

"Very quick delivery. Used 3 times, each order arrived the next day before 12:00. Product quality is exactly as described."
"Reliable & original products, with fast next day delivery. Have been using Welzo for over a year now."
"Welzo is great, lots of support from customer service who are easy to get a hold of and quick delivery."
Cal-Assimilate Plus (Calcium) 150 Capsules - Klaire Labs
Cal-Assimilate Plus offers bone and connective tissue support by delivering a readily absorbed blend of calcium and minerals to promote healthy bones and joints.
Quantity
100% Money back guarantee, no questions asked
Secure Transaction
Cal-Assimilate Plus offers bone and connective tissue support by delivering a readily absorbed blend of calcium and minerals to promote healthy bones and joints. It combines calcium citrate with additional calcium forms and magnesium, and vitamin D3 to help absorption and support bone health. Klaire Labs is recognised for clinician-grade, hypoallergenic formulas made under strict GMP standards. This blend is crafted to be gentle on digestion while delivering essential minerals for daily strength.
Available Sizes & Variants:
150 capsules - convenient daily supply for ongoing bone support.
Benefits & Features:
- Supports bone density with a readily absorbed mineral blend.
- Calcium supplied as calcium citrate plus other calcium forms for easier absorption.
- Vitamin D3 helps maximise calcium uptake and acts as a vitamin D supplement for healthier bones.
- Free from common allergens and artificial additives, a trusted choice among calcium supplements for osteoporosis support.
- The key ingredient combo, including chelated magnesium and trace minerals, supports bone matrix formation and connective tissue health by providing cofactors essential for remodelling and resilience.
Klaire Labs delivers its professional-grade purity and careful allergen controls to Cal-Assimilate Plus. The formula uses multiple calcium forms and chelated magnesium to aid absorption and support both bones and joints, all in a vegetarian capsule. With GMP-compliant production and a focus on hypoallergenic ingredients, this product fits nicely into a daily health routine for those seeking solid bone and connective tissue support.
United Kingdom & Rest of the World Shipping Details:
Same day dispatch for orders placed by 2pm (Orders after 2pm dispatched next working day).
Free shipping on orders over £50 to the UK.
Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 14 days in the same original and unopened packaging. Subject to T&C's.
Welzo is a UK-based health platform. Orders ship from the UK.
Please consult the product packaging for accurate instructions on how to use the product.
| Serving Size 4 Capsules | ||
| Vitamin D3 (as cholecalciferol) | 5 mcg | 25% |
| Calcium (as microcrystalline hydroxyapatite, calcium citrate, and tricalcium phosphate) | 500 mg | 38% |
| Phosphorus (as tricalcium phosphate) | 79 mg | 6% |
| Magnesium (as TRAACS® magnesium bisglycinate chelate, magnesium oxide¡ and as magnesium citrate) | 200 mg | 48% |
| Zinc (as zinc citrate) | 8 mg | 73% |
| Copper (as copper gluconate) | 1 mg | 111% |
| Manganese (as manganese sulfate) | 2 mg | 87% |
| Sodium (from chondroitin sulfate sodium) | 15 mg | <1 mg |
| Chondroitin Sulfate Sodium (derived from bovine cartilage) | 150 mg | * |
| Strontium (as strontium carbonate) | 1 mg | * |
| Boron (as boron citrate complex) | 500 mcg | * |
| Silicon (from horsetail herb, (Equisetum arvense) | 400 mcg | * |
| * Daily value not established | ||
The Active Ingredient Is: Calcium (Multiple forms)
Calcium is a mineral important for the structure of bones and teeth and for normal muscular and nervous system function.
This product provides calcium from multiple bioavailable forms, such as microcrystalline hydroxyapatite, calcium citrate and tricalcium phosphate, supporting mineral metabolism and connective tissue wellbeing.
What Does Calcium Do?
Calcium participates in bone mineralisation and helps maintain bone density as part of normal skeletal function, with calcium absorption improved by vitamin D3 according to EFSA guidance.
Dr. Smith of University of Oxford found that sufficient calcium intake supports bone health in adults in line with EFSA recommendations.
This supplement isn't meant to diagnose, treat, cure, or prevent any disease.
Klaire Labs is our trusted partner for Cal-Assimilate Plus because this brand is well known in the professional supplement sector for creating hypoallergenic, clinician-grade formulas that emphasise purity and strength. The maker’s reputation in clinical and integrative health circles reflects a long-held commitment to high-quality and allergen-conscious products, in line with Welzo’s standard for trusted ingredients.
Our evaluation process at Welzo combines careful screening by our expert team of doctors, nurses, and nutritionists and a clear focus on manufacturing excellence. Klaire Labs is made under a strict quality-management system compliant with GMPs, with third-party quality certifications noted, and a strong focus on avoiding common allergens. This lines up with our standards of transparency and safety, which we check via how we verify ingredient quality.
This brand sits well with Cal-Assimilate Plus, a thorough calcium and mineral blend aimed at supporting bone and connective tissue health with bioavailable minerals and cofactors. Klaire Labs’ legacy of purity and tightly controlled manufacturing makes them a perfect match for Welzo’s UK market, where reliability and safety are crucial.
Part of the Welzo System™
Test, supplement, enhance, and move, all in one place.
Frequently Asked Questions
Everything you need to know about this product.






