Silica Horsetail
Also called orthosilicic acid, choline-stabilised orthosilicic acid, ch-osa and 6 more
biosil, bamboo extract, bamboo silica, horsetail, horsetail extract, equisetum arvense.
Priced per 50 mg silica (as labelled). So far this form only turns up in combination products.
Comparing silica
We count the silica (as labelled) a label states per serving, whatever the pack size or the serving size, so every product sits on one scale. Silica comes as bamboo extract, horsetail and orthosilicic acid, and each form has its own table, because someone buying one would not usually take another as a like-for-like substitute. Products that combine silica with other ingredients are listed separately, because their price buys more than silica (as labelled). 50 mg is our unit for comparing prices, not a dose to take: the label’s directions and a pharmacist decide that.
| Rank | Product | Per 50 mg silica (as labelled) | Per month | Lasts | Buy | How it is worked out |
|---|---|---|---|---|---|---|
| + |  Cheapest per doseBest value under 6 months' supplyCytoProtect Hair, Skin & Nails  · 60 capsules · 60 servings · 1.4 mg a servingDetails and price historyAdd to my stackCombination: price counts the silica onlyalso contains vitamin c, zinc, selenium… | £13.68 | £410.54 | 2 days | £22.99View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared. | Show the working
What the retailer's listing says
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Only combination products for this form
The one product here contains silica alongside other ingredients, so it is not ranked against single-ingredient products. Its price per dose counts the silica only.
How we work out these prices
We count the silica (as labelled) a product provides, not the weight of the whole compound it comes in. If a label states the silica (as labelled) amount, we use it. If it only gives the compound's weight, we estimate using a published conversion factor and mark the figure “estimated”. If we cannot tell which the number means, the product is left out until it can be confirmed.