The 7 worst foods for osteoporosis, checked against the evidence

Lists of the "7 worst foods for osteoporosis" are everywhere, and they mix real evidence with old myths. Here is each usual suspect, checked against the research, with a plain verdict.

The verdicts at a glance

1. Heavy drinking

A dose-response meta-analysis pooled 8 studies with 240,871 people. Compared with no alcohol, three drinks a day was linked with a 33 percent higher risk of hip fracture, and four drinks with 59 percent.¹ At one or two drinks a day, bone density was not lower, and was even slightly higher, so the clear harm starts with heavy drinking. That is not a reason to start drinking.

2. Cola

In the Framingham Osteoporosis Study, women who drank cola every day had 3.7 percent lower bone density at the femoral neck of the hip than women who drank it less than once a month. Diet cola showed a similar link, and decaffeinated cola a weaker one. Other fizzy drinks showed no link, and the effect was not seen in men.² The study was observational, so it cannot prove cola causes bone loss, but swapping cola for water or milk costs nothing.

3. Very salty food

A 2025 meta-analysis of randomized trials in postmenopausal women found that high sodium diets increased the calcium lost in urine by about 29 mg a day.³ The authors note there are few studies, but they recommend limiting salt to help protect bone. Most salt comes from processed and restaurant food rather than the salt shaker.

4. Lots of coffee

A meta-analysis of 15 studies with more than 250,000 people found that women drinking the most coffee had a 14 percent higher risk of fracture. The dose matters: at 2 cups a day the extra risk was about 2 percent, and at 8 cups about 54 percent.⁴ A few cups a day, with enough calcium, is not a concern for most women.

5. High dose vitamin A

In the Nurses' Health Study, women with the highest vitamin A intake had a 48 percent higher risk of hip fracture, and the risk came mainly from retinol, the form in supplements, fortified foods and liver. Beta carotene from fruit and vegetables did not raise the risk.⁵ The practical point is to avoid high dose vitamin A supplements unless your doctor has prescribed them, and not to eat liver often.

6. Spinach: not bad, just a poor calcium source

Spinach is often on these lists because it contains oxalate, which binds its calcium. In a direct comparison, people absorbed about 27.6 percent of the calcium in milk but only 5.1 percent of the calcium in spinach.⁶ So spinach is fine to eat. Just do not count its calcium toward your daily 1,200 mg.⁸

7. Protein: not harmful

High protein foods used to be blamed for leaching calcium from bone. A review commissioned by the National Osteoporosis Foundation, covering 16 randomized trials and 20 long-term studies, found no adverse effects of higher protein intake on bone, and moderate evidence of a small benefit for spine bone density.⁷ Does protein weaken your bones? covers the full story.

The bigger risk: what is missing

For most women, what is missing from the plate matters more than any single food on it. After 50, women need 1,200 mg of calcium and 600 IU of vitamin D a day.⁸ Protein supports the muscle that protects you from falls. Several foods cover both:

• yogurt and milk
• cheese
• calcium-set tofu
• canned salmon or sardines with the bones

Protein Buddy works out a daily protein target from a short quiz on your weight, age, activity and goal, and Home shows how many grams are left today as you log. Typing meals in by hand is free with no limit. The osteoporosis diet lists the foods that carry calcium and protein together.

Talk to your doctor

If you have osteoporosis or have had a fracture after 50, food is only part of the picture. Your doctor can check your bone density, your vitamin D level and whether you need medication. What osteoporosis is explains the condition and screening.