The Physical Foundation Research Hub

Bone, muscle, joint and connective tissue are usually discussed separately. Physiologically they are not separate. They share a collagen scaffold, they draw on an overlapping set of nutrients, and they respond to the same mechanical signal.

Muscle pulls on bone at its attachment. That pull is a substantial part of the strain bone interprets as an instruction to build. Muscle also decelerates load before it reaches cartilage, so muscular strength governs the peak force a joint absorbs. Collagen forms the flexible matrix of bone, the substance of tendon and ligament, and the framework of cartilage. Vitamin C is the cofactor for building all of it.

This is why decline in these systems tends to arrive together, and why intervention in one tends to benefit the others. It is also why a nutrient assessed in isolation is assessed incompletely.

What a healthy diet covers, and what it may not

The question of whether diet alone suffices is more specific than it first appears.

A varied diet reliably supplies enough of most nutrients to prevent deficiency. Deficiency is not the relevant threshold. Public intake recommendations were largely established to prevent deficiency states, not to optimise tissue maintenance in a post-menopausal woman with anabolic resistance and accelerated bone turnover. Those are different targets, and the second is higher.

Several factors compound after menopause. Absorption of certain minerals declines with age. The muscle-building response to a given protein dose weakens, raising the effective requirement. Some nutrients occur reliably in foods many people eat rarely, and the marine omega-3s are the clearest example. Vitamin D depends substantially on sun exposure, which is limited at northern latitudes for much of the year regardless of diet.

None of this means diet is inadequate for everyone, and it is not an argument that supplementation is universally necessary. It means the honest answer depends on what a particular woman eats, where she lives, and what her body now demands. That is a more useful answer than either reassurance or alarm.

How Silvie evaluates the evidence

We select ingredients by form, not only by name. The form determines how much of a nutrient reaches the tissue that needs it, and two products naming the same compound can differ substantially in what the body absorbs. Where a specific form has been used in the human trials, that is the form we use.

We dose to the levels tested in those published trials rather than to the smallest quantity that permits a claim on the label. A dose below the studied range is not a smaller version of the same effect. Often it is no effect at all.

We prioritise human studies. Mechanistic and animal research is useful for understanding why something might work, but it is not evidence that it does. Where the human evidence is mixed, preliminary or limited to a narrow population, we say so in the article rather than omitting it from the marketing.

We are also clear about what supplementation cannot do. It fills gaps between what a diet supplies and what a tissue requires. It does not replace food, and it does not replace the mechanical loading that tells these systems to maintain themselves.

You can read how we assess evidence, select ingredient forms and set doses in our approach to research.