'Shine on Scotland'
The health secretary is due to speak at the Shine on Scotland conference on Tuesday, which will bring together academics from across the world to consider the possible links between vitamin D deficiency and various health problems.
The event is taking place after schoolboy Ryan McLaughlin took a petition to the Scottish Parliament which called on ministers to produce new guidelines on vitamin D supplements for children and pregnant women, along with an awareness campaign about the issue.
Ryan took up the cause after watching his mother Kirsten suffering from MS.
He said: "It's amazing that I only launched Shine on Scotland early last year and so much has happened since.
"The petition lodged at the Scottish Parliament got great support and I'm really grateful to the Scottish government for being prepared to look at this issue.
"I hope the summit is a great success and that something positive can be done for people with MS and to prevent future generations from developing it."
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