11 which is a beverage based moloka.13. The beverage of claim 2, wherein the stored at least eighty percent (80%) of a (-) - epicatechin after treatment after six (6) months of storage at room temperature.14. The beverage of claim 2, wherein the stored at least eighty percent (80%) of a (-) - epicatechin after treatment after nine (9) months of storage at room temperature.15. The beverage of claim 2, wherein the stored at least ninety percent (90%) of a (-) - epicatechin after treatment after six (6) months of storage at room temperature.16. The beverage of claim 2, wherein the stored at least ninety percent (90%) quant1. Готовый к употреблению напиток, содержащий белковую жидкость, стабилизатор, пищевую кислоту и экстракт какао, содержащий полифенолы какао, и имеющий pH ниже 4,6.2. Напиток по п.1, имеющий pH ниже 4,2.3. Напиток по п.1, имеющий рН от около 3,5 до около 4,0.4. Напиток по п.1, имеющий рН от около 3,8 до около 4,0.5. Напиток по п.1, в котором стабилизатор предста