Dear customer, not to worry as the brown color is normal. It is a particle from the insoluble particles from the fruits extract. As for different batch of Kinohimitsu Marine Collagen, different batch of fruits were used, hence they will vary slightly in term of the sugar content and the content of insoluble versus soluble particles in the fruit itself. Different batch might have different color due to the amount of the brown insoluble fruit particles. However this does not affect the nutrient content and effectiveness.
We're uncertain on the salt and sugar percentage. However, the sweet taste is due to the presence of lychee powder, Honey powder, and slight sour due to Vitamin C, DL-Malic Acid and Citric Acid.
The recommended dosage is 1 scoops of Kinohimitsu Marine Collagen per day to fulfill our daily need of 2500-5000mg of collagen. You may also take up to 2 scoops per day, before breakfast or bedtime to enhance the result.
Hope these answer your questions