小时候，每逢冬春缺新鲜蔬菜水果时，妈妈会从医院开些魚肝油、维生素C（那年头也叫“抗坏血酸”）之类。更多的时候从药店买，当时很便宜，就是老缺货。
还记得维生素C的小圆柱型棕色瓶，里面装的绿豆大黄色小圆粒。每天每人给三五粒，大人们喝口水咽下去了。俺特喜欢那味道，每次一粒在嘴里含着，先甜后酸，最后剩个小硬心，嚼起来嘎嘣响。
那时候的维生素C，都是从橙子里提纯的，味道特好，闻着也舒服。
有一次实在忍不住，一口气吃了小半瓶。接下来肚子疼，串稀，闹腾一夜。
打那起，不再贪多了。
文革起，爸、妈被改造，特权没了。每人每月发八块钱生活费，除了饭伙，连煤都买不起了，别说啥维生素了。
以后长大了，再也没用。
后来有了孩子，再喂维生素。
不过，魚肝油没有了，叫啥维生素D。抗坏血酸也改称维生素C，不用橙子了，都是人工半合成的。
更便宜了，也没那些诱人的味道了。每次费尽心思哄孩子吃。
再次服用维生素C，己经是2015年了。系统化疗后特疲惫，加服vc有利于体能恢复。当时用的是500mg片剂，早晚一粒随饭走。
这次新冠疫情开始后，买了些片剂备着，后来又买了一桶粉剂，按磅算，特便宜。专门预备一个小塑料勺，一满勺为四克。有点风吹着凉，挖一勺，冲半杯水，趁热喝。效果不错，就是胃里不好受。我还能挺，家里那位不行。
https://www.amazon.com/gp/product/B00ZVNCXOM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
于是，查找VC的代用品、或肠溶胶囊。找到了这种脂质体Vc。
https://www.amazon.com/gp/product/B07DH1ZJZ9/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
这东东最大的好处是没有胃肠道刺激作用，而且缓释，可以长时间维持稳定血液浓度，无需几小时服一次。我们在有感冒症状时，立即服四粒，差不多当天就好。没好利索，第二天再来四粒。
打去年起，又发现新的针对新冠开发的复方剂型。据称能提供24小时免疫防御。
https://www.amazon.com/gp/product/B08NKKVK5Q/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
除了脂化VC外，加了锌、VD、VA等多种据说能抗新冠的成分。小贵，仍能承受。
我们每次外出购物、上班、看病时，早上服一粒。
有流涕、鼻塞、咽喉不适时，“吞”四粒。千万別四粒一起放嘴里咽，一粒咽下去，再来一粒。
效果不错，就是粒大，嗓子眼儿小的可能被噎住。
随着时代，VC也在不断翻花样，应用越来越多。
附
1. 中国VC史
https://www.sohu.com/a/225144824_100030976
“维生素C最早是从动植物中提炼出来的，如橙子。后来人们可能发现太费橙子了，于是发明出发酵制造法来生产维C，通过微生物或酶将有机化合物分解成其它化合物的方法”
…………
“1980年，中国无法忍受长期被海外巨头把持维C产业的局面，成功改进了维C的生产工艺，当时中科院微生物所尹光琳发明了“两段发酵法”，大大降低了维C生产的复杂程度和生产环境要求，更重要的是极大地降低了维C的生产成本，这大大提升了维生素C的产量。”
…………
“到今天，全球超过90%的维C由四家中国药厂——东北制药、华北制药、石药集团和江山制药生产，中国具有维C绝对的产量权和定价权”
2. 粉沫状脂质体VC
https://coremedscience.com/blogs/wellness/how-to-pick-the-best-liposomal-vitamin-c
There are two basic types of liposomal supplements that have to do with "liposome" formation. The first is an already formed liposome vitamin C and, while the other is a pro-liposome. A pro-liposome is chemically bound vitamin C and contains phospholipids in a manner which will result in a liposome formation in the presence of water at body temperature.
The simplest way to tell if a product is a formed liposome is if the ingredients include water. If water is in the ingredients, you are likely dealing with formed liposomes. If not, you are looking at a pro-liposome. Make sure however that both contain phospholipids like phosphatidylcholine (derived from lecithin).
A pro-liposome has the potential to become a liposome when exposed to water, forcing the phospholipids to immediately congregate by natural hydrophobic forces into a bi-layer as described above.
In the form of a pro-liposomal powder, the vitamin C is surrounded (conjugated) by a layer of phospholipids and other fats in a special technical process that can greatly vary in effectiveness. How well this proprietary process of binding the lipids to the vitamin C occurs is key, because if the lipids and the vitamin C are only mixed together (not bound), the formation of liposomes with vitamin C inside will be sporadic at best as the vitamin C can just disperse away separately from the lipids.
3. 脂化C
Safety and tolerance of ester-C compared with regular ascorbic acid
https://pubmed.ncbi.nlm.nih.gov/16644619/
https://return2.health/articles/3faces-vitaminc
https://pediaa.com/difference-between-vitamin-c-and-ester-c/
Ester C contains Calcium ascorbate as its the main chemical ingredient. Its IUPAC name is calcium (2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2H-furan-3-olate. Its chemical formula is CaC12H14O12. It also contains vitamin C metabolites.
Ester C has three or four times greater bioavailability than regular natural vitamin C. But this fact is highly controversial.
Ester C is a pH neutral product.
声明：俺不是带货的。不对产品质量负责。
PS
以前写的用VC治疗新冠
https://blog.wenxuecity.com/myblog/73054/202010/8499.html
