Can Guinea Pigs Eat Vine Spinach?

Also known as red vine spinach, climbing spinach, creeping spinach, buffalo spinach, and Malabar spinach
It is a leaf vegetable that is found in tropical Africa and Asia.
So can guinea pigs eat vine spinach and if they can, how much of it can be eaten?

Lets take a look and find out more here, but looking closer at its nutritional data.
In particular, its calcium, phosphorous, sugar, fat and acidic content.
Vinespinach, (basella), raw
Nutritional value per 100 g (3.5 oz)
Energyt79 kJ (19 kcal)
Carbohydratest3.4 g
Fatt0.3 g
Proteint1.8 g
Vitamin A equiv.t400 μg (50%)
Thiamine (vit. B1)t0.05 mg (4%)
Riboflavin (vit. B2)t0.155 mg (13%)
Niacin (vit. B3)t0.5 mg (3%)
Vitamin B6t0.24 mg (18%)
Folate (vit. B9)t140 μg (35%)
Vitamin Ct102 mg (123%)
Calciumt109 mg (11%)
Iront1.2 mg (9%)
Magnesiumt65 mg (18%)
Manganeset0.735 mg (35%)
Phosphorust52 mg (7%)
Potassiumt510 mg (11%)
Zinct0.43 mg (5%)
(source: Wikipedia)
As you can see vine spinach does contain some phosphorus, calcium, and is quite acidic, plus a hint of fat.
It does also contain a huge amount of vitamin c as well.
From the above information, guinea pigs can eat vine spinach, but only on a weekly basis, because of its calcium, phosphorus, and acidic content.