Whey protein granules

Protein granules comprising a whey protein as a main component,

• wherein the protein granules have an average particle diameter of 207 μm to 570 μm, a homogeneity U of 0.58 or less, a content ratio (volume ratio) of a coarse powder having a particle diameter of 500 μm or more of 22% or less, and a content ratio (volume ratio) of a fine powder having a particle diameter of 150 μm or less of 31% or less, and
• wherein the average particle diameter, the homogeneity U, the content ratio (volume ratio) of the coarse powder having a particle diameter of 500 μm or more, and the content ratio (volume ratio) of the fine powder having a particle diameter of 150 μm or less, are determined by the following measurement method:
• 1. A volume-based particle size distribution in which data is plotted with the particle diameter as a horizontal axis and with a content ratio of particles as a vertical axis is obtained for the granules by a laser diffraction and scattering measurement method,
• 2. The average particle diameter and the content ratio (volume ratio) of the coarse powder and the content ratio (volume ratio) of the fine powder are determined from the volume-based particle size distribution, and
• 3. The homogeneity U is determined by the following formula (1),
• U
• =
• ∑
• X
• i
• ⁢
• ❘
• "\[LeftBracketingBar]"
• D
• i
• -
• D
• p
• ❘
• "\[RightBracketingBar]"
• D
• p
• (
• 1
• )
• where, in the formula (1), Dp is an average particle diameter (μm), Xi is a content ratio of particles at each particle diameter in the volume-based particle size distribution, and Di is a particle diameter (μm) of each particle.