Ling Yunxi, who was listening to the lecture, turned around and revealed a forced smile.

"Come, let me tell you what oxalic acid is and what calcium is."

She turned around, picked up the quill pen on the table, and leaned over to write the chemical formulas for oxalic acid and calcium.

"This is oxalic acid, this is calcium..."

Xiao Yeyu did not expect her to suddenly approach.

He instinctively pulled his neck back and his whole body moved back a little without his noticing.

Ling Yunxi noticed his subtle movements, gave a silent snort, and continued:

“Our gastric juice contains a large amount of hydrochloric acid, and oxalic acid will react with gastric acid first to release oxalate ions.”

"The calcium in the meat we eat usually exists in the ionic form Ca2+, which is more soluble in acidic solutions, making it easier for the two to come into contact."

"When chyme enters the small intestine, the pH is close to neutral, and oxalate ions directly combine with calcium ions to form calcium oxalate precipitate (CaC₂O₃)."

Xiao Yeyu's gaze fell on her hand holding the quill pen. Her fingertips were rounded, and at this moment, they didn't seem as repulsive as he had imagined.

“Calcium oxalate has extremely low solubility. If excessive oxalate binds with calcium in the intestines, the unabsorbed calcium oxalate may be excreted in the urine.”

When she mentioned urine, Xiao Yeyu's ears suddenly flushed red, "Cough cough..."

"When urine is concentrated, calcium oxalate crystals are more likely to deposit and form stones."

"Oxalic acid can bind with calcium in food, reducing the body's absorption of calcium, which may lead to calcium deficiency in the long term."

After Ling Yunxi finished explaining, she looked up at him, blinked, and continued to wear the same fake smile as before.

"hiss……"

Xiao Yeyu frowned, listening to her explanation, he was even more confused, looking like he only half understood.

Surprisingly, she actually managed to keep coming up with these strange and bizarre things.

But it seems to make some sense.

"According to you, why can oxalic acid be removed by blanching?"

“Actually, it’s not completely gone,” Ling Yunxi said. “It’s just that most of it has been removed, and the rest doesn’t pose any threat to the body.”

"I see……"