I have a problem. My fields are showing in the meta box, but saving does not work:

// Create the metabox and fields
function food_meta_box_markup($object) {
wp_nonce_field(basename(__FILE__), "meta-box-nonce");
?>

<div>
    <label for="np-calories" class="np-label"><?php _e( 'Energy (kcal)', 'nutriplus' ) ?></label>
    <input name="np_calories" type="number" class="np-field" value="<?php echo get_post_meta($object->ID, "np_calories", true); ?>">
</div>

<?php
}

function add_food_meta_box() {
add_meta_box("food-meta-box", __( 'Nutritional Information', 'nutriplus' ), "food_meta_box_markup", "np-food", "side", "high", null);
}

add_action("add_meta_boxes", "add_food_meta_box");    
// Save the metabox and fields
function food_save_meta_box_data( $post_id ){

// verify taxonomies meta box nonce

if ( !isset( $_POST['food_meta_box_nonce'] ) || !wp_verify_nonce( $_POST['food_meta_box_nonce'], basename( __FILE__ ) ) ){
return;
}

// return if autosave
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ){
return;
}

// Check the user's permissions.
if ( ! current_user_can( 'edit_post', $post_id ) ){
return;
}

if( $post->post_type == "np-food" ) {   

// store custom fields values
// energy kcal string
if ( isset( $_REQUEST['np_calories'] ) ) {
    update_post_meta( $post_id, 'np_calories', sanitize_text_field( $_POST['np_calories'] ) );
}
}
}
add_action( 'save_post_food', 'food_save_meta_box_data' );

?>

My Metabox values don´t save 🙁

Regards

Buddy