Nutrition Rescue Vitamin C Powder Review

Vitamin C is the only ingredient in this powder, and the amount is well above the 200 mg a day that worked in studies. It is also above the daily recommended limit, so members can take less. The evidence suggests modest immune support, mainly for colds. A large pooled review of 29 trials with over 11,000 people found that vitamin C did not make colds less common in the general public. Colds were about half as common in marathon runners, skiers and soldiers, and they lasted 8% less in adults and 14% less in children ^[1]. A later review of 10 trials found colds were 15% less severe with at least 1 gram a day ^[2]. Another pooled analysis found a 4% lower risk of chest and throat infections and 9% shorter symptoms ^[3]. In a trial of 1,444 army recruits taking 6,000 mg a day for 30 days, cold risk was 20% lower than with a dummy pill ^[4]. However, a review of eight reviews concluded that vitamin C does not prevent catching colds ^[5]. An older trial in 674 marine recruits found colds were no less common and no shorter, though they felt milder ^[6]. Animal and cell studies are never counted.

Most of the panel recommends or uses vitamin C, though a few stay neutral and one stopped a skin serum because of its smell. The most common reasons are collagen support for skin, joints and gums, and immune support, with some also mentioning detox, antioxidant needs and skin repair. Several pair it with collagen, one suggesting about an hour before a workout, and for doses one takes an extra gram a day, another cites 500 mg to 1 g, and another takes 250 mg. Preferred forms include whole foods like citrus, kiwi and bell peppers, a liquid liposomal version, and topical use for skin. Cautions are that the best dose is unclear, high doses might blunt the benefits of exercise, sugar competes with it for absorption, and a few warn that cheap multivitamins are full of fillers and that you should check the product is accurately measured and clean.

The store page mixes in many reviews of a different Nutrient Rescue product, the Double Shot sachets, so the 490 review count and its 100% positive rating cannot be taken as reviews of this vitamin C powder. Its reviews are set aside, so it is graded on its studies alone. Human studies support Vitamin C (10 of 33 human studies showed an improvement), but there are not yet enough reviews to confirm it (0).

Combine with: For blood flow, pair vitamin C with L-citrulline or L-arginine to boost nitric oxide production; vitamin C helps protect nitric oxide from oxidative breakdown. Beetroot extract (dietary nitrates), pomegranate extract, and grape seed extract can further support vasodilation and endothelial health. Magnesium, omega-3 fish oil, and CoQ10 add cardiovascular and circulatory support, while vitamin K2 and vitamin E support vascular health. For its core immune role, vitamin C combines well with zinc, vitamin D3, and quercetin, which improves vitamin C uptake and activity.