The Claim
In female weanling Sprague-Dawley rats, higher dietary vitamin D3 intake (2–4 IU/g) is associated with greater lean mass accretion over an 8-week period compared to lower dietary vitamin D3 intake (1 IU/g), without significant changes in body weight or fat mass.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
When young female rats eat more vitamin D3 in their food, they grow more muscle over 8 weeks, but their overall weight and fat don’t change.
See the scientific wording
In female weanling Sprague-Dawley rats, higher dietary vitamin D3 intake (2–4 IU/g) is associated with greater lean mass accretion over 8 weeks compared to lower intake (1 IU/g), without changes in body weight or fat mass.
What the research says
1 studyRats that ate more vitamin D3 gained more muscle over 8 weeks without getting heavier or fatter, exactly what the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.