Supplementation

Diet comes first.

Some at-risk women may still need targeted supplemental support.

Calcium

Aim for about 1200 mg/day total from diet plus supplements.

Use a food-first approach when possible.

In aromatase-inhibitor settings, supplements usually fill the gap rather than replace food intake.

Many people only need 200–400 mg/day from supplements.

Avoid supplementing calcium if serum calcium is above 9.5 mg/dL. Additional vitamin K2 may be needed.

Some forms:

• d-malate

• MCHA

• avoid citrates with kidney disease or a low-oxalate diet.

High-oxalate foods can cancel out roughly 150 mg of calcium in the same meal.

One example of combinations to avoid is spinach with yogurt in a smoothie.

Vitamin D3

A practical target is 50–80 ng/mL or about 125–200 nmol/L.

Magnesium

Use magnesium through both food and supplements when needed.

Aim for at least half as much magnesium as the calcium dose.

Some forms:

• di-malate

• glycinate

Di-malate is often considered the more absorbable option.

Glycinate is also well absorbed and is often chosen for its calming effect.

Vitamin K support

Useful forms to know:

• K1

• K2 MK-4

• K2 MK-7

Use extra caution with clotting disorders, anticoagulant use, or related cardiac risk.

For more detail on vitamin K2 for bone support and reducing arterial calcification, see Vitamin K2 research notes.

One combination product is Thorne Vitamin K at 1 capsule twice daily.

Each capsule provides:

• vitamin K1 1 mg

• vitamin K2 MK-4 5 mg

• vitamin K2 MK-7 90 mcg

MK-4 can also be taken separately alongside MK-7.

One option is Thorne vitamin K2 liquid, which provides 1 mg MK-4 per drop.

For those who prefer a higher-dose MK-4 product, one option is Klaire Labs/SFI Ultra K2 Menaquinone-4.

Many companies offer 90 mcg MK-7 because it is less expensive to produce than the MK-4 form, but MK-4 may offer an advantage for bone health see Vitamin K2 research notes.

If you have a documented clotting disorder, atrial fibrillation under active management, or use anticoagulants, review any vitamin K supplement with your clinician before use.

Safety data for K2 in that setting remain limited.

Trace minerals

Zinc, boron, vanadium, and silicon are also relevant to bone support.

Recommended copper- and iron-free options are Seeking Health Trace Minerals II No CU or FE or Pure Encapsulsations Trace Minerals.

Protein-matrix support

Collagen matrix support depends on:

• proline

• glycine

• hydroxyproline

Some ideas:

• digestive support when protein breakdown is compromised by PPI use, oncology treatments, or other challenges

• bone broth

• collagen peptides (Gelita tradmarked peptides are recommended)

• amino acid supplement (Perfect Aminos is recommended)

Digestive support options include HCl with pepsin and pancreatic enzymes.

For people with low protein intake, vegetarian or vegan diets, or sarcopenia risk, options include Perfect Amino or collagen peptides, especially types I and III (Gelita trademarked forms such as in Designs for Health Whole Body Collagen).

Creatine

Creatine may help support both muscle mass and bone.

A practical dose is 5 g twice daily.

Older adults may need 10–20 g/day to replenish stores.

Creatine may be appropriate for vegetarians and breast cancer survivors in remission.

Use extra caution with creatine during active breast cancer because clinical data are limited.

Creatine supplementation for older adults:
https://pubmed.ncbi.nlm.nih.gov/35688360/

Genistein

Genistein may be a useful bone-support option with certain cautions.

Do not combine genistein supplementation with tamoxifen without clinician guidance.

In ER-positive disease, or during endocrine therapy, review genistein with the oncology team or pharmacist before use.

For more detail, see Genistein and bone health.

For ER-positive dosing, see Genistein Dosing in ER-Positive Breast Cancer.

Examples include:

• MCS Formulas Genistein as a non-soy, higher dose option

• DFH Osteoben as a calcium, magnesium, and genistein combination may not be appropriate for use in ER+ breast cancer due to the lower dose of genistein.

What’s in this hub

• Bone density testing: DXA interpretation, T-scores, trabecular bone score, and scan-reading pitfalls.

• Lab tests and root-cause workup: Baseline bloodwork, bone-turnover markers, and specialist follow-up tests.

• Diet and protein: Protein targets, mineral priorities, and oxalate-related food notes.

• Supplementation: Calcium, vitamin D, magnesium, K vitamins, creatine, and related support notes.

• Exercise and bone loading: Resistance work, impact loading, and bone-metastasis safety cautions.

• Vitamin K2 research notes: Reference links and caution notes on MK-4, MK-7, and arterial-calcification context.

• Genistein and bone health: Research notes on genistein for bone support, including oncology cautions.