Rugby Multi-Vitamins Review

This is a basic multivitamin, and none of its ingredients has strong proof of helping the thyroid at the amounts in this product. Vitamin D reaches a studied amount at two servings a day. A pooled review of 12 trials in people with Hashimoto's thyroiditis found vitamin D lowered thyroid antibodies and raised thyroid hormones ^[1], and smaller trials in women with Hashimoto's found lower antibodies ^[2][3]. Other work disagrees: a network review found vitamin D alone did not lower antibodies over six months ^[4], and a three year trial in Graves' disease found no benefit ^[5]. Vitamin A here is well below the studied dose. Trials that helped thyroid markers used 25,000 units daily or very large single doses, mostly in people low in vitamin A ^[6][7]. Vitamin C is only a trace amount compared with the 500 milligrams studied, and even at that dose a placebo-controlled trial found no change ^[8]. No human study shows that thiamine, riboflavin, niacin, vitamin B6, pantothenic acid or calcium improves thyroid health ^{[9][10][11][12][13]}. Animal and cell studies are never counted.

Every ingredient here is a smaller ingredient in this product, and vitamin D drew the most comment, from all ten panelists. Most of the panel recommends or uses it: three take vitamin D3 in the morning, with three of them giving 5000 IU, and the reasons given include general health, longevity, immune function, brain health, muscle and bone support, and making up for low sun in fall and winter. One panelist advises taking it with dietary fat for better absorption, and another cautions that for most people there is little point supplementing unless they are deficient. Vitamin C was discussed by five of them, mostly as a recommendation, and they pair it with collagen for joints and connective tissue, and also mention skin health and immune support, with one giving a dose of 500 mg to 1 g; one panelist only recounted being told it was dangerous. Vitamin A and calcium got only brief, neutral mentions, and no one said they stopped taking any of these.