I can't resist looking at research so found the article you referred to and it seems very promising. (With a strontium caveat noted below.) The abstract excerpt below makes an argument for at least looking at supplements to address osteoporosis, if only as an additional protocol to prescription drugs.

A long version of the article suggests that osteoporosis may, in part, be a result of nutritional deficiencies.

At any rate this study suggests that the supplements given were possibly as effective as some common prescription drugs for osteoporosis. [Note the caveat that they included strontium. So if the measure of success is DEXA scores, the strontium maybe throwing that off considerably.] I hadn't looked at DHA yet so am curious about it too.

The excerpt is from the abstract at the URL cited People can search under the same title for the complete article.
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"After 12 months of consecutive supplemental micronutrient therapy with a combination that included vitamin D(3), vitamin K(2), strontium, magnesium and docosahexaenoic acid (DHA), repeat bone densitometry was performed. The results were analyzed in a group of compliant patients and demonstrate improved BMD in patients classified with normal, osteopenic and osteoporotic bone density. According to the results, this combined micronutrient supplementation regimen appears to be at least as effective as bisphosphonates or strontium ranelate in raising BMD levels in hip, spine, and femoral neck sites. No fractures occurred in the group taking the micronutrient protocol. This micronutrient regimen also appears to show efficacy in individuals where bisphosphonate therapy was previously unsuccessful in maintaining or raising BMD. Prospective clinical trials are required to confirm efficacy."

From "Combination of Micronutrients for Bone (COMB) Study: bone density after micronutrient intervention"
https://pubmed.ncbi.nlm.nih.gov/22291722/